annotate xml/en/docs/http/configuring_https_servers.xml @ 658:bd81a71006fe

Documented that most browsers won't pass an IP address as a server name in an SNI during SSL handshake.
author Ruslan Ermilov <ru@nginx.com>
date Tue, 28 Aug 2012 09:15:17 +0000
parents 130fad6dc1b4
children 77a3314c74a7
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1 <!--
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2 Copyright (C) Igor Sysoev
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3 Copyright (C) Nginx, Inc.
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4 -->
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5
50
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6 <!DOCTYPE article SYSTEM "../../../../dtd/article.dtd">
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7
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8 <article name="Configuring HTTPS servers"
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9 link="/en/docs/http/configuring_https_servers.html"
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10 lang="en"
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11 rev="2"
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12 author="Igor Sysoev"
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13 editor="Brian Mercer">
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14
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15 <section>
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16
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17 <para>
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18 To configure an HTTPS server you must enable the SSL protocol
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19 in the server block, and specify the locations of the server certificate
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20 and private key files:
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21
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22 <programlisting>
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23 server {
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24 listen 443;
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25 server_name www.example.com;
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26 ssl on;
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27 ssl_certificate www.example.com.crt;
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28 ssl_certificate_key www.example.com.key;
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29 ssl_protocols SSLv3 TLSv1 TLSv1.1 TLSv1.2;
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30 ssl_ciphers HIGH:!aNULL:!MD5;
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31 ...
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32 }
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33 </programlisting>
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34
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35 The server certificate is a public entity.
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36 It is sent to every client that connects to the server.
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37 The private key is a secure entity and should be stored in a file with
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38 restricted access, however, it must be readable by nginx&rsquo;s master process.
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39 The private key may alternately be stored in the same file as the certificate:
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40
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41 <programlisting>
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42 ssl_certificate www.example.com.cert;
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43 ssl_certificate_key www.example.com.cert;
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44 </programlisting>
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45
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46 in which case the file access rights should also be restricted.
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47 Although the certificate and the key are stored in one file,
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48 only the certificate is sent to a client.
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49 </para>
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50
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51 <para>
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52 The directives <link doc="ngx_http_ssl_module.xml" id="ssl_protocols"/> and
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53 <link doc="ngx_http_ssl_module.xml" id="ssl_ciphers"/>
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54 can be used to limit connections
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55 to include only the strong versions and ciphers of SSL/TLS.
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56 Since version 1.0.5, nginx uses “<literal>ssl_protocols SSLv3 TLSv1</literal>”
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57 and “<literal>ssl_ciphers HIGH:!aNULL:!MD5</literal>” by default,
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58 so configuring them explicitly only makes sense for the earlier nginx versions.
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59 Since versions 1.1.13 and 1.0.12, nginx uses
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60 “<literal>ssl_protocols SSLv3 TLSv1 TLSv1.1 TLSv1.2</literal>” by default.
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61 </para>
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62
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63 <para>
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64 CBC-mode ciphers might be vulnerable to a number of attacks and to
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65 the BEAST attack in particular (see
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66 <link url="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-3389">CVE-2011-3389</link>).
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67 Configuration of ciphers can be adjusted to prefer RC4-SHA as the following:
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68
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69 <programlisting>
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70 ssl_ciphers RC4:HIGH:!aNULL:!MD5;
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71 ssl_prefer_server_ciphers on;
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72 </programlisting>
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73 </para>
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74
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75 </section>
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76
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77
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78 <section id="optimization" name="HTTPS server optimization">
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79
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80 <para>
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81 SSL operations consume extra CPU resources.
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82 On multi-processor systems you should run several worker processes:
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83 no less than the number of available CPU cores.
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84 The most CPU-intensive operation is the SSL handshake.
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85 There are two ways to minimize the number of these operations per client:
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86 the first is by enabling keepalive connections to send several
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87 requests via one connection and the second is to reuse SSL session
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88 parameters to avoid SSL handshakes for parallel and subsequent connections.
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89 The sessions are stored in an SSL session cache shared between workers
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90 and configured by the
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91 <link doc="ngx_http_ssl_module.xml" id="ssl_session_cache"/>
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92 directive.
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93 One megabyte of the cache contains about 4000 sessions.
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94 The default cache timeout is 5 minutes.
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95 It can be increased by using the
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96 <link doc="ngx_http_ssl_module.xml" id="ssl_session_timeout"/>
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97 directive.
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98 Here is a sample configuration optimized for a quad core system
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99 with 10M shared session cache:
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100
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101 <programlisting>
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102 <b>worker_processes 4</b>;
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103
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104 http {
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105 <b>ssl_session_cache shared:SSL:10m</b>;
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106 <b>ssl_session_timeout 10m</b>;
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107
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108 server {
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109 listen 443;
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110 server_name www.example.com;
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111 <b>keepalive_timeout 70</b>;
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112
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113 ssl on;
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114 ssl_certificate www.example.com.crt;
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115 ssl_certificate_key www.example.com.key;
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116 ssl_protocols SSLv3 TLSv1 TLSv1.1 TLSv1.2;
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117 ssl_ciphers HIGH:!aNULL:!MD5;
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118 ...
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119 </programlisting>
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120 </para>
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121
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122 </section>
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123
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124
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125 <section id="chains" name="SSL certificate chains">
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126
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127 <para>
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128 Some browsers may complain about a certificate signed by a well-known
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129 certificate authority, while other browsers may accept the certificate
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130 without issues.
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131 This occurs because the issuing authority has signed the server certificate
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132 using an intermediate certificate that is not present in the certificate
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133 base of well-known trusted certificate authorities which is distributed
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134 with a particular browser.
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135 In this case the authority provides a bundle of chained certificates
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136 which should be concatenated to the signed server certificate.
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137 The server certificate must appear before the chained certificates
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138 in the combined file:
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139
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140 <programlisting>
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141 $ cat www.example.com.crt bundle.crt > www.example.com.chained.crt
0
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142 </programlisting>
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143
271
4c6d2c614d2c Cleaned up XML tag mess:
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diff changeset
144 The resulting file should be used in the
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145 <link doc="ngx_http_ssl_module.xml" id="ssl_certificate"/>
0
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146 directive:
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147
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148 <programlisting>
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149 server {
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150 listen 443;
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9913f1d51c07 Replaced "nginx" domain names with example domains.
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151 server_name www.example.com;
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152 ssl on;
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diff changeset
153 ssl_certificate www.example.com.chained.crt;
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154 ssl_certificate_key www.example.com.key;
0
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155 ...
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156 }
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157 </programlisting>
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158
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159 If the server certificate and the bundle have been concatenated in the wrong
61e04fc01027 Initial import of the nginx.org website.
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160 order, nginx will fail to start and will display the error message:
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161
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162 <programlisting>
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163 SSL_CTX_use_PrivateKey_file(" ... /www.example.com.key") failed
0
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164 (SSL: error:0B080074:x509 certificate routines:
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165 X509_check_private_key:key values mismatch)
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166 </programlisting>
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167
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168 because nginx has tried to use the private key with the bundle&rsquo;s
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169 first certificate instead of the server certificate.
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170 </para>
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171
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172 <para>
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173 Browsers usually store intermediate certificates which they receive
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174 and which are signed by trusted authorities, so actively used browsers
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175 may already have the required intermediate certificates and
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176 may not complain about a certificate sent without a chained bundle.
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177 To ensure the server sends the complete certificate chain,
266
c09d374c86c6 Cosmetics.
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178 you may use the <command>openssl</command> command-line utility, for example:
0
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179
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180 <programlisting>
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181 $ openssl s_client -connect www.godaddy.com:443
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182 ...
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183 Certificate chain
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184 0 s:/C=US/ST=Arizona/L=Scottsdale/1.3.6.1.4.1.311.60.2.1.3=US
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185 /1.3.6.1.4.1.311.60.2.1.2=AZ/O=GoDaddy.com, Inc
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186 /OU=MIS Department/<b>CN=www.GoDaddy.com</b>
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187 /serialNumber=0796928-7/2.5.4.15=V1.0, Clause 5.(b)
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188 i:/C=US/ST=Arizona/L=Scottsdale/O=GoDaddy.com, Inc.
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189 /OU=http://certificates.godaddy.com/repository
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190 /CN=Go Daddy Secure Certification Authority
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191 /serialNumber=07969287
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192 1 s:/C=US/ST=Arizona/L=Scottsdale/O=GoDaddy.com, Inc.
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193 /OU=http://certificates.godaddy.com/repository
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194 /CN=Go Daddy Secure Certification Authority
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195 /serialNumber=07969287
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196 i:/C=US/O=The Go Daddy Group, Inc.
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197 /OU=Go Daddy Class 2 Certification Authority
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198 2 s:/C=US/O=The Go Daddy Group, Inc.
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199 /OU=Go Daddy Class 2 Certification Authority
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200 i:/L=ValiCert Validation Network/O=<b>ValiCert, Inc.</b>
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201 /OU=ValiCert Class 2 Policy Validation Authority
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202 /CN=http://www.valicert.com//emailAddress=info@valicert.com
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203 ...
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204 </programlisting>
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205
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206 In this example the subject (&ldquo;<i>s</i>&rdquo;) of the
593
130fad6dc1b4 Replaced the uses of "url" element with "literal".
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207 <literal>www.GoDaddy.com</literal> server certificate #0 is signed by an issuer
0
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208 (&ldquo;<i>i</i>&rdquo;) which itself is the subject of the certificate #1,
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209 which is signed by an issuer which itself is the subject of the certificate #2,
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210 which signed by the well-known issuer <i>ValiCert, Inc.</i>
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211 whose certificate is stored in the browsers&rsquo; built-in
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212 certificate base (that lay in the house that Jack built).
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213 </para>
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214
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215 <para>
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216 If you have not added the certificates bundle, you will see only your server
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217 certificate #0.
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218 </para>
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219
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220 </section>
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221
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222
121
49443032011c Unified <section> syntax for "article" and "module" documents.
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223 <section id="single_http_https_server" name="A single HTTP/HTTPS server">
0
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224
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225 <para>
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226 It is good practice to configure separate servers for HTTP and HTTPS
61e04fc01027 Initial import of the nginx.org website.
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227 protocols from the very start. Although their functionalities currently
61e04fc01027 Initial import of the nginx.org website.
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228 seem equal, this may change significantly in the future
61e04fc01027 Initial import of the nginx.org website.
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229 and using a consolidated server may become problematic.
61e04fc01027 Initial import of the nginx.org website.
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230 However, if HTTP and HTTPS servers are equal,
61e04fc01027 Initial import of the nginx.org website.
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231 and you prefer not to think about the future,
61e04fc01027 Initial import of the nginx.org website.
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232 you may configure a single server that handles both HTTP and HTTPS requests
271
4c6d2c614d2c Cleaned up XML tag mess:
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diff changeset
233 by deleting the directive “<literal>ssl on</literal>”
4c6d2c614d2c Cleaned up XML tag mess:
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diff changeset
234 and adding the <literal>ssl</literal> parameter for *:443 port:
0
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235
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236 <programlisting>
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237 server {
61e04fc01027 Initial import of the nginx.org website.
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238 listen 80;
61e04fc01027 Initial import of the nginx.org website.
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239 listen 443 ssl;
490
9913f1d51c07 Replaced "nginx" domain names with example domains.
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240 server_name www.example.com;
9913f1d51c07 Replaced "nginx" domain names with example domains.
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241 ssl_certificate www.example.com.crt;
9913f1d51c07 Replaced "nginx" domain names with example domains.
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diff changeset
242 ssl_certificate_key www.example.com.key;
0
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243 ...
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244 }
61e04fc01027 Initial import of the nginx.org website.
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245 </programlisting>
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246
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247 <note>
271
4c6d2c614d2c Cleaned up XML tag mess:
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diff changeset
248 Prior to 0.8.21, nginx only allows the <literal>ssl</literal> parameter
4c6d2c614d2c Cleaned up XML tag mess:
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diff changeset
249 to be set on listen sockets with the <literal>default</literal> parameter:
0
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250 <programlisting>
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251 listen 443 default ssl;
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252 </programlisting>
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253 </note>
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254 </para>
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255
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256 </section>
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257
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258
121
49443032011c Unified <section> syntax for "article" and "module" documents.
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diff changeset
259 <section id="name_based_https_servers" name="Name-based HTTPS servers">
0
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260
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261 <para>
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262 A common issue arises when configuring two or more HTTPS servers
61e04fc01027 Initial import of the nginx.org website.
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263 listening on a single IP address:
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264
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265 <programlisting>
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266 server {
61e04fc01027 Initial import of the nginx.org website.
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267 listen 443;
490
9913f1d51c07 Replaced "nginx" domain names with example domains.
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268 server_name www.example.com;
0
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269 ssl on;
490
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diff changeset
270 ssl_certificate www.example.com.crt;
0
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271 ...
61e04fc01027 Initial import of the nginx.org website.
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272 }
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273
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274 server {
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275 listen 443;
490
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diff changeset
276 server_name www.example.org;
0
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277 ssl on;
490
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diff changeset
278 ssl_certificate www.example.org.crt;
0
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279 ...
61e04fc01027 Initial import of the nginx.org website.
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280 }
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281 </programlisting>
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282
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283 With this configuration a browser receives the certificate of the default
593
130fad6dc1b4 Replaced the uses of "url" element with "literal".
Ruslan Ermilov <ru@nginx.com>
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284 server, i.e., <literal>www.example.com</literal> regardless of the requested server name.
0
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285 This is caused by SSL protocol behaviour. The SSL connection is established
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
286 before the browser sends an HTTP request and nginx does not know
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
287 the name of the requested server. Therefore, it may only offer the certificate
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
288 of the default server.
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
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289 </para>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
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290
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
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291 <para>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
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292 The oldest and most robust method to resolve the issue
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
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diff changeset
293 is to assign a separate IP address for every HTTPS server:
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
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294
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
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295 <programlisting>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
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296 server {
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
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297 listen 192.168.1.1:443;
490
9913f1d51c07 Replaced "nginx" domain names with example domains.
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diff changeset
298 server_name www.example.com;
0
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Ruslan Ermilov <ru@nginx.com>
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299 ssl on;
490
9913f1d51c07 Replaced "nginx" domain names with example domains.
Ruslan Ermilov <ru@nginx.com>
parents: 461
diff changeset
300 ssl_certificate www.example.com.crt;
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
301 ...
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
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302 }
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
303
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
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304 server {
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
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305 listen 192.168.1.2:443;
490
9913f1d51c07 Replaced "nginx" domain names with example domains.
Ruslan Ermilov <ru@nginx.com>
parents: 461
diff changeset
306 server_name www.example.org;
0
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Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
307 ssl on;
490
9913f1d51c07 Replaced "nginx" domain names with example domains.
Ruslan Ermilov <ru@nginx.com>
parents: 461
diff changeset
308 ssl_certificate www.example.org.crt;
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
309 ...
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
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310 }
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
311 </programlisting>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
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312 </para>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
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313
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
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314 </section>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
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315
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
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316
121
49443032011c Unified <section> syntax for "article" and "module" documents.
Ruslan Ermilov <ru@nginx.com>
parents: 98
diff changeset
317 <section id="certificate_with_several_names"
49443032011c Unified <section> syntax for "article" and "module" documents.
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parents: 98
diff changeset
318 name="A SSL certificate with several names">
0
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319
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
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320 <para>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
321 There are other ways to share a single IP address between several
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
322 HTTPS servers, however, all of them have drawbacks.
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
323 One way is to use a certificate with several names in
593
130fad6dc1b4 Replaced the uses of "url" element with "literal".
Ruslan Ermilov <ru@nginx.com>
parents: 589
diff changeset
324 the SubjectAltName certificate field, for example, <literal>www.example.com</literal>
130fad6dc1b4 Replaced the uses of "url" element with "literal".
Ruslan Ermilov <ru@nginx.com>
parents: 589
diff changeset
325 and <literal>www.example.org</literal>.
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
326 However, the SubjectAltName field length is limited.
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
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327 </para>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
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328
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
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329 <para>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
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330 Another way is to use a certificate with a wildcard name, for example,
593
130fad6dc1b4 Replaced the uses of "url" element with "literal".
Ruslan Ermilov <ru@nginx.com>
parents: 589
diff changeset
331 <literal>*.example.org</literal>. This certificate matches
130fad6dc1b4 Replaced the uses of "url" element with "literal".
Ruslan Ermilov <ru@nginx.com>
parents: 589
diff changeset
332 <literal>www.example.org</literal>, but does not match <literal>example.org</literal>
130fad6dc1b4 Replaced the uses of "url" element with "literal".
Ruslan Ermilov <ru@nginx.com>
parents: 589
diff changeset
333 and <literal>www.sub.example.org</literal>. These two methods can also be combined.
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
334 A certificate may contain exact and wildcard names in the SubjectAltName field,
593
130fad6dc1b4 Replaced the uses of "url" element with "literal".
Ruslan Ermilov <ru@nginx.com>
parents: 589
diff changeset
335 for example, <literal>example.org</literal> and <literal>*.example.org</literal>.
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
336 </para>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
337
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
338 <para>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
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339 It is better to place a certificate file with several names and
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
340 its private key file at the <i>http</i> level of configuration
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
341 to inherit their single memory copy in all servers:
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
342
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
343 <programlisting>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
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344 ssl_certificate common.crt;
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
345 ssl_certificate_key common.key;
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
346
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
347 server {
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
348 listen 443;
490
9913f1d51c07 Replaced "nginx" domain names with example domains.
Ruslan Ermilov <ru@nginx.com>
parents: 461
diff changeset
349 server_name www.example.com;
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
350 ssl on;
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
351 ...
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
352 }
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
353
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
354 server {
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
355 listen 443;
490
9913f1d51c07 Replaced "nginx" domain names with example domains.
Ruslan Ermilov <ru@nginx.com>
parents: 461
diff changeset
356 server_name www.example.org;
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
357 ssl on;
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
358 ...
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
359 }
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
360 </programlisting>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
361 </para>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
362
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
363 </section>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
364
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
365
121
49443032011c Unified <section> syntax for "article" and "module" documents.
Ruslan Ermilov <ru@nginx.com>
parents: 98
diff changeset
366 <section id="sni" name="Server Name Indication">
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
367
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
368 <para>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
369 A more generic solution for running several HTTPS servers on a single
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
370 IP address is
374
a413dffb0557 Replaced "a href" with "link doc" / "link url".
Ruslan Ermilov <ru@nginx.com>
parents: 314
diff changeset
371 <link url="http://en.wikipedia.org/wiki/Server_Name_Indication">TLSv1.1
a413dffb0557 Replaced "a href" with "link doc" / "link url".
Ruslan Ermilov <ru@nginx.com>
parents: 314
diff changeset
372 Server Name Indication extension</link> (SNI, RFC3546),
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
373 which allows a browser to pass a requested server name during the SSL handshake
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
374 and, therefore, the server will know which certificate it should use
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
375 for the connection.
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
376 However, SNI has limited browser support.
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
377 Currently it is supported starting with the following browsers versions:
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
378 </para>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
379
658
bd81a71006fe Documented that most browsers won't pass an IP address
Ruslan Ermilov <ru@nginx.com>
parents: 593
diff changeset
380 <para>
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
381 <list type="bullet">
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
382
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
383 <listitem>
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
384 Opera 8.0;
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
385 </listitem>
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
386
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
387 <listitem>
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
388 MSIE 7.0 (but only on Windows Vista or higher);
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
389 </listitem>
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
390
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
391 <listitem>
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
392 Firefox 2.0 and other browsers using Mozilla Platform rv:1.8.1;
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
393 </listitem>
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
394
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
395 <listitem>
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
396 Safari 3.2.1 (Windows version supports SNI on Vista or higher);
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
397 </listitem>
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
398
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
399 <listitem>
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
400 and Chrome (Windows version supports SNI on Vista or higher, too).
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
401 </listitem>
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
402
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
403 </list>
658
bd81a71006fe Documented that most browsers won't pass an IP address
Ruslan Ermilov <ru@nginx.com>
parents: 593
diff changeset
404 <note>
bd81a71006fe Documented that most browsers won't pass an IP address
Ruslan Ermilov <ru@nginx.com>
parents: 593
diff changeset
405 If a server is accessed by an IP address, most browsers will
bd81a71006fe Documented that most browsers won't pass an IP address
Ruslan Ermilov <ru@nginx.com>
parents: 593
diff changeset
406 not pass it as a server name during the SSL handshake.
bd81a71006fe Documented that most browsers won't pass an IP address
Ruslan Ermilov <ru@nginx.com>
parents: 593
diff changeset
407 </note>
bd81a71006fe Documented that most browsers won't pass an IP address
Ruslan Ermilov <ru@nginx.com>
parents: 593
diff changeset
408 </para>
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
409
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
410 <para>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
411 In order to use SNI in nginx, it must be supported in both the
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
412 OpenSSL library with which the nginx binary has been built as well as
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
413 the library to which it is being dynamically linked at run time.
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
414 OpenSSL supports SNI since 0.9.8f version if it was built with config option
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
415 <nobr>&ldquo;--enable-tlsext&rdquo;.</nobr>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
416 Since OpenSSL 0.9.8j this option is enabled by default.
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
417 If nginx was built with SNI support, then nginx will show this
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
418 when run with the &ldquo;-V&rdquo; switch:
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
419
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
420 <programlisting>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
421 $ nginx -V
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
422 ...
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
423 TLS SNI support enabled
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
424 ...
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
425 </programlisting>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
426
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
427 However, if the SNI-enabled nginx is linked dynamically to
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
428 an OpenSSL library without SNI support, nginx displays the warning:
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
429
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
430 <programlisting>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
431 nginx was built with SNI support, however, now it is linked
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
432 dynamically to an OpenSSL library which has no tlsext support,
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
433 therefore SNI is not available
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
434 </programlisting>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
435 </para>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
436
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
437 </section>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
438
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
439
121
49443032011c Unified <section> syntax for "article" and "module" documents.
Ruslan Ermilov <ru@nginx.com>
parents: 98
diff changeset
440 <section id="compatibility" name="Compatibility">
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
441
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
442 <para>
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
443 <list type="bullet">
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
444
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
445 <listitem>
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
446 The SNI support status has been shown by the &ldquo;-V&rdquo; switch
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
447 since 0.8.21 and 0.7.62.
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
448 </listitem>
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
449
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
450 <listitem>
271
4c6d2c614d2c Cleaned up XML tag mess:
Ruslan Ermilov <ru@nginx.com>
parents: 266
diff changeset
451 The <literal>ssl</literal> parameter of the
4c6d2c614d2c Cleaned up XML tag mess:
Ruslan Ermilov <ru@nginx.com>
parents: 266
diff changeset
452 <link doc="ngx_http_core_module.xml" id="listen"/>
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
453 directive has been supported since 0.7.14.
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
454 </listitem>
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
455
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
456 <listitem>
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
457 SNI has been supported since 0.5.32.
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
458 </listitem>
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
459
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
460 <listitem>
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
461 The shared SSL session cache has been supported since 0.5.6.
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
462 </listitem>
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
463
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
464 </list>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
465 </para>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
466
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
467 <para>
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
468 <list type="bullet">
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
469
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
470 <listitem>
314
95d5dc7c9884 Documented the new "TLSv1.1" and "TLSv1.2" parameters of the
Ruslan Ermilov <ru@nginx.com>
parents: 271
diff changeset
471 Version 0.7.65, 0.8.19 and later: the default SSL protocols are SSLv3, TLSv1,
95d5dc7c9884 Documented the new "TLSv1.1" and "TLSv1.2" parameters of the
Ruslan Ermilov <ru@nginx.com>
parents: 271
diff changeset
472 TLSv1.1, and TLSv1.2 (if supported by the OpenSSL library).
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
473 </listitem>
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
474
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
475 <listitem>
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
476 Version 0.7.64, 0.8.18 and earlier: the default SSL protocols are SSLv2,
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
477 SSLv3, and TLSv1.
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
478 </listitem>
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
479
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
480 </list>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
481 </para>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
482
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
483 <para>
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
484 <list type="bullet">
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
485
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
486 <listitem>
43
662995d3e647 Update of SSL ciphers in latest nginx versions.
Igor Sysoev <igor@sysoev.ru>
parents: 42
diff changeset
487 Version 1.0.5 and later: the default SSL ciphers are
271
4c6d2c614d2c Cleaned up XML tag mess:
Ruslan Ermilov <ru@nginx.com>
parents: 266
diff changeset
488 “<literal>HIGH:!aNULL:!MD5</literal>”.
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
489 </listitem>
43
662995d3e647 Update of SSL ciphers in latest nginx versions.
Igor Sysoev <igor@sysoev.ru>
parents: 42
diff changeset
490
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
491 <listitem>
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
492 Version 0.7.65, 0.8.20 and later: the default SSL ciphers are
271
4c6d2c614d2c Cleaned up XML tag mess:
Ruslan Ermilov <ru@nginx.com>
parents: 266
diff changeset
493 “<literal>HIGH:!ADH:!MD5</literal>”.
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
494 </listitem>
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
495
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
496 <listitem>
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
497 Version 0.8.19: the default SSL ciphers are
271
4c6d2c614d2c Cleaned up XML tag mess:
Ruslan Ermilov <ru@nginx.com>
parents: 266
diff changeset
498 “<literal>ALL:!ADH:RC4+RSA:+HIGH:+MEDIUM</literal>”.
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
499 </listitem>
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
500
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
501 <listitem>
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
502 Version 0.7.64, 0.8.18 and earlier: the default SSL ciphers are<br/>
271
4c6d2c614d2c Cleaned up XML tag mess:
Ruslan Ermilov <ru@nginx.com>
parents: 266
diff changeset
503 “<literal>ALL:!ADH:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP</literal>”.
461
6135f3c95bf6 Unified markup for lists.
Ruslan Ermilov <ru@nginx.com>
parents: 393
diff changeset
504 </listitem>
0
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
505
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
506 </list>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
507 </para>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
508
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
509
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
510 </section>
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
511
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
512
61e04fc01027 Initial import of the nginx.org website.
Ruslan Ermilov <ru@nginx.com>
parents:
diff changeset
513 </article>