Mercurial > hg > nginx-site
annotate xml/en/docs/mail/ngx_mail_auth_http_module.xml @ 1363:82388d3b8e90
Donor added.
author | Maxim Konovalov <maxim@nginx.com> |
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date | Fri, 21 Nov 2014 09:14:07 +0000 |
parents | ebfcd76e23b6 |
children | 06322891b4e3 |
rev | line source |
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1 <?xml version="1.0"?> |
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2 |
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3 <!-- |
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4 Copyright (C) 2006, 2007 Anton Yuzhaninov |
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5 Copyright (C) Nginx, Inc. |
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6 --> |
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7 |
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8 <!DOCTYPE module SYSTEM "../../../../dtd/module.dtd"> |
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9 |
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10 <module name="Module ngx_mail_auth_http_module" |
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11 link="/en/docs/mail/ngx_mail_auth_http_module.html" |
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12 lang="en" |
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13 rev="5"> |
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14 |
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15 <section id="directives" name="Directives"> |
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16 |
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17 <directive name="auth_http"> |
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18 <syntax><value>URL</value></syntax> |
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19 <default/> |
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20 <context>mail</context> |
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21 <context>server</context> |
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22 |
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23 <para> |
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24 Sets the URL of the HTTP authentication server. |
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25 The protocol is described <link id="protocol">below</link>. |
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26 </para> |
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27 |
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28 </directive> |
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29 |
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30 |
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31 <directive name="auth_http_header"> |
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32 <syntax><value>header</value> <value>value</value></syntax> |
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33 <default/> |
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34 <context>mail</context> |
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35 <context>server</context> |
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36 |
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37 <para> |
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38 Appends the specified header to requests sent to the authentication server. |
966 | 39 This header can be used as the shared secret to verify |
40 that the request comes from nginx. | |
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41 For example: |
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42 <example> |
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43 auth_http_header X-Auth-Key "secret_string"; |
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44 </example> |
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45 </para> |
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46 |
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47 </directive> |
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48 |
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49 |
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50 <directive name="auth_http_timeout"> |
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51 <syntax><value>time</value></syntax> |
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52 <default>60s</default> |
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53 <context>mail</context> |
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54 <context>server</context> |
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56 <para> |
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57 Sets the timeout for communication with the authentication server. |
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58 </para> |
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59 |
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60 </directive> |
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61 |
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62 </section> |
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63 |
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64 |
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65 <section id="protocol" name="Protocol"> |
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66 |
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67 <para> |
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68 The HTTP protocol is used to communicate with the authentication server. |
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69 The data in the response body is ignored, the information is passed only in |
966 | 70 the headers. |
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71 </para> |
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72 |
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73 <para> |
966 | 74 Examples of requests and responses: |
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75 </para> |
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76 |
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77 <para> |
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78 Request: |
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79 <example> |
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80 GET /auth HTTP/1.0 |
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81 Host: localhost |
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82 Auth-Method: plain # plain/apop/cram-md5 |
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83 Auth-User: user |
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84 Auth-Pass: password |
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85 Auth-Protocol: imap # imap/pop3/smtp |
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86 Auth-Login-Attempt: 1 |
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87 Client-IP: 192.0.2.42 |
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88 Client-Host: client.example.org |
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89 </example> |
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90 Good response: |
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91 <example> |
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92 HTTP/1.0 200 OK |
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93 Auth-Status: OK |
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94 Auth-Server: 198.51.100.1 |
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95 Auth-Port: 143 |
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96 </example> |
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97 Bad response: |
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98 <example> |
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99 HTTP/1.0 200 OK |
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100 Auth-Status: Invalid login or password |
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101 Auth-Wait: 3 |
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102 </example> |
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103 </para> |
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104 |
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105 <para> |
1046 | 106 If there is no <header>Auth-Wait</header> header, |
966 | 107 an error will be returned and the connection will be closed. |
108 The current implementation allocates memory for each authentication attempt. | |
109 The memory is freed only at the end of a session. | |
110 Therefore, the number of invalid authentication attempts in a single session | |
1046 | 111 must be limited — the server must respond without |
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112 the <header>Auth-Wait</header> header after 10-20 attempts |
966 | 113 (the attempt number is passed in the <header>Auth-Login-Attempt</header> |
114 header). | |
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115 </para> |
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116 |
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117 <para> |
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118 When the APOP or CRAM-MD5 are used, request-response will look as follows: |
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119 <example> |
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120 GET /auth HTTP/1.0 |
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121 Host: localhost |
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122 Auth-Method: apop |
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123 Auth-User: user |
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124 Auth-Salt: <238188073.1163692009@mail.example.com> |
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125 Auth-Pass: auth_response |
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126 Auth-Protocol: imap |
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127 Auth-Login-Attempt: 1 |
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128 Client-IP: 192.0.2.42 |
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129 Client-Host: client.example.org |
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130 </example> |
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131 Good response: |
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132 <example> |
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133 HTTP/1.0 200 OK |
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134 Auth-Status: OK |
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135 Auth-Server: 198.51.100.1 |
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136 Auth-Port: 143 |
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137 Auth-Pass: plain-text-pass |
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138 </example> |
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139 </para> |
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140 |
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141 <para> |
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142 If the <header>Auth-User</header> header exists in the response, |
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143 it overrides the username used to authenticate with the backend. |
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144 </para> |
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145 |
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146 <para> |
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147 For the SMTP, the response additionally takes into account |
966 | 148 the <header>Auth-Error-Code</header> header — if exists, it is used |
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149 as a response code in case of an error. |
966 | 150 Otherwise, the 535 5.7.0 code will be added to |
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151 the <header>Auth-Status</header> header. |
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152 </para> |
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153 |
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154 <para> |
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155 For example, if the following response is received |
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156 from the authentication server: |
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157 <example> |
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158 HTTP/1.0 200 OK |
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159 Auth-Status: Temporary server problem, try again later |
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160 Auth-Error-Code: 451 4.3.0 |
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161 Auth-Wait: 3 |
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162 </example> |
966 | 163 then the SMTP client will receive an error |
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164 <example> |
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165 451 4.3.0 Temporary server problem, try again later |
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166 </example> |
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167 </para> |
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168 |
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169 <para> |
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170 If proxying SMTP does not require authentication, |
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171 the request will look as follows: |
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172 <example> |
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173 GET /auth HTTP/1.0 |
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174 Host: localhost |
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175 Auth-Method: none |
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176 Auth-User: |
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177 Auth-Pass: |
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178 Auth-Protocol: smtp |
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179 Auth-Login-Attempt: 1 |
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180 Client-IP: 192.0.2.42 |
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181 Client-Host: client.example.org |
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182 Auth-SMTP-Helo: client.example.org |
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183 Auth-SMTP-From: MAIL FROM: <> |
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184 Auth-SMTP-To: RCPT TO: <postmaster@mail.example.com> |
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185 </example> |
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186 </para> |
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187 |
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188 </section> |
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189 |
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190 </module> |