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Mail: connections with wrong ALPN protocols are now rejected.
This is a recommended behavior by RFC 7301 and is useful
for mitigation of protocol confusion attacks [1].
For POP3 and IMAP protocols IANA-assigned ALPN IDs are used [2].
For the SMTP protocol "smtp" is used.
[1] https://alpaca-attack.com/
[2] https://www.iana.org/assignments/tls-extensiontype-values/
author | Vladimir Homutov <vl@nginx.com> |
---|---|
date | Wed, 20 Oct 2021 09:45:34 +0300 |
parents | d620f497c50f |
children |
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# Copyright (C) Igor Sysoev # Copyright (C) Nginx, Inc. ngx_include="unistd.h"; . auto/include ngx_include="inttypes.h"; . auto/include ngx_include="limits.h"; . auto/include ngx_include="sys/filio.h"; . auto/include ngx_include="sys/param.h"; . auto/include ngx_include="sys/mount.h"; . auto/include ngx_include="sys/statvfs.h"; . auto/include ngx_include="crypt.h"; . auto/include