MailSSL

This module ensures SSL/TLS support for POP3/IMAP/SMTP. Configuration is practically identical to the configuration of the HTTP SSL module, but checking client certificates is not supported.

这个模块使得POP3／IMAP／SMTP可以使用SSL／TLS.配置已经定义了HTTP SSL模块，但是不支持客户端证书检测。

ssl

syntax:ssl**on | off**

default:ssl off

context:mail, server

Enables SSL/TLS for this virtual server.

在虚拟服务器中启用SSL／TLS

ssl_certificate

syntax:ssl_certificate**file**

default:cert.pem

context:mail, server

Indicates file with the certificate in PEM format for this virtual server. The same file can contain other certificates, and also secret key in PEM format.

显示虚拟服务器上的PEM格式的证书文件。同一文件可以包含其他的证书和包含PEM格式的安全码。

ssl_certificate_key

syntax:ssl_certificate_key**file**

default:cert.pem

context:mail, server

Indicates file with the secret key in PEM format for this virtual server.

显示虚拟服务器中PEM格式的安全码文件

ssl_ciphers

syntax:ssl_ciphers file**ciphers**

default:ALL:!ADH:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP

context:mail, server

Directive describes the permitted ciphers. Ciphers are assigned in the formats supported by OpenSSL.

指令描述了容许的SSL chiphers.chiphers都被使用了OpenSSL支持的格式.

ssl_prefer_server_ciphers

syntax:ssl_prefer_server_ciphers**on | off**

default:off

context:mail, server

Requires protocols SSLv3 and TLSv1 server ciphers be preferred over the client's ciphers.

需要SSLv3协议,TLSv1 服务器端米阿么优先于客户端密码

ssl_protocols

syntax:ssl_protocols**[SSLv2] [SSLv3] [TLSv1]**

default:SSLv2 SSLv3 TLSv1

context:mail, server

Directive enables the protocols indicated.

指令显示协议

ssl_session_cache

syntax:ssl_session_cache**[builtin[:size [shared:name:size]**

default:builtin:20480

context:mail, server

The directive sets the types and sizes of caches to store the SSL sessions.

指令设置了类型和存储SSL 会话的缓存的大小.

The cache types are:

缓存类型为：

  • builtin — the OpenSSL builtin cache, is used inside one worker process only. The cache size is assigned in the number of the sessions.

builtin — OpenSSL内部缓存,这个只在内部工作进程中被使用.这个缓存大小等同于会话的个数。

  • shared — the cache is shared between all worker processes. The size of cache is assigned in the bytes, 1 MB cache can contain about 4000 sessions. Each shared cache must have arbitrary name. Cache with the same name can be used in several virtual servers.

shared — 这个缓存被所有工作进程共享.这个缓存大小用字节标识,1M缓存可以包含大约4000个会话。每个共享缓存都有专有的名称。相同名称的缓存可以被多个服务器使用。

It is possible to use both types of cache simultaneously, for example:

可能同时使用2中类型的缓存，例如

  1. ssl_session_cache  builtin:1000  shared:SSL:10m;

However, the only shared cache usage without that builtin should be more effective.

然而，共享缓存只有在内部缓存之外使用才能产生更好的效果。

ssl_session_timeout

syntax:ssl_session_timeout**time**

default:5m

context:mail, server

Assigns the time during which the client can repeatedly use the parameters of the session, which is stored in the cache.

在使用中客户端重复使用的会话参数被存储在缓存中。

starttls

syntax:starttls on | off | only

default:off

context:mail, server

  • on - permit the use of commands STLS for POP3 and STARTTLS for IMAP/SMTP

on - 容许在POP3中的STLS命令和IMAP／SMPT中的STARTTLS命令

  • off - do not allow command STLS/STARTTLS

不容许 STLS／STARTTLS命令

  • only - announce STLS/STARTTLS support and require that clients use TLS encryption

only - 宣布支持 STLS／STARTTLS但是需要客户端使用TLS加密