1 gaibiandu回复

(3 篇回复，发表在 iRedMail 技术支持)

有没有比较好的方式来限制对方尝试的次数而不影响系统，谢谢。

ZhangHuangbin 写道:

只表明：有人尝试连接你的服务器，但没有完成完整的 smtp 会话就断开连接了。

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2 gaibiandu发表

(3 篇回复，发表在 iRedMail 技术支持)

==== 必填信息。没有填写将不予回复 ====
- iRedMail 版本号：0.94
- 使用哪个数据库存储用户帐号（OpenLDAP，MySQL，PostgreSQL）：MySQL
- 使用的 Linux/BSD 发行版名称及版本号：Ubuntu14.04
- 与您的问题相关的日志信息：/var/log/mail.log
====
出现大量的日志  平均 2-3秒一条，最近几天出现
May 22 06:52:35 mail postfix/submission/smtpd[21651]: lost connection after CONNECT from unknown[unknown]
May 22 06:52:35 mail postfix/submission/smtpd[21651]: disconnect from unknown[unknown]
May 22 06:52:37 mail postfix/submission/smtpd[21651]: connect from unknown[unknown]
May 22 06:52:37 mail postfix/submission/smtpd[21651]: lost connection after CONNECT from unknown[unknown]
May 22 06:52:37 mail postfix/submission/smtpd[21651]: disconnect from unknown[unknown]
May 22 06:52:41 mail postfix/submission/smtpd[21651]: connect from unknown[unknown]
May 22 06:52:41 mail postfix/submission/smtpd[21651]: lost connection after CONNECT from unknown[unknown]
May 22 06:52:41 mail postfix/submission/smtpd[21651]: disconnect from unknown[unknown]
May 22 06:52:43 mail postfix/submission/smtpd[21651]: connect from unknown[unknown]
May 22 06:52:43 mail postfix/submission/smtpd[21651]: lost connection after CONNECT from unknown[unknown]
May 22 06:52:43 mail postfix/submission/smtpd[21651]: disconnect from unknown[unknown]
May 22 06:52:47 mail postfix/submission/smtpd[21651]: connect from unknown[unknown]
May 22 06:52:47 mail postfix/submission/smtpd[21651]: lost connection after CONNECT from unknown[unknown]
May 22 06:52:47 mail postfix/submission/smtpd[21651]: disconnect from unknown[unknown]
May 22 06:52:49 mail postfix/submission/smtpd[21651]: connect from unknown[unknown]
May 22 06:52:49 mail postfix/submission/smtpd[21651]: lost connection after CONNECT from unknown[unknown]
May 22 06:52:49 mail postfix/submission/smtpd[21651]: disconnect from unknown[unknown]
May 22 06:52:53 mail postfix/submission/smtpd[21651]: connect from unknown[unknown]
May 22 06:52:53 mail postfix/submission/smtpd[21651]: lost connection after CONNECT from unknown[unknown]
May 22 06:52:53 mail postfix/submission/smtpd[21651]: disconnect from unknown[unknown]
May 22 06:52:55 mail postfix/submission/smtpd[21651]: connect from unknown[unknown]
May 22 06:52:55 mail postfix/submission/smtpd[21651]: lost connection after CONNECT from unknown[unknown]
May 22 06:52:55 mail postfix/submission/smtpd[21651]: disconnect from unknown[unknown]
May 22 06:52:59 mail postfix/submission/smtpd[21651]: connect from unknown[unknown]
May 22 06:52:59 mail postfix/submission/smtpd[21651]: lost connection after CONNECT from unknown[unknown]
May 22 06:52:59 mail postfix/submission/smtpd[21651]: disconnect from unknown[unknown]
May 22 06:53:01 mail postfix/submission/smtpd[21651]: connect from unknown[unknown]
May 22 06:53:01 mail postfix/submission/smtpd[21651]: lost connection after CONNECT from unknown[unknown]
May 22 06:53:01 mail postfix/submission/smtpd[21651]: disconnect from unknown[unknown]
May 22 06:53:05 mail postfix/submission/smtpd[21651]: connect from unknown[unknown]
May 22 06:53:05 mail postfix/submission/smtpd[21651]: lost connection after CONNECT from unknown[unknown]
May 22 06:53:05 mail postfix/submission/smtpd[21651]: disconnect from unknown[unknown]
May 22 06:53:07 mail postfix/submission/smtpd[21651]: connect from unknown[unknown]
May 22 06:53:07 mail postfix/submission/smtpd[21651]: lost connection after CONNECT from unknown[unknown]
May 22 06:53:07 mail postfix/submission/smtpd[21651]: disconnect from unknown[unknown]
May 22 06:53:11 mail postfix/submission/smtpd[21651]: connect from unknown[unknown]

请问大概有那些原因会造成这个问题

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3 gaibiandu发表

(1 篇回复，发表在 iRedMail 技术支持)

==== 必填信息。没有填写将不予回复 ====
- iRedMail 版本号：0.94
- 使用哪个数据库存储用户帐号（OpenLDAP，MySQL，PostgreSQL）：MySQL
- 使用的 Linux/BSD 发行版名称及版本号：Centos6.4
- 与您的问题相关的日志信息：
====
新手，刚接手邮件服务器。
发信部分：
安装完成后使用默认配置
smtpd_tls_auth_only=yes
依然可以使用 25号端口发送邮件

收信部分：
disable_plaintext_auth=yes
ssl=required

假如使用110或者143端口，正常出现错误提示
Plaintext authentication disallowed on non-secure (SSL/TLS) connection

谢谢各位！

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