[tag]mail server, moving, redundancy[/tag]
This week I made a plan to achieve no interruption to mail service. In prevenient BLOG, I had descripted the steps to do it. But now I have another easy way to Continue reading
Tags: mail-server, moving, redundancyCNC网络城域网改造，公司IP要变更。为了不影响在DNS生效期间造成的MAIL server问题，特制定备份方案。
新的IP为4.3.2.1
1.在CTC DC准备一台有公网的机器1.2.3.4,上装sendmail，配置relay-domains: abc.com. 配置其自身的DNS domain abc.com的MX 记录为mail.abc.com A 4.3.2.1
2.在更改IP的前两天注册低优先级的MX记录mx.abc.com使其有A记录1.2.3.4
3.在切割之时更改abc.com的MX记录，使其指向新的IP
4.两天之后恢复正常，在这两天之内所有员工收发邮件可用4.3.2.1.但并不影响其它人给本公司员工发MAIL Continue reading
第一部分 mail relay规则详解
一. 软件环境：Sendmail 8.9.3
二. 默认情况下的relay规则
在默认情况下,也就是安装完系统(Sendmail服务器)不做任何设置的情况下,则只能在本机上收发邮件, 网络上(局域网或Internet)的任何其它主机不能向该SMTP服务器发送邮件,若希望能实现发送,则需满足下面的任何一个条件即可(不需要同时满足):1. 发送者身份属于“本地或者被允许的发送者”。 Continue reading
The other days I encountered one problem with cisco PIX 515E. Every 24 hours the FW box would rebooted automatically. At last I found its caused by the license. CISCO license about PIX series has three Continue reading
Tags: license, PIX