Linux下架构安全邮件服务器之Sendmail(5)

日期：2020-10-05 栏目：程序人生浏览：次

二、sina.com配置：

把163.com主机配置，克隆一份，进行相应修改即可！

注意：克隆前必须把电源关掉

如果sendmail启动比较慢，可以在1级别进行修改！（出现红色界面：按b e 末尾输入1）

1.手动配置ip

[root@mail ~]# vim /etc/sysconfig/network-scripts/ifcfg-eth0
[root@mail ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
# Advanced Micro Devices [AMD] 79c970 [PCnet32 LANCE]
DEVICE=eth0
BOOTPROTO=none
ONBOOT=yes
HWADDR=00:0c:29:5b:98:33
NETMASK=255.255.255.0
IPADDR=192.168.10.9
TYPE=Ethernet

2.修改dns 配置

[root@mail etc]# vim named.conf //5个any
[root@mail etc]# vim named.rfc1912.zones

[root@mail named]# pwd
/var/named/chroot/var/named
[root@mail named]# cp -p 163.com.zone sina.com.zone
[root@mail named]# vim sina.com.zone

dns指向
[root@mail ~]# vim /etc/resolv.conf
[root@mail ~]# cat /etc/resolv.conf
search domain.org
nameserver 192.168.10.9

3.修改主机名
[root@mail ~]# vim /etc/sysconfig/network
[root@mail ~]# cat /etc/sysconfig/network
NETWORKING=yes
NETWORKING_IPV6=yes
HOSTNAME=mail.sina.com

[root@mail ~]# hostname
mail.163.com //发现名字并没有改变过来

需要重启，如果不想重启，只需重命名后，重新登录即可！
[root@mail ~]# hostname mail.sina.com //重命名

4.修改sendmail配置

[root@mail mail]# vim sendmail.mc

116 行，任意地址都可以telnet上该主机的25端口
[root@mail mail]# vim access

sendmail服务重启
[root@mail ~]# service sendmail status
sendmail is stopped
[root@mail ~]# service sendmail restart
Shutting down sendmail:                                    [FAILED]
Starting sendmail:                                         [ OK ]
Starting sm-client:                                        [ OK ]
5.查看接收服务器端口：
[root@mail ~]# netstat -tupln |grep dovecot
tcp        0      0 :::993                      :::*                        LISTEN      3166/dovecot
tcp        0      0 :::995                      :::*                        LISTEN      3166/dovecot
tcp        0      0 :::110                      :::*                        LISTEN      3166/dovecot
tcp        0      0 :::143                      :::*                        LISTEN      3166/dovecot
You have mail in /var/spool/mail/root

6.查看账号：

[root@mail ~]# tail /etc/passwd
nfsnobody:x:65534:65534:Anonymous NFS User:/var/lib/nfs:/sbin/nologin
sshd:x:74:74:Privilege-separated SSH:/var/empty/sshd:/sbin/nologin
haldaemon:x:68:68:HAL daemon:/:/sbin/nologin
gdm:x:42:42::/var/gdm:/sbin/nologin
avahi-autoipd:x:100:103:avahi-autoipd:/var/lib/avahi-autoipd:/sbin/nologin
sabayon:x:86:86:Sabayon user:/home/sabayon:/sbin/nologin
named:x:25:25:Named:/var/named:/sbin/nologin
user1:x:500:500::/home/user1:/bin/bash
user2:x:501:501::/home/user2:/bin/bash
dovecot:x:97:97:dovecot:/usr/libexec/dovecot:/sbin/nologin

彻底删除这两个帐号！
[root@mail ~]# userdel -r user1
[root@mail ~]# userdel -r user2

创建新账号：
[root@mail ~]# useradd user3
[root@mail ~]# passwd 设置密码
Changing password for user root.
New UNIX password:
BAD PASSWORD: it is WAY too short
Retype new UNIX password:
passwd: all authentication tokens updated successfully.
[root@mail ~]# useradd user4
[root@mail ~]# passwd
Changing password for user root.
New UNIX password:
BAD PASSWORD: it is WAY too short
Retype new UNIX password:
passwd: all authentication tokens updated successfully.

7.所有服务重启