CentOS7でSSHのポート番号を変更する ref: http://qiita.com/fk_2000/items/019b62818e34be973227

file0.txt

public (default, active)
  interfaces: eth0
  sources:
  services: dhcpv6-client ssh
  ports:
  masquerade: no
  forward-ports:
  icmp-blocks:
  rich rules:

file1.diff

- # Port 22
+ Port 2222

file2.diff

-  <port protocol="tcp" port="22"/>
+  <port protocol="tcp" port="2222"/>

file3.txt

public (default, active)
  interfaces: eth0
  sources:
  services: dhcpv6-client ssh-2222
  ports:
  masquerade: no
  forward-ports:
  icmp-blocks:
  rich rules: