帮加注一条:是外网通过外网IP的机器的SSH来控制内网的N台SSH
形如:
[root@RHEL4 ~]# iptables -t nat -nL
Chain PREROUTING (policy ACCEPT)
target prot opt source destination
DNAT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:22 to:192.168.1.4:22
DNAT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:22 to:192.168.1.5:22