查看端口是否对外开放
/etc/init.d/iptables status# /etc/init.d/iptables status
表格：filter
Chain INPUT (policy ACCEPT)
num target prot opt source destination
1 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:3306
2 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0
3 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED
4 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:22
5 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:80
6 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:443
7 DROP tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:3306
8 ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0 icmp type 8
9 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED
10 ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0
11 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0
12 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:22
13 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited
Chain FORWARD (policy ACCEPT)
num target prot opt source destination
1 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited
Chain OUTPUT (policy ACCEPT)
num target prot opt source destination
You have new mail in /var/spool/mail/root
# /e
