vim /etc/sysconfig/iptables
# Generated by iptables-save v1.4.7 on Mon Sep 19 17:12:21 2016
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [86:9346]
-A INPUT -p udp -m udp --dport 2200 -j ACCEPT
-A INPUT -p udp -m udp --dport 2100 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 2100 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 80 -j ACCEPT
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A INPUT -p udp -m state --state NEW -m udp --dport 2100 -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT
-A INPUT -p udp -m udp --dport 80 -j ACCEPT
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT
# Completed on Mon Sep 19 17:12:21 2016

注意
自己新增的规则尽量靠前设置，我试过几次，将自己的规则放在后面不生效,应该是转发的原因!