看到个iptables的脚本，谁来帮忙翻一下 - 全球主机交流论坛

#!/bin/bash
PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
export PATH
echo "============================iptables configure============================================"
#get sshd port
if grep "^Port" /etc/ssh/sshd_config>/dev/null;then
sshdport=`grep "^Port" /etc/ssh/sshd_config | sed "s/Port\s//g" `
else
sshdport=22
fi
IPT="/sbin/iptables"
$IPT --delete-chain
$IPT --flush
$IPT -P INPUT DROP
$IPT -P FORWARD DROP
$IPT -P OUTPUT DROP
$IPT -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
$IPT -A INPUT -p tcp -m tcp --dport 80 -j ACCEPT
$IPT -A INPUT -p tcp -m tcp --dport $sshdport -j ACCEPT
$IPT -A INPUT -i lo -j ACCEPT
$IPT -A INPUT -p icmp -m icmp --icmp-type 8 -j ACCEPT
$IPT -A INPUT -p icmp -m icmp --icmp-type 11 -j ACCEPT
$IPT -A OUTPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
$IPT -A OUTPUT -p udp -m udp --dport 53 -j ACCEPT
$IPT -A OUTPUT -o lo -j ACCEPT
$IPT -A OUTPUT -p tcp -m tcp --dport 80 -j ACCEPT
$IPT -A OUTPUT -p tcp -m tcp --dport 25 -j ACCEPT
$IPT -A OUTPUT -p icmp -m icmp --icmp-type 8 -j ACCEPT
$IPT -A OUTPUT -p icmp -m icmp --icmp-type 11 -j ACCEPT
service iptables save
service iptables restart
echo "============================iptables configure completed============================================"

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