author:headsen chentcp
date:2018-06-04 11:20:38ide
notice:This article is created by headsen chen himself and not allowed to copy.or you will count law questions.spa
#啓動 service iptables start chkconfig iptables on 狀況原先的規則 iptables -F #容許特定網段和地址訪問 iptables -I INPUT -s 192.168.1.0/24 -j ACCEPT iptables -I INPUT -s 121.23.45.146 -j ACCEPT iptables -I INPUT -p tcp -s 121.23.45.146 --dport 22 -j ACCEPT iptables -I INPUT -p tcp -s 10.0.0.0/16 --dport 22 -j ACCEPT #內部迴環口 iptables -I OUTPUT -o eth0 -j ACCEPT iptables -I INPUT -i lo -j ACCEPT #默認規則 iptables -P INPUT DROP iptables -P OUTPUT ACCEPT iptables -P FORWARD DROP #容許httpd服務過來訪問 iptables -A INPUT -p tcp --dport 80 -j ACCEPT #容許ping服務 iptables -A INPUT -p icmp --icmp-type 8 -j ACCEPT #容許長鏈接訪問(必須是tcp和udp及其餘協議都容許的,不然光tcp則不行,yum都沒法運行!!!) iptables -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT #限制某個單獨ip訪問 iptables -I INPUT -p tcp -s 146.56.32.147 --dport 80 -j DROP #保存防火牆: service iptables save iptables-save >/bb.txt