linux防火墙
默认的配置文件是：/etc/sysconfig/iptables
# Generated by iptables-save v1.4.1.1 on Mon Jan 12 11:55:02 2009*filter:INPUT DROP :FORWARD ACCEPT :OUTPUT ACCEPT -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT-A INPUT -i lo -j ACCEPT# -A INPUT -s 64.1.215.166 -j DROP -A INPUT -p icmp -j ACCEPT -A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT-A INPUT -p tcp -m state --state NEW -m tcp --dport 80-j ACCEPT# -A INPUT -p tcp -m state --state NEW -m tcp --dport 25-j ACCEPT-A INPUT -p tcp -m state --state NEW -m tcp --dport 3306 -s 121.229.106.210-j ACCEPT-A INPUT -p tcp -m state --state NEW -m tcp --dport 3690 -s 121.229.106.210-j ACCEPT-A INPUT -j REJECT --reject-with icmp-host-prohibited-A FORWARD -j REJECT --reject-with icmp-host-prohibitedCOMMIT# Completed on Mon Jan 12 11:55:02 2009
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