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# sample configuration for iptables service # # you can edit this manually or use system-config-firewall # # please do not ask us to add additional ports/services to this default configuration ################# # NAT # ################# *nat :PREROUTING ACCEPT [27:11935] :INPUT ACCEPT [0:0] :OUTPUT ACCEPT [598:57368] :POSTROUTING ACCEPT [591:57092] :DOCKER - [0:0] #所有内网服务器通过本机上网 #-A POSTROUTING -s 10.x.x.0/24 -p tcp -j SNAT --to-source 0.x.x.x #OpenVPN -A POSTROUTING -o eth0 -s 10.8.0.0/24 -j MASQUERADE #-A PREROUTING -m addrtype --dst-type LOCAL -j DOCKER #-A OUTPUT ! -d 127.0.0.0/8 -m addrtype --dst-type LOCAL -j DOCKER #-A POSTROUTING -s 172.17.0.0/16 ! -o docker0 -j MASQUERADE COMMIT ################# # filter # ################# *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0] #:DOCKER - [0:0] # 这里对已经建立连接的包直接放行，以提高iptables 效率(此条规则通常放在第一条) -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT -A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT #允许ping -A INPUT -p icmp -m state --state ESTABLISHED,RELATED -j ACCEPT #本机设备放行 -A INPUT -i lo -j ACCEPT -A OUTPUT -o lo -j ACCEPT -A INPUT -s 127.0.0.1 -d 127.0.0.1 -j ACCEPT -A OUTPUT -s 127.0.0.1 -d 127.0.0.1 -j ACCEPT #开放sshd服务 -A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT -A OUTPUT -p tcp --sport 22 -m state --state ESTABLISHED -j ACCEPT #为内网机器上网转发 #-A FORWARD -i eth0 -d 10.x.x.0/24 -j ACCEPT #docker #-A INPUT -m state --state NEW -m tcp -p tcp --dport 139291:461018923 -j ACCEPT #-A FORWARD -o docker0 -j DOCKER #-A FORWARD -o docker0 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT #-A FORWARD -i docker0 ! -o docker0 -j ACCEPT #-A FORWARD -i docker0 -o docker0 -j ACCEPT #openvpn -A INPUT -i eth0 -m state --state NEW -p tcp --dport 1194 -j ACCEPT -A OUTPUT -p tcp --sport 1194 -m state --state ESTABLISHED -j ACCEPT #openvpn web ui -A INPUT -i eth0 -m state --state NEW -p tcp --dport 8080 -j ACCEPT -A OUTPUT -p tcp --sport 8080 -m state --state ESTABLISHED -j ACCEPT -A INPUT -i tun+ -j ACCEPT -A FORWARD -i tun+ -j ACCEPT -A FORWARD -i tun+ -o eth0 -m state --state RELATED,ESTABLISHED -j ACCEPT -A FORWARD -i eth0 -o tun+ -m state --state RELATED,ESTABLISHED -j ACCEPT -A OUTPUT -o tun+ -j ACCEPT #SMTP #-A INPUT -m state --state NEW -m tcp -p tcp --dport 25 -j ACCEPT #允许 80 443 端口，http 和 https -A INPUT -i eth0 -m state --state NEW -p tcp --dport 80 -j ACCEPT -A INPUT -i eth0 -m state --state NEW -p tcp --sport 80 -j ACCEPT -A OUTPUT -p tcp --sport 80 -j ACCEPT -A OUTPUT -p tcp --dport 80 -j ACCEPT -A INPUT -i eth0 -m state --state NEW -p tcp --dport 443 -j ACCEPT -A INPUT -i eth0 -m state --state NEW -p tcp --sport 443 -j ACCEPT -A OUTPUT -p tcp --sport 443 -j ACCEPT -A OUTPUT -p tcp --dport 443 -j ACCEPT #dns -A OUTPUT -p udp --dport 53 -j ACCEPT -A INPUT -p udp --sport 53 -j ACCEPT -A INPUT -p udp --dport 53 -j ACCEPT -A OUTPUT -p udp --sport 53 -j ACCEPT #---ganglia的端口---- #ganglia展示web界面、解释php用的apache -A INPUT -m state --state NEW -m tcp -p tcp --dport 81 -j ACCEPT -A OUTPUT -p tcp --sport 81 -m state --state ESTABLISHED -j ACCEPT #ganglia gmond的端口 -A INPUT -p tcp -m multiport --dport 8649:8652 -j ACCEPT -A OUTPUT -p tcp -m multiport --sport 8649:8652 -m state --state ESTABLISHED -j ACCEPT -A INPUT -p udp -m multiport --dport 8649:8652 -j ACCEPT -A OUTPUT -p udp -m multiport --sport 8649:8652 -m state --state ESTABLISHED -j ACCEPT #falcon-agent sent -A OUTPUT -p tcp --dport 6030 -j ACCEPT -A OUTPUT -p tcp --dport 8433 -j ACCEPT -A INPUT -s 10.x.x.x -p tcp --dport 1988 -j ACCEPT #nagios的端口 #-A INPUT -p udp -m multiport --dport 5666,12489 -j ACCEPT #-A OUTPUT -p tcp -m multiport --sport 5666:12489 -m state --state ESTABLISHED -j ACCEPT ###TCP ports for FreeIPA #-A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT #-A INPUT -m state --state NEW -m tcp -p tcp --dport 443 -j ACCEPT #-A INPUT -m state --state NEW -m tcp -p tcp --dport 389 -j ACCEPT #-A INPUT -m state --state NEW -m tcp -p tcp --dport 636 -j ACCEPT #-A INPUT -m state --state NEW -m tcp -p tcp --dport 88 -j ACCEPT #-A INPUT -m state --state NEW -m tcp -p tcp --dport 464 -j ACCEPT #-A INPUT -m state --state NEW -m tcp -p tcp --dport 53 -j ACCEPT ###UDP ports for FreeIPA #-A INPUT -m state --state NEW -m udp -p udp --dport 88 -j ACCEPT #-A INPUT -m state --state NEW -m udp -p udp --dport 464 -j ACCEPT #-A INPUT -m state --state NEW -m udp -p udp --dport 123 -j ACCEPT #-A INPUT -m state --state NEW -m udp -p udp --dport 53 -j ACCEPT # ##nexus yum #-A INPUT -m state --state NEW -m tcp -p tcp --dport 8081 -j ACCEPT #pptp #-A INPUT -m state --state NEW -m tcp -p tcp --dport 1723 -j ACCEPT #处理IP碎片数量,防止攻击,允许每秒100个 -A FORWARD -f -m limit --limit 100/s --limit-burst 100 -j ACCEPT #允许来自外部的ping测试 #-A INPUT -p icmp --icmp-type echo-request -j ACCEPT #禁止ping -A INPUT -p icmp -i eth0 -j DROP #设置ICMP包过滤,允许每秒1个包,限制触发条件是10个包 -A FORWARD -p icmp -m limit --limit 1/s --limit-burst 10 -j ACCEPT ##允许登录者 #sean's home #-A INPUT -s x.x.x.x -m state --state NEW -m tcp -p tcp -j ACCEPT #################### #DROP RULL #################### #丢弃坏的TCP包 #-A FORWARD -p TCP ! --syn -m state --state NEW -j DROP # Reject spoofed packets -A INPUT -s 169.254.0.0/16 -j DROP -A INPUT -s 172.16.0.0/12 -j DROP -A INPUT -s 127.0.0.0/8 -j DROP -A INPUT -s 224.0.0.0/4 -j DROP -A INPUT -d 224.0.0.0/4 -j DROP -A INPUT -s 240.0.0.0/5 -j DROP -A INPUT -d 240.0.0.0/5 -j DROP -A INPUT -s 0.0.0.0/8 -j DROP -A INPUT -d 0.0.0.0/8 -j DROP -A INPUT -d 239.255.255.0/24 -j DROP -A INPUT -d 255.255.255.255 -j DROP # Stop smurf attacks -A INPUT -p icmp -m icmp --icmp-type address-mask-request -j DROP -A INPUT -p icmp -m icmp --icmp-type timestamp-request -j DROP -A INPUT -p icmp -m icmp --icmp-type 8 -j DROP # Drop all invalid packets -A INPUT -m state --state INVALID -j DROP #-A FORWARD -m state --state INVALID -j DROP -A OUTPUT -m state --state INVALID -j DROP -A INPUT -m conntrack --ctstate INVALID -j DROP #drop 3128端口是 squid 的默认端口 -A INPUT -p tcp --dport 3128 -j DROP # Drop excessive RST packets to avoid smurf attacks -A INPUT -p tcp -m tcp --tcp-flags RST RST -m limit --limit 2/second --limit-burst 2 -j ACCEPT # Attempt to block portscans # Anyone who tried to portscan us is locked out for an entire day. -A INPUT -m recent --name portscan --rcheck --seconds 86400 -j DROP -A FORWARD -m recent --name portscan --rcheck --seconds 86400 -j DROP # Once the day has passed, remove them from the portscan list -A INPUT -m recent --name portscan --remove -A FORWARD -m recent --name portscan --remove # These rules add scanners to the portscan list, and log the attempt. -A INPUT -p tcp -m tcp --dport 139 -m recent --name portscan --set -j LOG --log-prefix "Portscan:" -A INPUT -p tcp -m tcp --dport 139 -m recent --name portscan --set -j DROP -A FORWARD -p tcp -m tcp --dport 139 -m recent --name portscan --set -j LOG --log-prefix "Portscan:" -A FORWARD -p tcp -m tcp --dport 139 -m recent --name portscan --set -j DROP #禁止其他未允许的规则访问 #-A INPUT -j REJECT --reject-with icmp-host-prohibited #-A FORWARD -j REJECT --reject-with icmp-host-prohibited -A INPUT -j DROP -A OUTPUT -j DROP -A FORWARD -j DROP COMMIT |
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