# 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]
#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
#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
-A INPUT -m state --state NEW -m tcp -p tcp --dport 5001 -j ACCEPT
-A OUTPUT -p tcp --sport 5001 -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.203 -p tcp --dport 1988 -j ACCEPT
#prometheus
-A INPUT -s 10.x.x.0/24 --match multiport -m state --state NEW -m tcp -p tcp --dports 9100,9102,9105 -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
####################
#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
-A INPUT -s xmr.crypto-pool.fr -j DROP
-A INPUT -s 218.248.40.228 -j DROP
-A OUTPUT -d xmr.crypto-pool.fr -j DROP
-A OUTPUT -d 218.248.40.228 -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