yum install iptables iptables-services
systemctl start iptables
iptables -A INPUT -s 86.106.181.76 -j DROP
iptables -A INPUT -s 86.106.181.76 -j REJECT
iptables -A OUTPUT -s 86.106.181.76 -j DROP
iptables -A OUTPUT -s 86.106.181.76 -j REJECT
iptables -A INPUT -s 185.170.213.251 -j DROP
iptables -A INPUT -s 185.170.213.251 -j REJECT
iptables -A OUTPUT -s 185.170.213.251 -j DROP
iptables -A OUTPUT -s 185.170.213.251 -j REJECT
[root@host49 ~]# service iptables save
iptables: Saving firewall rules to /etc/sysconfig/iptables:[ 确定
iptables -nL --line-numbe
iptables v1.4.21
Usage: iptables -[ACD] chain rule-specification [options]
iptables -I chain [rulenum] rule-specification [options]
iptables -R chain rulenum rule-specification [options]
iptables -D chain rulenum [options]
iptables -[LS] [chain [rulenum]] [options]
iptables -[FZ] [chain] [options]
iptables -[NX] chain
iptables -E old-chain-name new-chain-name
iptables -P chain target [options]
iptables -h (print this help information)
-[ACD ] -A append -C check -D delete
-I insert
-L list
-S --list-rules
-F flush
Option
-s source
-p protocol
-d destination
-i in-interface
-j jump
