# iptables -F

# iptables -P INPUT ACCEPT

# iptables -P OUTPUT ACCEPT

# iptables -P FORWARD ACCEPT

# iptables -A FORWARD -s 124.115.0.0/24 -j DROP

# iptables -I FORWARD -d 202.96.170.164 -j DROP

补充：：

单个IP的命令是

iptables -I INPUT -s 124.115.0.199 -j DROP

封IP段的命令是

iptables -I INPUT -s 124.115.0.0/16 -j DROP

iptables -I INPUT -s 124.115.3.0/16 -j DROP

iptables -I INPUT -s 124.115.4.0/16 -j DROP

封整个段的命令是

iptables -I INPUT -s 124.115.0.0/8 -j DROP

封几个段的命令是

iptables -I INPUT -s 61.37.80.0/24 -j DROP

iptables -I INPUT -s 61.37.81.0/24 -j DROP