iptables命令

• 关闭所有的INPUT FORWARD OUTPUT命令

iptables -P INPUT DROP
iptables -P FORWARD DROP
iptables -P OUTPUT DROP

• 查看状态列表命令

iptables -L -n
# output like this
Chain INPUT (policy ACCEPT)
target     prot opt source               destination
ACCEPT     udp  --  0.0.0.0/0            0.0.0.0/0            udp dpt:53
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0            tcp dpt:53
ACCEPT     udp  --  0.0.0.0/0            0.0.0.0/0            udp dpt:67
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0            tcp dpt:67
ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0            ctstate RELATED,ESTABLISHED
ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0
INPUT_direct  all  --  0.0.0.0/0            0.0.0.0/0
INPUT_ZONES_SOURCE  all  --  0.0.0.0/0            0.0.0.0/0
INPUT_ZONES  all  --  0.0.0.0/0            0.0.0.0/0
DROP       all  --  0.0.0.0/0            0.0.0.0/0            ctstate INVALID
REJECT     all  --  0.0.0.0/0            0.0.0.0/0            reject-with icmp-host-prohibited

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination
ACCEPT     all  --  0.0.0.0/0            192.168.122.0/24     ctstate RELATED,ESTABLISHED
ACCEPT     all  --  192.168.122.0/24     0.0.0.0/0
ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0
REJECT     all  --  0.0.0.0/0            0.0.0.0/0            reject-with icmp-port-unreachable
REJECT     all  --  0.0.0.0/0            0.0.0.0/0            reject-with icmp-port-unreachable
ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0            ctstate RELATED,ESTABLISHED
ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0
FORWARD_direct  all  --  0.0.0.0/0            0.0.0.0/0
FORWARD_IN_ZONES_SOURCE  all  --  0.0.0.0/0            0.0.0.0/0
FORWARD_IN_ZONES  all  --  0.0.0.0/0            0.0.0.0/0
FORWARD_OUT_ZONES_SOURCE  all  --  0.0.0.0/0            0.0.0.0/0
FORWARD_OUT_ZONES  all  --  0.0.0.0/0            0.0.0.0/0
DROP       all  --  0.0.0.0/0            0.0.0.0/0            ctstate INVALID
REJECT     all  --  0.0.0.0/0            0.0.0.0/0            reject-with icmp-host-prohibited

• 打开某个端口的命令

# 进入
iptables -A INPUT -p tcp --dport 22 -j ACCEPT
# 出去
iptables -A OUTPUT -p tcp --dport 22 -j ACCEPT

• 打开一堆端口的命令

# 进入
iptables -A INPUT -p tcp --dport 30000:31000 -j ACCEPT
# 出去
iptables -A OUTPUT -p tcp --dport 30000:31000 -j ACCEPT

• 关闭端口命令：把打开命令的ACCEPT换成REJECT
• 操作udp协议：把打开命令的tcp换成kcp