iptables删除策略将删除我的接受规则

时间:2014-05-14 08:41:59

标签: http ssh iptables policy

我已经设置了几个iptables规则,最后我设置了要删除的策略 但是,即使是我的规则也会丢掉所有的东西

iptables -A INPUT  -i lo -j ACCEPT
iptables -A OUTPUT -o lo -j ACCEPT
iptables -A INPUT   -p tcp -s 127.0.0.1 --dport 3306 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT  -p tcp -d 127.0.0.1 --dport 3306 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A INPUT   -p tcp -s x.x.x.x --dport 3306 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT  -s 127.0.0.1 -p tcp -m state --state NEW,ESTABLISHED -m multiport --sports 110,25,143 -j ACCEPT
iptables -A INPUT  -p tcp -s x.x.x.x --dport 3690 -j ACCEPT
iptables -A OUTPUT  -p tcp -s 127.0.0.1 --sport 3690 -j ACCEPT
iptables -A INPUT  -p tcp -s 0/0 --sport 80 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A INPUT -p tcp -s x.x.x.x  --sport 22 --dport 22 -j ACCEPT  

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

但我无法访问我的网站或ssh。请帮助,提前谢谢

Iptables -nvL:

Chain INPUT(策略ACCEPT 3158数据包,285K字节)

pkts bytes target prot opt in out source destination

0     0 ACCEPT     all  --  lo     *       0.0.0.0/0            0.0.0.0/0


0     0 ACCEPT     tcp  --  *      *       127.0.0.1            0.0.0.0/0 

tcp dpt:3306状态NEW,ESTABLISHED

0     0 ACCEPT     tcp  --  *      *       82.115.26.145        0.0.0.0/0            tcp dpt:3306 state NEW,ESTABLISHED

0     0 ACCEPT     tcp  --  *      *       82.115.26.145        0.0.0.0/0            tcp dpt:3690

0     0 ACCEPT     tcp  --  *      *       0.0.0.0/0            0.0.0.0/0            tcp spt:80 state NEW,ESTABLISHED

0     0 ACCEPT     tcp  --  *      *       82.115.26.145        0.0.0.0/0            tcp spt:22 dpt:22

Chain FORWARD(策略ACCEPT 0包,0字节)

pkts bytes target prot opt in out source destination

Chain OUTPUT(策略ACCEPT 1152数据包,160K字节)

pkts bytes target prot opt in out source destination

0     0 ACCEPT     all  --  *      lo      0.0.0.0/0            0.0.0.0/0

0     0 ACCEPT     tcp  --  *      *       0.0.0.0/0            127.0.0.1            tcp dpt:3306 state NEW,ESTABLISHED

0     0 ACCEPT     tcp  --  *      *       127.0.0.1            0.0.0.0/0            state NEW,ESTABLISHED multiport sports 110,25,143


0     0 ACCEPT     tcp  --  *      *       127.0.0.1            0.0.0.0/0  tcp spt:3690

但假设所有链的策略都是DROP

1 个答案:

答案 0 :(得分:0)

你有基本面,但他们有点混淆。 INPUT需要源IP和目标端口,OUTPUT需要目标IP和源端口。进入的流量将为NEWESTABLISHED,从服务器服务(在客户端/服务器设计中)流出的流量将为ESTABLISHED

iptables -A INPUT  -i lo -j ACCEPT
iptables -A OUTPUT -o lo -j ACCEPT

iptables -A INPUT  -p tcp -s x.x.x.x --dport 3306 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -p tcp -d x.x.x.x --sport 3306 -m state --state ESTABLISHED -j ACCEPT

iptables -A INPUT  -p tcp -s x.x.x.x --dport 3690 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -p tcp -d x.x.x.x --sport 3690 -m state --state ESTABLISHED -j ACCEPT

iptables -A INPUT  -p tcp --dport 80 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -p tcp --sport 80 -m state --state ESTABLISHED -j ACCEPT

iptables -A INPUT  -p tcp -s x.x.x.x --dport 22 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -p tcp -d x.x.x.x --sport 22 -m state --state ESTABLISHED -j ACCEPT

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