# iptables

```
需开启ip转发功能
>vim /etc/sysctl.conf设置net.ipv4.ip_forward=1
```

![image](https://raw.githubusercontent.com/xiaoy-sec/Pentest_Note/master/img/179.png) ![image](https://raw.githubusercontent.com/xiaoy-sec/Pentest_Note/master/img/180.png)

```
本地端口22转发到2222上
>iptables -t nat -A PREROUTING -p tcp --dport 2222 -j REDIRECT --to-ports 22
内网98机器3389转到本机110的6789上
>iptables -t nat -A PREROUTING -d 192.168.0.110 -p tcp --dport 6789 -j DNAT --to-destination 192.168.0.98:3389
>iptables -t nat -A POSTROUTING -d 192.168.0.98 -p tcp --dport 3389 -j SNAT --to 192.168.0.110
```

![image](https://raw.githubusercontent.com/xiaoy-sec/Pentest_Note/master/img/181.png)

```
查看规则
>iptables -t nat -L
删除规则
>iptables -t nat -D PREROUTING 1
删除全部规则
>iptables -t nat –F
```


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