iptables打开指定域名
时间: 2023-11-20 22:06:02 浏览: 36
在iptables中打开指定域名需要进行DNS解析,因此你需要使用iptables的扩展模块NFQUEUE来实现,具体操作如下:
1. 安装iptables和python-netfilterqueue:
```
sudo apt-get install iptables python-netfilterqueue
```
2. 添加一个ipset集合:
```
sudo ipset create mydomains hash:ip,port
```
3. 编写一个Python脚本,用于获取指定域名的IP地址并将其添加到ipset集合中:
```python
#!/usr/bin/env python
import socket
import os
from netfilterqueue import NetfilterQueue
# Add your domain names here
domains = ['example.com', 'www.example.com']
# Get IP addresses for the specified domain names
ips = []
for d in domains:
ips += socket.gethostbyname_ex(d)[-1]
# Add the IP addresses to the ipset
for ip in ips:
os.system('sudo ipset add mydomains %s,80' % ip)
# Function to handle the packets in the NFQUEUE
def handle_packet(packet):
pkt = packet.get_payload()
# Check if the packet is TCP and destination port is 80 (HTTP)
if pkt[12:14] == '\x08\x00' and pkt[23] == '\x06' and pkt[36:38] == '\x00\x50':
# Check if the destination IP and port are in the ipset
if pkt[30:34] + ',' + pkt[36:38] in os.popen('sudo ipset list mydomains').read():
# Accept the packet
packet.accept()
else:
# Drop the packet
packet.drop()
# Create a NetfilterQueue object and bind it to the 'iptables' queue
nfqueue = NetfilterQueue()
nfqueue.bind(0, handle_packet)
try:
nfqueue.run()
except KeyboardInterrupt:
pass
# Remove the ipset
os.system('sudo ipset destroy mydomains')
```
4. 运行Python脚本以获取指定域名的IP地址和端口信息,并将其添加到ipset集合中:
```
sudo python myscript.py
```
5. 设置iptables规则,将HTTP流量重定向到NFQUEUE:
```
sudo iptables -A INPUT -p tcp --dport 80 -j NFQUEUE --queue-num 0
```
现在,iptables将只允许指定域名的HTTP流量通过,其他流量将被iptables拒绝。请注意,这仅仅是一个例子,你需要根据你自己的需要进行调整。