Use rinetd for port forwarding in CentOS

In windows, port forwarding usually uses the built-in nat and rinetd programs for port forwarding ing in porttunnel and portmaplinux. The start method is rinetd-c/etc/rinetd. conf, pkillrinetd shut down the process tool home page: http://www.boutell.com/rinetd/software download, decompress and install WG

In windows, port forwarding generally uses built-in nat, porttunnel, and portmap.

The port forwarding ing program in linux is rinetd. The start method is rinetd-c/etc/rinetd. conf, and pkill rinetd to close the process.

Tools home: http://www.boutell.com/rinetd/

Download, decompress, and install the software

 
 

  
  
wget http://www.boutell.com/rinetd/http/rinetd.tar.gz  
  
  
tar zxvf rinetd.tar.gz  
  
  
make  
  
  
make install 
 
 

Map Port 11 of 1.1.1.1 to port 3389 of 2.2.2.2. the configuration file is as follows:

[Root @ localhost iso] # cat/etc/rinetd. conf

 
 

  
  
1.1.1.1 11 2.2.2.1 3389  
  
  
1.1.1.1 12 2.2.2.2 3389  
  
  
1.1.1.1 13 2.2.2.3 22  
  
  
1.1.1.1 14 2.2.2.4 80  
  
  
allow *.*.*.*  
  
  
logfile /var/log/rinetd.log 
 
 

Start the program
Pkill rinetd # shut down the process
Rinetd-c/etc/rinetd. conf # start forwarding
Add this command to/etc/rc. local to run automatically upon startup.

View status
Netstat-antup

This article from the Linux community website (www.linuxidc.com) original link: http://www.linuxidc.com/Linux/2011-01/31287.htm

 

If you want to use iptables, you can use the following command.

 
 

  
  
WAN_IP=”202.106.0.20″  
  
  
iptables -t nat -A PREROUTING -i eth0 -p tcp ?dport 2533 -j DNAT ?to 192.168.1.88:80  
  
  
iptables -t nat -A POSTROUTING -o eth0 -s 192.168.1.88 -p tcp ?sport 80 -j SNAT ?to $WAN_IP:2533 
 
 

The first sentence defines a variable.
The second sentence is to forward requests with Port 2533 to port 80 of 192.168.1.88.
Third, modify the source address output from etho to 192.168.1.88, and the source address of the packet with Port 80 to Port 2533 of the local machine so that the recipient can receive
The data packet can be returned correctly.