Use rinetd in linux to implement port forwarding

Use rinetd in linux to implement port forwarding

This article will share with you a simple and easy-to-use linux tool rinetd to implement port ing, forwarding, and redirection. For more information, see.

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

The Code is as follows:

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:

The Code 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

The Code is as follows:

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

The Code is as follows:

Netstat-antup

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

The Code is as follows:

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.

The above is all the content of this article. I hope you will like it.