Use rinetd for port forwarding in CentOS

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 pkillrinetd is used to close the process.

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

Download, decompress, and install the software

 
 

  
  
wgethttp://www.boutell.com/rinetd/http/rinetd.tar.gz
  
  
tarzxvfrinetd.tar.gz
  
  
make
  
  
makeinstall
 
 

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

[Root @ localhostiso] # cat/etc/rinetd. conf

 
 

  
  
1.1.1.1112.2.2.13389
  
  
1.1.1.1122.2.2.23389
  
  
1.1.1.1132.2.2.322
  
  
1.1.1.1142.2.2.480
  
  
allow*.*.*.*
  
  
logfile/var/log/rinetd.log
 
 

Start the program
Pkillrinetd # 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-tnat-APREROUTING-ieth0-ptcp–dport2533-jDNAT–to192.168.1.88:80
  
  
iptables-tnat-APOSTROUTING-oeth0-s192.168.1.88-ptcp–sport80-jSNAT–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.