Linux System port mapping (route forwarding)

The first thing to do is the/etc/sysctl.conf configuration file Net.ipv4.ip_forward = 1 default is 0.
This allows Iptalbes FORWARD.

Vi/etc/sysconfig/iptables adding *nat Segments

*nat
:P rerouting ACCEPT [0:0]
:P ostrouting ACCEPT [0:0]
: OUTPUT ACCEPT [0:0]

-A prerouting-d 202.168.349.101-p tcp--dport 16688-j DNAT--to-destination 192.168.2.35:16688
-A postrouting-d 192.168.2.35-p tcp--dport 16688-j SNAT--to 192.168.2.55

COMMIT

Among them, the 202.168.349.101 for the external network ip,192.168.2.35 for the intranet ip,16688 as the port to do forwarding, 192.168.2.55 for forwarding to the destination IP

Restart Iptables

Service Iptables Restart

Test forwarding

Telnet 192.168.2.35 16688

This article is from the "Guangzhou Linux operation and Maintenance" blog, please be sure to keep this source http://milenovo.blog.51cto.com/10554394/1719318

Linux System port mapping (route forwarding)