Port forwarding between the same machine and different machines with iptables

Iptables forwarding a native 80 port request to port 8080

Iptables-t nat-a prerouting-p tcp--dport 80-j REDIRECT--to-ports 8080

1. If you need this machine to be accessible, you need to configure the output chain:

Iptables-t nat-a output-p tcp-d 127.0.0.1--dport 80-j REDIRECT--to-ports 8080

Port forwarding between two machines

1. Forward all 81 port requests from this machine to 192.168.1.1:80

2. First, you want to enable the IPv4 forwarding feature:

Echo 1 >/proc/sys/net/ipv4/ip_forward

1. or modify/etc/sysctl.conf (via) to enable forwarding after a reboot, then set Iptables (VIA):

Iptables-t nat-a prerouting-p tcp--dport 81-j DNAT--to 192.168.1.1:80 iptables-t nat-a postrouting-j MASQUERADE

1. If the firewall feature is turned on, be careful to turn on both 80 and 812 ports.

10.23.3.129 the forwarding script on the 10.21.1.91 443 port is set up:

#!/bin/sh/sbin/iptables-t Nat-fecho 1 >/proc/sys/net/ipv4/ip_forward/sbin/iptables-t nat-a prerouting-p tcp--d Port 443-j DNAT--to 10.21.1.91:443/sbin/iptables-t nat-a postrouting-j masquerade/sbin/iptables-t nat-l-N

The simplest port forwarding tool under Linux:rinetd"If you think iptables is complicated, use the tools below to be simple"

Website address: http://www.boutell.com/rinetd

This article is from the "Endless Life" blog, make sure to keep this source http://holiday98.blog.51cto.com/2088075/1585817

Port forwarding between the same machine and different machines with iptables