socat

socat is a relay for bidirectional data transfer between two independent data channels. Each of these data channels may be a file, pipe, device (serial line etc. or a...

Free Open Source Linux

PortMapper

Do you need to map a specific TCP or UDP port on your machine to another port on another machine? Do you want to limit access to a server on your machine based on the IP...

Free Windows

Simple Port Forwarding

Simple Port Forwarding works with WebPages and not directly with your router. Making it a safe program to use. Its no different than using Firefox, IE or any other browser to setup port forwarding yourself.

Freemium Windows

Albertino/GeoGenSoft Port Mapper

Albertino Port Mapper is a simple NAT-PNP/UPnP port mapper. It can be used to portforward ports automatically. Also you can check if your router support NAT-PNP or UPnP. It can be implemented in releases as external app, credits are must.

Free Windows

Portfwd

Portfwd, Port Forwarding Daemon, stands for port forwarding daemon. It's a small C++ utility which forwards incoming TCP connections and/or UDP packets to remote hosts. FEATURES -- Forwarding of TCP segments.

Free Open Source Windows Linux

AUTAPF

Reliable TCP and UDP port forwarding for Windows. Keeps the data flowing whenever the network is ready. Efficiently forwards many ports at once. Administer locally, or remotely using a Web browser.

Freemium Windows

Komodia Relay

This small utility performs either TCP/UDP/HTTP port forwarding from a source IP and port to another destination IP and port.

Free Open Source Windows