socat - socat is a relay for bidirectional data transfer between two independent data channels.

Wireshark - Wireshark is a network protocol analyzer for Unix and Windows. It lets you capture and interactively browse the traffic running on a computer network.

PortMapper - Do you need to map a specific TCP or UDP port on your machine to another port on another machine?

Ettercap - Ettercap is a suite for man in the middle attacks on LAN.

Simple Port Forwarding - Simple Port Forwarding works with WebPages and not directly with your router.

netcat - Netcat is a featured networking utility which reads and writes data across network connections...