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?

Winsock Packet Editor - WPE Pro is a packet editor.

PFConfig - PortForward's PFConfig Software lets you forward ports on any router for any program.

packeth - packeth is GUI and CLI packet generator tool for ethernet.

Robusta Port Forwarder - This tool is created with the primary intention of making it easy to the end user to set forwarding rules in his router....