jhewarren / 5final

BCIT COMP 8005 Final Project - Port Forwarding Server

Comp 8005 Computer Systems Technology March 2018 Network and Security Applications Development Final Project

Due

April 9, 1200 hrs. (You may work in groups of two)

Objective:

To design and develop a network application that uses advanced TCP/IP programming techniques. To design and implement a minimum-functionality “Port Forwarder” using any language of your choice. A maximum-functionality port forwarder could include a proxy server, caching, etc.

forward traffic addressed to one port to another requested port on another IP Only TCP is required Load port>IP:port combo from a file handle multiple forwards handle multiple connections on all forwards handle traffic & connection load

Submit

Design, Source, Executable User Manual Test plan & results Present in class

Design

identify required fields; tcp/udp/both, local port, remote port, remote address create config file load config file for each line separate fields spin off thread ->create tunnel(lport,rport,raddr) wait for connection spin off process handle connection close connection

Pseudo

load config for each line spin off process create tunnel listen for connection for each connection request spin off process handle connection close connection kill process

How To

Identify remote machine(s) to connect to Ensure desired port(s) is/are available Edit 'configure' file to reflect forwards (type:local-port:remote-port:remote-address) launch app observe connections status

Test Plan

Load configuration from log file Establish TCP tunnels for all requested ports unable to connect port not avalable [collect and buffer if closed]

Test Cases

Load configuration from file

Create tunnel for requested pairings

Notify if requested port unavailable

Notify if remote connection unavailable

Multiple Clients

Multiple Tunnels

Multiple Clients x Tunnels