SOCKS5-based firewall support for UDP-based application

Pao Yue-kong Library Electronic Theses Database

SOCKS5-based firewall support for UDP-based application


Author: Fung, King-pong
Title: SOCKS5-based firewall support for UDP-based application
Degree: M.Sc.
Year: 1999
Subject: TCP/IP (Computer network protocol)
Computer network protocols
Computer networks
Hong Kong Polytechnic University -- Dissertations
Department: Multi-disciplinary Studies
Dept. of Computing
Pages: v, 82 leaves : ill. ; 30 cm
Language: English
InnoPac Record:
Abstract: At present, firewalls are mostly designed for outgoing traffic or for some well-known incoming application protocol such as http, ftp or smtp. But there is no generic way of accepting incoming UDP traffic via a firewall. This project aims to provide a generic mechanism for all UDP-based protocol to traverse through a firewall. The transport proxy protocol SOCKS5 model is adopted as the foundation for development. To achieve this, an enhancement to the SOCKS5 protocol is proposed. This enhanced SOCKS5 protocol will support the establishment of incoming UDP association via a SOCKS5-based firewall. It will resolve the issues with the current SOCKS5 protocol support for incoming UDP traffic. The enhanced SOCKS5 protocol will also support the outgoing UDP traffic via the SOCKS5-based firewall. A prototype for the enhanced SOCKS5 protocol was implemented by using the existing source code for SOCKS5. The Real Time Streaming Protocol(RTSP) application, which is using UDP for delivering multimedia stream, is used to test the enhanced SOCKS5 protocol. The testing was found to be successful. This enhanced SOCKS5 protocol will provide secure traversal of all UDP traffic through the SOCKS5-based firewall which will be transparent to the applications layer.

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