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O'Reilly - Practical UNIX & Internet Sec... 7015KB

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[Chapter 22] 22.5 UDP Relayer<br />

22.5 UDP Relayer<br />

Chapter 22<br />

Wrappers and Proxies<br />

UDP Relayer is a program written by Tom Fitzgerald that receives UDP packets and retransmits them to<br />

other computers. Like SOCKS, it has a configuration file that allows you to specify which kinds of<br />

packets should be forwarded and which should not. Because UDP is a connectionless protocol, UDP<br />

Relayer must keep track of outgoing packets so that incoming packets can be relayed back to the proper<br />

sender. By default, UDP Relayer remembers outgoing packets for 30 minutes.<br />

At the time of this writing, UDP Relayer was in an early 0.2 Alpha release. A future release is planned,<br />

but that release may or may not occur - especially considering that SOCKS Version 5 will include<br />

support for UDP.<br />

Thus, instead of providing detailed instructions regarding the program's use, we will merely tell you how<br />

to get the program, and then refer you to the program's documentation.<br />

22.5.1 Getting UDP Relayer<br />

UDP Relayer can be freely downloaded from the <strong>Internet</strong>. The address is:<br />

ftp://ftp.wang.com/pub/fitz/udprelay-0.2.tar.Z<br />

In the 0.2 release, the file README contains information on installing the program. The file<br />

ARCHIE-NOTES contains specific information on making UDP Relayer work with Archie.<br />

22.4 SOCKS 22.6 Writing Your Own<br />

Wrappers<br />

[ Library Home | DNS & BIND | TCP/IP | sendmail | sendmail Reference | Firewalls | <strong>Practical</strong> <strong>Sec</strong>urity ]<br />

file:///C|/Oreilly Unix etc/<strong>O'Reilly</strong> Reference Library/networking/puis/ch22_05.htm [2002-04-12 10:45:41]

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