----- Original Message ----- From: Philip S Tellis philip.tellis@iname.com Subject: Re: [ILUG-BOM] tcpd thread
Sometime Today, Kishor Bhagwat assembled some asciibets to say:
tcpd can work for UDP also. There is no reason why not. A request comes in, tcpd validates it, and calls the appropriate executable.
udp has no source address, so although tcpd will work, there's no way
it
can do source ip based filtering.
Philip
IP addresess belong below the Transport layer, where TCP and UDP belong. but,if i remember my basics correctly, both TCP and UDP use a pseudo-header for checksums, which has source and destination address information, so there is a mechanism for their 'availability' at the transport layer. so i think source ip filtering would work for both.
regards, kishor
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