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Message-ID: <200503101711.j2AHBsuJ017955@turing-police.cc.vt.edu> From: Valdis.Kletnieks at vt.edu (Valdis.Kletnieks@...edu) Subject: Reverse dns On Thu, 10 Mar 2005 09:57:57 CST, Paul Schmehl said: > I've been looking through the RFCs and I can't find it. Some folks think > reverse dns should be completely disabled. I know for sure that this will > break email, because many mail servers won't talk to a server that doesn't > reverse. Tcpdump also doesn't like hosts that won't reverse. "tcpdump -n" is your friend. :) There's no RFC requirement that there be a valid PTR record. Also, note that there's *lots* of games that can be played with PTR records if they happen to be out of a in-addr.arpa zone controlled by the attacker..... -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 226 bytes Desc: not available Url : http://lists.grok.org.uk/pipermail/full-disclosure/attachments/20050310/818c8d2e/attachment.bin
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