From owner-freebsd-net Wed Sep 27 8:49:40 2000 Delivered-To: freebsd-net@freebsd.org Received: from thoth.amduat.net (c500290-a.frndl1.wa.home.com [24.10.38.147]) by hub.freebsd.org (Postfix) with ESMTP id 9CAF237B422 for ; Wed, 27 Sep 2000 08:49:28 -0700 (PDT) Received: from acm.org (osiris.amduat.net [10.0.0.69]) by thoth.amduat.net (8.9.3/8.9.3) with ESMTP id IAA00278 for ; Wed, 27 Sep 2000 08:49:27 -0700 (PDT) (envelope-from jsbarrett@acm.org) Message-ID: <39D21707.BBA56A95@acm.org> Date: Wed, 27 Sep 2000 08:49:27 -0700 From: "Jacob S. Barrett" Reply-To: jbarrett@amduat.net X-Mailer: Mozilla 4.73 [en] (Windows NT 5.0; U) X-Accept-Language: en MIME-Version: 1.0 To: freebsd-net@freebsd.org Subject: ypserv reverse DNS lookup loop Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org I am having a problem with ypserv that I can't seem to solve. It appears to get stuck in a lookup loop on certain reverse DNS lookups that don't resolve. Here is the scenario I think is happening: 1) Mail server gets an email form mailing list and tries to verify the server via revers lookup on the connection IP. 2) Lookup fails on /etc/hosts so it moves to named. 3) Named fails so it asks NIS. (per the /etc/host.conf) 4) NIS server asks its local DNS server who fails and asks the upstream DNS server. 5) Step 4 repeated infinitely. Needless to say this is probably pissing off my ISP. I have patched the problem by removing NIS from the host.conf file but it would be nice to resolve this issue. Does anyone have any ideas as to what may be happening? Do I have a configuration error or something. If you would like to test this on your own machines I will tell you the IP address it always fails with if you request it. Jacob S. Barrett jsbarrett@acm.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message