From owner-freebsd-isp Wed Jan 29 09:14:17 1997 Return-Path: Received: (from root@localhost) by freefall.freebsd.org (8.8.5/8.8.5) id JAA10130 for isp-outgoing; Wed, 29 Jan 1997 09:14:17 -0800 (PST) Received: from mail.futuresouth.com (mail.futuresouth.com [207.141.254.21]) by freefall.freebsd.org (8.8.5/8.8.5) with ESMTP id JAA10108; Wed, 29 Jan 1997 09:14:09 -0800 (PST) Received: from shell.futuresouth.com (shell.futuresouth.com [207.141.254.20]) by mail.futuresouth.com (8.8.3/8.8.3) with ESMTP id LAA24204; Wed, 29 Jan 1997 11:13:21 -0600 (CST) From: Tim Tsai Received: (from tim@localhost) by shell.futuresouth.com (8.8.3/8.8.3) id LAA08073; Wed, 29 Jan 1997 11:13:21 -0600 (CST) Message-Id: <199701291713.LAA08073@shell.futuresouth.com> Subject: reverse DNS problems To: freebsd-questions@freebsd.org Date: Wed, 29 Jan 1997 11:13:21 -0600 (CST) Cc: freebsd-isp@freebsd.org X-Mailer: ELM [version 2.4ME+ PL22 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-isp@freebsd.org X-Loop: FreeBSD.org Precedence: bulk I'm having a problem that my provider is unable to explain. Let me demonstrate by an example: from 207.141.254.20: lynx www.sarc.msstate.edu The connection will be immediate, but it will be 2 minutes before any data is transferred back. telnet/ftp will send the prompt back immediately (we're only 7 hops apart afterall). from outside of 207.141.254.: lynx www.sarc.msstate.edu no slowness problem. from 207.141.254.20: ftp ftp.netbsd.org 10 seconds until the first prompt. from outside of 207.141.254.: ftp ftp.netbsd.org 3 seconds. See the pattern here? Note that this applies to all 207.141.254. machines. Can somebody tell me where to even start tracking down the problem? If it's a reverse DNS lookup problem, is there any utilities/commands that I can run to verify? My provider is handling my primary DNS, by the way. Thanks! Tim