From owner-freebsd-hackers@FreeBSD.ORG Mon Sep 8 13:30:04 2003 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id BFF4F16A4BF for ; Mon, 8 Sep 2003 13:30:04 -0700 (PDT) Received: from srv1.cosmo-project.de (srv1.cosmo-project.de [213.83.6.106]) by mx1.FreeBSD.org (Postfix) with ESMTP id 5527543FE0 for ; Mon, 8 Sep 2003 13:30:01 -0700 (PDT) (envelope-from andreas@klemm.apsfilter.org) Received: from srv1.cosmo-project.de (localhost [IPv6:::1]) by srv1.cosmo-project.de (8.12.9/8.12.9) with ESMTP id h88KTxQw040993 (version=TLSv1/SSLv3 cipher=EDH-RSA-DES-CBC3-SHA bits=168 verify=NO); Mon, 8 Sep 2003 22:29:59 +0200 (CEST) (envelope-from andreas@klemm.apsfilter.org) Received: (from uucp@localhost)h88KTw5M040992; Mon, 8 Sep 2003 22:29:58 +0200 (CEST) (envelope-from andreas@klemm.apsfilter.org) Received: from titan.klemm.apsfilter.org (localhost.klemm.apsfilter.org [127.0.0.1]) by klemm.apsfilter.org (8.12.9/8.12.9) with ESMTP id h88KRXpC050014; Mon, 8 Sep 2003 22:27:33 +0200 (CEST) (envelope-from andreas@titan.klemm.apsfilter.org) Received: (from andreas@localhost) by titan.klemm.apsfilter.org (8.12.9/8.12.9/Submit) id h88KRRtw050013; Mon, 8 Sep 2003 22:27:28 +0200 (CEST) Date: Mon, 8 Sep 2003 22:27:27 +0200 From: Andreas Klemm To: Bruce M Simpson , freebsd-hackers@freebsd.org Message-ID: <20030908202727.GA49862@titan.klemm.apsfilter.org> References: <3F589E94.1080508@xwave.com> <20030905154646.GA59881@rot13.obsecurity.org> <20030906213428.GF29217@spc.org> <3F5A8FDB.3050507@newsguy.com> <20030907015510.GG29217@spc.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20030907015510.GG29217@spc.org> X-Operating-System: FreeBSD 5.1-CURRENT X-Disclaimer: A free society is one where it is safe to be unpopular User-Agent: Mutt/1.5.4i Subject: Re: PUzzling sshd behaviour X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 08 Sep 2003 20:30:04 -0000 On Sun, Sep 07, 2003 at 02:55:10AM +0100, Bruce M Simpson wrote: > On Sat, Sep 06, 2003 at 10:54:35PM -0300, Daniel C. Sobral wrote: > > Bruce M Simpson wrote: > > >On Fri, Sep 05, 2003 at 08:46:46AM -0700, Kris Kennaway wrote: > > >>The fact that sshd requires reverse IP resolution is well-known > > >>behaviour. It's probably the most common FAQ about sshd ("Why is my > > >>login taking 60 seconds to present the password prompt?"). > > > > > >But what about: > > > VerifyReverseMapping > > > Specifies whether sshd should try to verify the remote host > > > name > > > and check that the resolved host name for the remote IP > > > address > > > maps back to the very same IP address. The default is ``no''. > > > > AFAIK, that means the reverse mapping result will not be held against > > you. :-) > > This sounds like a bug. Does anyone else agree? Yes and I really needed this functionality in a project for 12 Suns... But it didn't work as expected from the description. And for me a functionality like being able to prevent reverse lookup would be completely logical ... Result was to create about 20 /etc/hosts entries on every sun, to prevent this 60 seconds timeout for our Out Of Band login via VPN and from sun to sun etc etc Andreas /// -- Andreas Klemm - Powered by FreeBSD 5.1-CURRENT Need a magic printfilter today ? -> http://www.apsfilter.org/