From owner-freebsd-questions Thu Oct 10 00:01:11 1996 Return-Path: owner-questions Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id AAA24440 for questions-outgoing; Thu, 10 Oct 1996 00:01:11 -0700 (PDT) Received: from gatekeeper.barcode.co.il (gatekeeper.barcode.co.il [192.116.93.17]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id AAA24434 for ; Thu, 10 Oct 1996 00:01:04 -0700 (PDT) Received: (from nadav@localhost) by gatekeeper.barcode.co.il (8.7.5/8.6.12) id IAA18544; Thu, 10 Oct 1996 08:59:03 +0200 (IST) Date: Thu, 10 Oct 1996 08:59:03 +0200 (IST) From: Nadav Eiron To: "Timothy P. Layton, Sr." cc: questions@freebsd.org Subject: Re: popper[186] errors ? In-Reply-To: <199610092250.WAA00223@global-sol.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-questions@freebsd.org X-Loop: FreeBSD.org Precedence: bulk On Wed, 9 Oct 1996, Timothy P. Layton, Sr. wrote: > I am getting this error at my console: > popper[186]:(V2.2) unable to get canonical name of client, err=0. > > What is this telling me ? I'n no popper/sendmail expert. > > Thanks in advance. > Tim- > > -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= > Timothy P. Layton, Sr. > Global Solutions Corporation > ------------------------------------ > Already asked and answered, also RTFM. From man 8 popper: The popper pro- gram initializes and verifies that the peer IP address is registered in the local domain, logging a warning message when a connection is made to a client whose IP address does not have a canonical name. For systems using BSD 4.3 bind, it also checks to see if a cannonical name lookup for the client returns the same peer IP address, logging a warning message if it does not. Or, simply put, popper will check that the client has reverse DNS translation (from IP numbers to host.domain) in the current domain (the same as the one popper is running on). It will also check if translating that name back would give the same IP address. Your message indicates that this lookup failed, probably because your reverse translation is messed up. It's not harmful though. Nadav