Date: Sun, 27 Nov 2005 17:09:25 -0800 From: James Long <list@museum.rain.com> To: freebsd-questions@freebsd.org Cc: Lowell Gilbert <freebsd-questions-local@be-well.ilk.org> Subject: Re: How to have sshd log IP numbers instead of reverse lookups Message-ID: <20051128010925.GA95412@ns.museum.rain.com> In-Reply-To: <44y83bphn1.fsf@be-well.ilk.org> References: <20051125035711.GA58357@ns.museum.rain.com> <44y83bphn1.fsf@be-well.ilk.org>
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On Sat, Nov 26, 2005 at 10:12:50AM -0500, Lowell Gilbert wrote: > James Long <list@museum.rain.com> writes: > > > I was looking at /var/log/auth.log and saw an entry of the form: > > > > Nov 24 18:41:37 ns sshd[58083]: error: PAM: authentication error for username from example.com > > > > I wish to have an IP number logged where sshd has instead logged > > 'example.com' > > > > Reading sshd's man page and sshd_config's man page, I don't find any > > way to control this. > > > > Since 'example.com' could have multiple IP numbers, how can I change > > sshd's configuration to log the IP number from whence the > > authentication error originated? > > If I recall correctly, those messages should be associated with other > messages about the host connecting, which would include the IP > address. My logs don't seem to support that. Here are consecutive lines from auth.log: Nov 24 17:13:05 ns sshd[72333]: error: PAM: authentication error for user from localhost Nov 24 17:13:06 ns last message repeated 2 times Nov 24 17:13:41 ns sshd[72340]: error: PAM: authentication error for user from 10.75.200.249 Nov 24 17:13:45 ns last message repeated 2 times Nov 24 18:41:37 ns sshd[58083]: error: PAM: authentication error for user from example.com Nov 24 18:41:39 ns last message repeated 2 times Nov 24 18:57:20 ns sshd[58148]: Accepted publickey for user from 10.75.200.249 port 52111 ssh2 Nov 24 18:58:12 ns sshd[58174]: Accepted publickey for user from 10.75.200.249 port 52612 ssh2 Nov 24 18:58:45 ns su: user to root on /dev/ttyp3 Here, "localhost" appears to come from my hosts file, as dig -x 127.0.0.1 returns a different result. example.com appears to come from reverse DNS, as there is no reference to example.com in my hosts file. 10.75.200.249 is an IP which does not have a PTR record and is not in my hosts file. Telnetting to the ssh port reveals this version string: SSH-2.0-OpenSSH_4.2p1 FreeBSD-20050903
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