Date: Wed, 17 Jan 2001 00:49:27 +0100 (CET) From: Janko van Roosmalen <acs.van.roosmalen@hccnet.nl> To: Bill Moran <wmoran@mail.iowna.com> Cc: questions@freebsd.org Subject: Re: natd & failed to write packet back Message-ID: <Pine.BSF.4.10.10101162357460.464-100000@parmenides.utp.xnet> In-Reply-To: <3A63C754.AEA088A@mail.iowna.com>
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On Mon, 15 Jan 2001, Bill Moran wrote: > A proxy/firewall/nat box I recently set up is constantly spewing out an > error from natd: > failed to write packet back [host is down] > > What exactly is happening here? This is pretty ambiguous, I mean - what > host? It seems to indicate that a machine that was using natd went > offline before the communication completed, but it's occurring > constantly (I see the message a few times a minute at times) > > Is this indicative of any type of problem, misconfig? On a FreeBSD 3.2 box with ISDN4BSD I had a lot of similar messages but then the reason was "cannot assign requested address". In my case it was the isdn daemon that broke off the connection after a few minutes of inactivity, while there was still something going on. I gathered more info by having the natd daemon log its messages to a file in /var/log. On a 3.2 box I added these 2 lines to /etc/syslog.conf: !natd *.* /var/log/natd.log Created an empty natd.log: touch /var/log/natd.log And sent a -HUP signal to the natd daemon. From the natd.log (with date and hostname removed): 07:21:21 natd[120]: Aliasing to 0.0.0.0, mtu 1500 bytes 07:21:51 natd[120]: Aliasing to 193.173.123.59, mtu 1500 bytes 07:34:21 natd[120]: Aliasing to 0.0.0.0, mtu 1500 bytes 07:34:21 natd[120]: failed to write packet back (Can't assign requested address) 07:34:21 natd[120]: failed to write packet back (Can't assign requested address) 07:34:24 natd[120]: Aliasing to 193.173.123.54, mtu 1500 bytes 20:11:27 natd[120]: Aliasing to 193.173.123.181, mtu 1500 bytes 20:17:11 natd[120]: Aliasing to 0.0.0.0, mtu 1500 bytes 20:17:11 natd[120]: failed to write packet back (Can't assign requested address) 20:17:15 natd[120]: Aliasing to 193.173.123.15, mtu 1500 bytes 20:19:44 natd[120]: Aliasing to 0.0.0.0, mtu 1500 bytes 20:19:44 natd[120]: failed to write packet back (Can't assign requested address) 20:20:17 last message repeated 6 times 20:20:44 natd[120]: Aliasing to 193.173.123.175, mtu 1500 bytes ===Janko van Roosmalen - Vught - Netherlands=== To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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