Date: Wed, 5 Oct 2005 00:50:26 +0930 From: Malcolm Kay <malcolm.kay@internode.on.net> To: stable@freebsd.org Subject: Hosts/dns contention in FBSD 5.4 Message-ID: <200510050050.26723.malcolm.kay@internode.on.net>
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I have sytems both at home and at work running FreeBSD 5.4 release with a more or less standard installation. Both systems are connected to internet routers via a nics; and under normal circumstances all works fine -- or at least seems to be working fine. In both cases there are other computers connected via LAN. But if the internet connection breaks -- e.g. the routers crash or the ISP connection fails for some reason then trying to ssh into the machine from another local machine is a problem -- either timing out our taking a very very long time. With the internet connection down I notice a similar problem when booting in the sendmail script. Now it is my understanding that resolution of host names should determine from /etc/host.conf and/or /etc/nsswitch.conf whether to first try /etc/host or the dns server addressed by /etc/resolv.conf I believe these should give preference to /etc/hosts but never-the-less things get stuck when the dns server can't be reached. ************/etc/host.conf**************** # Auto-generated from nsswitch.conf, do not edit hosts bind ************/etc/nsswitch.conf************ group: compat group_compat: nis hosts: files dns networks: files passwd: compat passwd_compat: nis shells: files Am I missing something? (Probably) Is this behaviour normal? Can the lockups be avoided? Any help, ideas or clarification would be appreciated. Malcolm Kay
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