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From: "Pádraig Brady" <P@draigBrady.com>
To: linux-nfs@vger.kernel.org
Subject: redundant reverse DNS on NFS mount or umount
Date: Tue, 17 Feb 2009 15:22:35 +0000	[thread overview]
Message-ID: <499AD63B.20806@draigBrady.com> (raw)

I've a problem where reverse DNS is being done by the NFS server.
This is very problematic when the DNS server goes away.
As far as I can see there should be no lookups being performed
because I've nothing in /etc/hosts.{allow,deny} and just
numeric hosts in /etc/exports.

I can simulate this easily by putting a bad nameserver in /etc/resolv.c=
onf
and restarting the nfs server. Any mounts will take then take ages.
Others seem to have had this issue as well, but possibly with
non numeric names in /etc/exports:
http://marc.info/?l=3Dlinux-nfs&m=3D110977757630297&w=3D2
http://marc.info/?l=3Dlinux-nfs&m=3D111015343008456&w=3D2

Here are my config details:

# rpm -q nfs-utils
nfs-utils-1.1.0-6.fc8

# cat /etc/resolv.conf
search company.com
nameserver 192.168.2.110

# cat /etc/exports
/home   192.168.2.25(async,rw,all_squash,anonuid=3D500,anongid=3D500)

Any ideas appreciated.

cheers,
P=C3=A1draig.

             reply	other threads:[~2009-02-17 15:32 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-02-17 15:22 Pádraig Brady [this message]
     [not found] ` <499AD63B.20806-V8g9lnOeT5ydJdNcDFJN0w@public.gmane.org>
2009-02-26 16:00   ` redundant reverse DNS on NFS mount or umount Chuck Lever
2009-03-02 17:41   ` J. Bruce Fields
2009-03-02 17:44     ` Chuck Lever

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