[CentOS] NFS and iptables issues

Thu Sep 13 20:30:47 UTC 2007
Matt Hyclak <hyclak at math.ohiou.edu>

On Thu, Sep 13, 2007 at 03:22:39PM -0500, Chuck Campbell enlightened us:
> I've got a newly installed Centos 5.0 box, planned to replace an ageing server
> (solaris box).  I've set up the nfs shares, but the other solaris boxes
> won't mount them, unless I turn of iptables on the Centos box.  If I do that,
> they mount, and all operations tested to date work fine. 
> Iptables is allowing the 2049 tcp and udp ports already.  What else needs to
> be opened up in iptables for nfs to work through the firewall?
> I looked at the RHEL system admin guide on NFS and found nothing useful.

I set the following in /etc/sysconfig/nfs (probably doesn't exist):


Then in iptables, I allow 4000-4002 on both TCP and UDP. I'm not positive
which protocol STATD and MOUNTD use - possibly both, but it seems to work
for me (along with allowing 2049 through).


Matt Hyclak
Department of Mathematics 
Department of Social Work
Ohio University
(740) 593-1263