On Thu, Feb 18, 2010 at 3:00 AM, Rudi Ahlers <Rudi@xxxxxxxxxxx> wrote:
> Hi all,
> Which ports do I need to have open on an NFS client's firewall to allow it
> to connect to a remote NFS servers?
> When I disable iptables (using ConfigServerFirewall), it connects fine, but
> as soon as I enable it, NFS gives me this error:
> root@saturn:[~]$ mount master1.mydomain.co.za:/saturn /bck
> mount: mount to NFS server 'master1.mydomain.co.za' failed: RPC Error:
> Unable to send.
> I have added ports 111 & 2049 in both the TCP & UDP ingres & exgress ranges,
> but that doesn't seem to help. portmap & nfs is running as well. But as I
> say, as soon as I disable the firewall, it mounts fine.
> Google search results reveal a lot of different ports, like 4000:4004,
> 83xxxx (something, I forgot) but it still doesn't help.
>
> root@saturn:[~]$ rpcinfo -p
> program vers proto port
> 100000 2 tcp 111 portmapper
> 100000 2 udp 111 portmapper
> 100021 1 udp 48996 nlockmgr
> 100021 3 udp 48996 nlockmgr
> 100021 4 udp 48996 nlockmgr
> 100021 1 tcp 47195 nlockmgr
> 100021 3 tcp 47195 nlockmgr
> 100021 4 tcp 47195 nlockmgr
> 100011 1 udp 4004 rquotad
> 100011 2 udp 4004 rquotad
> 100011 1 tcp 4004 rquotad
> 100011 2 tcp 4004 rquotad
> 100003 2 udp 2049 nfs
> 100003 3 udp 2049 nfs
> 100003 4 udp 2049 nfs
> 100003 2 tcp 2049 nfs
> 100003 3 tcp 2049 nfs
> 100003 4 tcp 2049 nfs
> 100005 1 udp 4003 mountd
> 100005 1 tcp 4003 mountd
> 100005 2 udp 4003 mountd
> 100005 2 tcp 4003 mountd
> 100005 3 udp 4003 mountd
> 100005 3 tcp 4003 mountd
>
> --
I would strongly recommend using NFS4 if at all possible.
See Chapter 18 for NFS in general and 18.8 for security issues
http://www.centos.org/docs/5/html/Deployment_Guide-en-US/s1-nfs-security.html
--
Enjoy global warming while it lasts.
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