I'm trying to mount a filesystem from an nfs server RH (nfs-utils-0.3.3-5) on a client running Ubuntu 12.04 server.

Using command:

sudo mount -Vt nfs server.xxx.yyy.zz:/mnt/home/homes /mnt/home/homes

I get the error:

mount.nfs: Connection timed out

When I use the -V argument it responds quickly with:

mount from util-linux 2.20.1 (with libblkid and selinux support)

The /etc/fstab has the line for the filesystem in question:

server.xxx.yyy.zz:/mnt/home/homes /mnt/home/homes nfs

What should I look for? Any help appreciated.

The PC you are trying to mount NFS and the target should be in one tree of IP. Ex 192.168.1.xx and 92.168.1.xx
Both the IPs shd be Static.
Check the link of network while doing NFS , is it going down ???

Please make sure that following service are running on server side: rpcbind, nfslock and nfs. And on client side: rpcbind, rpcidmapd, nfslock and netfs. Then try to mount.

What do your /etc/hosts.allow, /etc/hosts.deny, and /etc/exports files on the server look like?
Anything in /var/log/messages on the server about the attempted connection?

Thanks....

The network is fine.

on server side: rpcbind, nfslock and nfs = all ok
on client side: rpcbind = rpcbind -w, rpcidmapd = ok , nfslock and netfs not running but nfsiod is running.



/etc/hosts.allow and /etc/hosts.deny are empty. /etc/exports is correctly configured on the nfs server which is working with other clients. /var/log/messages has no reference to the mount request.

How do I start nfslock and netfs on the client?

/etc/init.d/nfslock start
/etc/init.d/netfs start

I'm afraid that neither of those files exist but I have installed nfs-common. Are they required?

Try to install nfs as "yum install nfs*", * means should install all dependencies or desire files. I hope it will install nfslock and netfs it self becuase I installed nfs in this way so I had these files. One more thing disable your firewall as vim /etc/selinux/config and set SELINUX=disabled. This may also resist you to mount nfs share on both side server and client.
Please refer the following link:

http://www.server-world.info/en/note?os=Fedora_14&p=nfs

Thanks. I'm afraid I still don't have a resolution. I can mount from this server to other machines on the network but not from other machines to this one. I get a 'connection timed out' message. The problem seems to be a Ubuntu specific issue so the Fedora notes aren't throwing any light on it.

It worked when I did this:

sudo mount -o proto=udp server:/mnt/homedirs /mnt/homedirs

Great!