NFS Connections irregular

[R. G. Newbury]

> Simon Slater <pyevet at aapt.net.au> wrote:
> 
>> 	I have 3 computers A, B & C connected through an hub. B is a file
>> server running FC1, A & C have new installs of FC6. A & C can mount
>> shares on B.  However showmount -e gives:
>>
>> # mount clntudp_create: RPC: Program not registered
>>
>> from B to either of A or C; from C to A; A to C or itself.
>>
>> 	The mount -t nfs C:/share /mnt command from A returns:
>>
>> # mount: mount to NFS server 'C' failed: System Error: No route to host.
>>
>> similarly fron C to A.  Yet from server B the same command to either A
>> or C returns:
>>
>> # mount: RPC: Remote system error - no route to host.
>>
>> 	Each box can ping the others, the /etc/hosts and /etc/exports files
>> seem to be in order.  What am I missing?

The RPC: Program not registered message means that the nfs service is 
not running on A or C. This makes sense as you a may not want those 
machines to act as nfs share servers, but only as clients.

The 'No route to host' message means that the firewall on the remote end 
of the call is eating the packets. A quick check is to run 'iptables -F' 
on the remote end. If you can immediately establish the share, it 
confirms that the firewall is doing its job.

On FC6 use the program 'lokkit' which is a gui to set/open the firewall. 
Just click on the box to allow NFS and close. For sure results, then run 
'exportfs -ra' and 'service nfs restart' on the machine whose firewall 
you have just touched. Then re-mount from the other machines.

Geoff