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Old 05-26-2016, 10:21 PM   #1
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Huh? You can't tell NFS which interfaces to listen to?

I've got an NFS server on a virtual data-center, and I'd simply like to be sure that the server is "listening" on just one of the machine's two (virtual) NICs, but not the other.

... Huh? Can't you do that?

I suppose that I have become accustomed to the idea that this sort of thing was a routine feature of any Linux service.

Last edited by sundialsvcs; 05-26-2016 at 10:23 PM.
Old 05-27-2016, 07:39 AM   #2
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You can give specific hosts or network ranges you want to be able to mount your shares in your exports file. That would effectively insure only one interface does the mounts unless you've done some tricky routing or unless you have multiple interfaces using the same VLAN. We do this with our deduplication (NAS) appliances so nothing mounts via the IP we use for management of the appliances but rather uses only a dedicated VLAN for mounting and doing backups.

Alternatively you can use firewalld/iptables to restrict NFS/rpc traffic to specific interfaces.

If you're doing NFS4 I believe you can adjust restrictions in the configuration file for NFS4 vs the exports file.
Old 05-30-2016, 05:08 AM   #3
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check out this link below it will give you an idea:

from link above:
This question should be on Server Fault. Nevertheless, the following should do the trick, assuming you're talking about TCP and the IP you want to allow is

iptables -A INPUT -p tcp --dport 8000 -s -j ACCEPT
iptables -A INPUT -p tcp --dport 8000 -j DROP
then you can check using netstat to verify:

netstat -ntlup | grep -i "listen"

Last edited by JJJCR; 05-30-2016 at 05:09 AM. Reason: edit


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