System information

Controls which TCP and UD P port mo untd (rpc. mo untd ) uses.

ST AT D _P O R T = port

Controls which TCP and UD P port status (rpc. statd ) uses.

LO C KD _T C P P O RT = port

Controls which TCP port nl o ckmg r (l o ckd ) uses.

LO C KD _UD P P O R T = port

Controls which UD P port nl o ckmg r (l o ckd ) uses.

If NFS fails to start, check /var/l o g /messag es. Normally, NFS will fail to start if you specify a port

number that is already in use. After editing /etc/sysco nfi g/nfs, restart the NFS service using

servi ce nfs restart. Run the rpci nfo -p command to confirm the changes.

To configure a firewall to allow NFS, perform the following steps:

Pro ced u re 9 .1. Co n f ig u re a f irewall t o allo w NFS

1. Allow TCP and UD P port 2049 for NFS.

2. Allow TCP and UDP port 111 (rpcbi nd /sunrpc).

3. Allow the TCP and UDP port specified with MO UNT D _P O RT = "port"

4. Allow the TCP and UDP port specified with ST AT D _P O R T = "port"

5. Allow the TCP port specified with LO C KD _T C P P O RT = "port"

6. Allow the UDP port specified with LO C KD _UD P P O R T = "port"

Note

To allow NFSv4.0 callbacks to pass through firewalls set

/pro c/sys/fs/nfs/nfs_cal l back_tcppo rt and allow the server to connect to that port

on the client.

This process is not needed for NFSv4.1 or higher, and the other ports for mo untd , statd , and

l o ckd are not required in a pure NFSv4 environment.

9.7 .3.1 . Disco vering NFS expo rt s

There are two ways to discover which file systems an NFS server exports.

First, on any server that supports NFSv2 or NFSv3, use the sho wmo unt command:

$ showmount -e myserver

Export list for mysever

/exports/foo

/exports/bar

Second, on any server that supports NFSv4, mount / and look around.

⁠Chapt er 9 . Net work File Syst em (NFS)