Redhat 7 nfs 서버의 포트 고정

8.7.3. Running NFS Behind a Firewall

NFS requires rpcbind, which dynamically assigns ports for RPC services and can cause problems for configuring firewall rules. To allow clients to access NFS shares behind a firewall, edit the /etc/sysconfig/nfs file to set which ports the RPC services run on.

The /etc/sysconfig/nfs file does not exist by default on all systems. If /etc/sysconfig/nfs does not exist, create it and specify the following:

RPCMOUNTDOPTS="-p port"

This adds "-p port" to the rpc.mount command line: rpc.mount -p port.

To specify the ports to be used by the nlockmgr service, set the port number for the nlm_tcpport and nlm_udpport options in the /etc/modprobe.d/lockd.conf file.

If NFS fails to start, check /var/log/messages. Commonly, NFS fails to start if you specify a port number that is already in use. After editing /etc/sysconfig/nfs, you need to restart the nfs-config service for the new values to take effect in Red Hat Enterprise Linux 7.2 and prior by running:

# systemctl restart nfs-config

Then, restart the NFS server:

# systemctl restart nfs-server

Run rpcinfo -p to confirm the changes have taken effect.