portmap

When you run NFS server it will pick random ports for mountd and nlockmgr which can change upon reboot causing nightmares when the nfs is going through a firewall. You can lock these ports down so that its not random anymore edit /etc/sysconfig/nfs and put in the following STATD_PORT=4001 LOCKD_TCPPORT=4002 LOCKD_UDPPORT=4002 MOUNTD_PORT=4003 and restart the nfs services now if you look at the port assignments via rpcinfo you will see that mountd and nlockmgr is locked into a specific port # rpcinfo -p program vers proto   port 100000    2   tcp    111  portmapper 100000    2   udp    111  portmapper 100003    2   udp  … Continue Reading →