Had a nice working nfs setup which I setup a few years ago. Now after installation of new firewall I changed some static ip addresses of the two HDR machines and then set about altering the folder configuration ip address statements. In fact surely the 'server' machine is the one whose content you're trying to access from the other i.e the 'client' so is the ip address in the folder of the server that of the client ?. Also are any machine named descriptions relevant or not as setup in the Web IF ? and also the nfs automount service should not be running on the client machine I presume.