I have an RHEL 4 client when I do rpcinfo -p hostA it doesn't show any output. Is this a problem with the RHEL client or the hostA machine? I can do rpcinfo -p hostA from other clients and it works but not from my RHEL4 client. How do I check iptables to see if it's being blocked? How do I check it the firewall is on? Is there a gui to check?