Unable to NFS mount filesystem

Issue

• There are 2 KVM systems on the same network - 1 is able to NFS mount a file system, the other is not.
• The 2 vm's should be identical, except for IP, since they were cloned from the same system.
• The error seen is:

mount: mount to NFS server 'nfs.server' failed: System Error: Connection timed out.