Clustered NFS Servers behind Checkpoint FW-1.

The issue:

When client tries to mount a share the mountd rpc responses are being bloked
by the FW because they are UDP responses comming not from the Virtual IP
that is being exposed to the client for the share but from the server's IP.


Is there a way to bind the NFS processes to the VCS virtual IP, so that all
responses (rpc, nfsd, mountd) come from that virutal ip?