iptables rules

Hello ,

I am new to iptables.I have a task.I have a APP vm running on top of a host machine.I also have a guest vm running on top of this host machine.

IP of host : 192.168.122.4

IP of APP VM : 192.168.100.4

IP of Guest VM: 192.168.122.9

The App VM is running a nfs server process to which I want my guest vm to be able to mount to. Basically I want a rule on the host saying whatever nfs requests comes in,forward it to 192.168.100.4 (APP VM).Note that the host is not running any nfs related processes.(no ports in listening mode)

How can I achieve this? And if I need to mount from the guest vm,can i specify the IP of APP VM directly?

Any comments/suggestions will be of great help.

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