Double NAT - how to set it up?

Hello everyone,

I’m setting up a RUTx50 to provide access for a small power plant. I’m stuck on one issue. On one of my VLANs, the client wants to be set up in what he calls a “double LAN.” The setup is as follows:

  • 10.x.x.100 > the RUTx VLAN
  • 10.x.x.101 > Port 2 - Client router FW/NAT
  • 10.x.x.114 > a server in 172.x.x.x NATed by x.101 waiting for a connection
  • 10.x.x.201 > Port 4 - Client datalogger who wants to connect to 10.x.x.114

The client router on port 2 requires that all communication going to .114 comes from .100. But I can’t make it work.

I made a NAT rule that says anything going to .114 is to be rewritten to .100, but I can’t even ping .114. i made test on site, i just can’t make it work.

However, when I’m on the RUT CLI, I can ping, and I can also start the connection with telnet on .114.

How can i make that all packet from .201, are like originating from .100 to .100 or .114 eye ?

As my case might be not so well explained, thus receiving not any response.

Doe a NAT rules like that one :

Does it change the source of packets coming from .201 (in direction of .114) to .100 ?

As .114, only accept communication from .100.

Thank you.