How can I foward a port that is on a different subnet in my home network.?

Question

Hello Im running a webserver on my network with the ip of 192.168.1.x. My workstations reside on 192.168.16.x. How can I port foward from a machine on 192.168.16.x? When I attempted to do this on my router it said I could only enter a lan address. My current net layout is router -> server with two nics one of them with the address of 192.168.1.x and the other with the address of 192.168.16.x -> workstations 192.168.16.

Thank you the router im using is a netgear its a home model and not an enterprise one.

Im port fowarding from a workstation because an application im using requires it.

Thanks for the advice. I was able to achieve succes by configure routing on my webserver. I added the port on the webserver and then port fowarded to my netgear. Thanks lowlevel. You will get best answer as soons as i can do it.

Answer 1

I'm confused, why would you want to forward a port from a workstation? I could understand forwarding a port to your webserver...

Answer 2

That will be because you'll have a subnet mask of 255.255.255.0...

And it's seeing 192.168.1.x and 192.168.16.x as two different networks...

You could frig it by setting up routing through the webserver, or getting a router that supports DMZ and put your webserver in there.
Or, if you're not particularly worried about security between machines on your local network, change the mask to 255.255.0.0 and that will aggregate the networks

Answer 3

The simple answer is you cannot do this.

A low end gateway router accomodates only 1 LAN subnet.

However, if you want you can set the router up to port forward to a static IP on the subnet. Let's say you have a LAN subnet of 192.168.3.0/24. The router LAN ip is 192.168.3.1; the server is 192.168.3.2; workstation a is 192.168.3.3 and the server and workstation a have static LAN ip addresses; the router assigns LAN IP to other devices in the 192.168.3.50-100 range. You want http inbounds to your public IP to be portforwarded to server so it is set to port forward http to 192.168.3.2 and it goes there; you want ftp inbounds to your public IP to go to workstation a so it is set to portforward ftp to 192.168.3.3. Careful set up may do what you wish.

More sophisticated routers have a DMZ port - which further isolates things but your low end unit cannot do this.

Answer 4

To foward ports you need a static ip on the end computer, so to set this up open windows configuration wireless manager, and under IP settings make sure you have a static ip such as "192.168.16.3" and then go to the router admin page and to the port fowarding section, enter this exact address there and restart the end computer's network connection.

Answer 5

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