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Author Topic: Port Forwarding for More than one IP Address  (Read 6243 times)

typhoid_larry

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Port Forwarding for More than one IP Address
« on: July 05, 2009, 07:57:55 PM »

Is there any way on the DGL4500 to forward a port to more than one IP on my LAN?  Under Advanced >> Gaming Rule I get a conflict message when I try to add the same port to another address.
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Reinvented

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Re: Port Forwarding for More than one IP Address
« Reply #1 on: July 05, 2009, 11:22:57 PM »

No, you may not.  Might I inquire as to what you are forwarding?  There's a reason that UPnP is there as well, and you can even use the DMZ feature. 
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Fatman

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Re: Port Forwarding for More than one IP Address
« Reply #2 on: July 06, 2009, 10:52:08 AM »

To explain more clearly, you can not forward a packet to 2 different hosts for the same NAT connection.  This isn't a limit of our device, but of NAT.

Now some people set up port triggers so that outbound traffic from a1 host (among potentially many) allows that host to use the shared port, but this is becoming outdated, and was never a great solution in the first place.

The more modern solution is to use UPnP for your port forwards and allow your devices to open their own ports dynamically.
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typhoid_larry

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Re: Port Forwarding for More than one IP Address
« Reply #3 on: July 06, 2009, 11:34:56 AM »

Well,  what I'm trying to do is get to is get here:

http://<local_host>:8080/

This is the port address required for the BitTorrent client on my Buffalo NAS.  To get the Buffalo help desk assistance I had to enable the port to a workstation to prove I had the port forwarded, but without it going to the local host it still couldn't be trouble-shot. 

I set up the port in the special applications section but that did not provide any results.
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Fatman

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Re: Port Forwarding for More than one IP Address
« Reply #4 on: July 06, 2009, 12:52:21 PM »

All you should need to do is set up a port forward for that service to that LAN IP.  And then from outside your network visit the below.

http://<WAN-IP>:8080

Why did you want to forward it to multiple machines again?
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