Netgear → Allow multi-machines to have same ports opened?

I have a netgear rp614 and was wondering how do I setup all the computers on my network to have the same ports open on each machine ? I've got the port forwarding on right now but that is only allowing 1 machine at a time to access those ports otherwise I get port overlap when trying to open them for additional machines.

Looking at it from the router side in TCP/IP, it makes sense.

MAJOR OVERSIMPLIFICATION AHEAD.

Let's say he gets a packet on port 80. He checks his list and sees who gets the packet for port 80, but he can only send it to one of them.

That's just the way TCP/IP works.

It is more related to NAT rather than tcp/ip.

OK, then how do I direct it so that all machines can connect to the program (not necessarily at the same time) without having to update the settings every time ?

What is the application?

If (1) the rp614 supports trigger ports and if (2) only one machine uses the application at any give time, you might be able to get this working.

Agree with SYNACK.

Further, if you are lucky your application allows you to change ports used so that the application running on each LAN computer can be configured to use different ports. That avoids the whole "port forwarding to multiple computers" issue with NAT.

The above posters are correct. Normally one cannot forward the same port to different IPs behind a router UNLESS one has a number of static IPs.

So the application has to be smart and designed to take routers into account and thus provide a facility to change actual operational ports (to conduct function) which can be separate from the 'communication' port used to establish contact and then pass onto operational ports.

Trigger ports are useful going outbound on an initial communication port (which will open for a short session only and thus then available for other PCs) so as to establish operations ports,,,,

I don't think it is possible to do, i've been trying to figure that out for a long time.

Example: Having 3 machines, all with their own individual paid copy of a game and all 3 trying to access the gaming site at the same time. No go

said by smilepak:

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Example: Having 3 machines, all with their own individual paid copy of a game and all 3 trying to access the gaming site at the same time. No go

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This depends on the game. Many games allow multiple LAN PCs to access the same server at the same time without the need of any router configuration. It depends how the game is implemented. (... and some games don't work from behind a router at all, no matter what you try )

With todays abundance of NAT and routers, game developers should take make it highest priority to make the game as NAT friendly as possible, else they (1) loose prospective customers and (2) get flooded with networking related support calls.

Besides, ajdvr later clarified that the access does not need to be concurrent.