how configure LInnksys ADSL router firewall

I have a Linksys 4 port ADSL modem.
How do I set up the firewall so that all computers on my network can
access certain TCP ports?
I can't find any way to configure 1 local IP address at a time for each
port I need. If I try to put a wildcard (*) into the IP fields it just
complains that it wants a number from 0 to 99.
There is a game I am running which uses single tcp ports 13139, 27900,
28900 and 29900 and UDP + TCP port range 60876 to 60976.
I configured single port forwarding and port range forwarding for this,
but is only allows me to put in 1 IP address for the packets to be sent
too, so only that computer on the network will work with the game, and
if I want to use the game on another network machine I have to change
all the numbers on the firewall to point to that computer's IP address.
Is there an easy way to let every computer on the network open the
necessary ports?
What does "Port Triggering" do? Does that do what I am wanting? Is
using the single port and port range forwarding the wrong way to do
this?

.

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