[plug] Pal Talk

[Linux]

Hi all there is a voice talk program called "PalTalk" that we are useing on
our win98 comps
I have a Linux Server which maintains our internet connection with only 2
win98 comps connected
Both windows comps can use the program and talk to others on the internet
however we cannot hear each other locally I use ipchains in my firewall
rulesets.
I use Redhat 6.1
My rc.firewall contains a line
echo "1" > /proc/sys/net/ipv4/ip_forward

Ports used for PalTalk:
TCP 2090
TCP 2091
TCP 2095
TCP 5001-5005
TCP 5200-5203
TCP 8080             (user configurable)
UDP 2090
UDP 2091
UDP 8090-8290
UDP 1024-2500   (user configurable)

How do I set up these ports to allow local users to talk to each other