[SNYPE00]

This is a common problem for certain routers. The fix is to assign the net_port to each machine. Heres the info from Q3, just do the translation for MOH:

How to set up Quake III for multiple users behind a NAT firewall

Typically, many Quake III users have been reporting that Quake III is unable to support multiple player connections from behind a NAT. While the first player behind the NAT joins fine, adding additional players is problematic in the default configuration. Symptoms include rejected challenges, dropped delta packets, and severe "connection interrupted" messages.

By default, Quake III clients send and receive data over the same port, causing the server to treat multiple clients as a single data connection. Quake III does have the ability to specify individual client ports for communication by adding a command line switch. Follow the procedure below to add this switch.

1. Right click on the QIII icon

2. Choose "Properties"

3. In the Target field you'll see a line like "C:\Program Files\Quake III Arena\quake3.exe"

4. Add the Quake III net_port command to specify a unique communication port for each system. The complete field should look like this: "C:\Program Files\Quake III Arena\quake3.exe" +set net_port 27660

5. Click OK.

6. Repeat for each system behind the NAT, adding one to the net_port selected (27660,27661,27662)

**Visit us at Mohadmin.com **