This page is just an information dump so I can possibly save someone some time! For now it covers games that I and my gaming friends make use of. Links to patches we use or other useful information is given where available.

One of the most easily ‘forgotten’ configuration elements of a PC game when used online it the firewall/port forwarding rules. Default port numbers are presented here for easy reference - details are correct at time of writing! Ranges (x-y) are inclusive (1-3 means 3 ports - 1, 2 and 3 - need to be forwarded). UDP/TCP means both UDP and TCP ports of the range specified need to be forwarded.

Colin McRae Rally 2

Patch - CMR2Patch109.exe
Cheat code - allthecars, allthetrack

DirectPlay 7 ports (refer to details at end of page)

F1 Challenge ‘99-’02

34297 UDP
34397 UDP/TCP
34496 UDP/TCP

Flatout

3rd party patch - FOV2_0_1bfs.rar
Flatoutnet - FlatOutNet.zip

Grand Prix Legends

6970-6971 UDP

Half-Life

Patch - Steam download
SVEN Coop - svencoop30full.exe
SVEN Coop update - svencoop30_hlsp_update.exe

27015 UDP

Kingpin

Patch - kingpin_v121_patch.exe
Coop mod - Coop_Mod_10_Windows.zip

31501 UDP

Midnight Club II

No patches released
Cheat code - rimbuk (lowercase, toggles cheat on/off)

27900-27901 UDP
28910-28910 UDP

MotoGP 2

Bike/AI patch - MotoGP2_Patch.zip
2006 season data - MotoGP2 2006 Mod.rar

Nascar 2003 Racing

Patch - nr2003_update_en_1000_1201.exe
Final patch - nr2003_1201_fix.zip
GTP Mod - Redline_GTP_V1.1.0.exe

32766-34795 UDP (upper number donotes the maximum number of racers)

Quake 1

OpenGL Patch - glpro350.zip

Quake 3

Patch - q3pointrelease_132.exe
Final patch - quake3-1.32c.zip

Re-Volt

Unofficial multi-version patch switcher - Rvpssetup.exe

Serious Sam Second Encounter

25600-25601 UDP (V1.05 onwards)
25600-25601 TCP (V1.05 onwards)

Patch - SecondEncounterPatch107_Euro.exe

Toca Race Driver 2

Patch - rd2v12upgrade.zip
No movies intro - RaceDriver2NoIntroFixAll.zip

10975 UDP

Unreal Tournament

Patch - utpatch436.exe
Bonus Pack 1 - UTBonusPack1.zip
Bonus Pack 2 - UTBonusPack2.zip
Bonus Pack 4 - UTBonusPack4.zip
OpenGL driver - utglr32.zip
Enhanced Feedback Mod - EnhancedFeedback.zip

7777-7781 UDP
27900 UDP (Uplink port for game to appear on the master server)
8080 UDP (Only needed for web server across the Internet - WWW Admin)

DirectX Games

Unfortunately, quite a few ports to forward on these. Some routers may not allow this due to firmware/feature limitations.

2300-2400 UDP/TCP
47624 UDP/TCP (DirectPlay 7 titles only)
6073 UDP/TCP (DirectPlay 8 titles only)

A single DirectPlay game player does not require all of the ports in the range. Each player will actually only use one but the port itself is chosen at ‘random’. However, you can limit the range from which DirectPlay assigns the ports by using DXPort from PuffinSoft (don’t worry it’s free). Check the documentation for DXPort for further details.

I’ve personally tested (successfully) Codemasters Colin McRae Rally 2 and Toca2 between 2 NAT based routers (D-Link DSL-504 and Linksys BEFRS41) using DXPort.