Anti-cheat guide

AC (anti cheat) guide

Server setup

3 settings in mtaserver.conf control AC behaviour for a server:

<disableac></disableac>

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Comma separated list of disabled anti-cheats. This setting disables specific AC codes. AC codes are shown to the player when that detection has been triggered. Available codes are:

Code for <disableac>	Displayed on detect	Required server version	Required <minclientversion>	Notes
1	AC #1	any		Classic health/armour hack detector
4	AC #4	any		Detects presence of trainer. Capital letters in the message are for tagging particular trainers
5	AC #5	any		Detects use of trainer.
6	VF #6	any		Detects use of trainer incl.: player movement, health/damage, weapons, money, gamespeed, game cheats, aimbot
7	VF #7	any		Detects use of trainer.
8	VF #8	any		Detects unauthorized mods
11	AC #11	any		More trainers
	VF #11	any		Dll injector / Trainer
13	SD #13	any		Data files issue
17	VF #17	any		Speed / wall hacks
21	AC #21	any	1.3.1-9.05097	More trainers
	VF #21	any	1.3.1-9.05097	Custom gta_sa.exe
26	SD #26	any	1.3.4-9.05858	Anti-cheat component blocked
31	SD #31	any		gta3.img player skin mods (1.4 only. For 1.5, use allow_gta3_img_mods)

<enablesd></enablesd>

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Comma separated list of enabled special detections. A special detection is a type of anti-cheat for (usually) harmless game modifications. Competitive servers may wish to enable special detections, but most servers should leave this setting blank. Available codes are:

Code for <enablesd>	Displayed on detect	Required server version	Required <minclientversion>	Notes
12	SD #12	any		Disallow custom D3D9.DLL
14	SD #14	1.3.1-9.04605	1.3.1-9.04605	Disallow virtual machines such as VMWare
15	SD #15	1.3.1-9.04791	1.3.1-9.04791	Disallow disabled driver signing
16	SD #16	1.3.1-9.05097	1.3.1-9.05097	Disallow disabled anti-cheat components. This is triggered when an anti-cheat component can not start. It is usually due to some problem with the PC and might be fixed by a reboot. Can also be triggered by a virus.
20	SD #20	1.3.1-9.05097	1.3.1-9.05097	Disallow non-standard gta3.img (For servers not using onPlayerModInfo)
22	SD #22	1.3.4-9.05884	1.3.4-9.05884	Disallow resource download errors/corruption
28	SD #28	1.3.4-9.05884	1.3.4-9.05884	Disallow Linux Wine

<client_file name="data/carmods.dat" verify="0"/>

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By default, clients may not join a server if they have customized GTA:SA data files. Adding one or more of the above lines excludes files from validation. The file names that can be used are:

• "data/carmods.dat"
• "data/animgrp.dat"
• "data/ar_stats.dat"
• "data/melee.dat"
• "data/clothes.dat"
• "data/object.dat"
• "data/default.dat"
• "data/surface.dat"
• "data/default.ide"
• "data/gta.dat"
• "data/surfinfo.dat"
• "data/peds.ide"
• "data/vehicles.ide"
• "data/pedstats.dat"
• "data/water.dat"
• "data/txdcut.ide"
• "data/water1.dat"
• "models/coll/weapons.col"
• "data/weapon.dat"
• "data/plants.dat"
• "anim/ped.ifp"
• "data/furnitur.dat"
• "data/procobj.dat"
• "data/maps"

Note 1: "data/maps" represents all the files and directories within "data/maps"

Note 2: "data/handling.cfg" is not included as it is always ignored by MTA because of the internal vehicle handling functions. See here if you want to load custom handling.cfg files

Client

When joining a server, the server AC info is displayed in the client console (F8)
Example:

   Server AC Info: [Allowed client files: None] [Disabled AC: None] [Enabled SD: None]

Disabled AC contains the contents of the server setting from <disableac></disableac>
Enabled SD contains the contents of the server setting from <enablesd></enablesd>
Allowed client files contains numbers to indicate which client files the server allows to be modified. The numbers represent these files:

• 1 - "data/carmods.dat"
• 2 - "data/animgrp.dat"
• 4 - "data/ar_stats.dat"
• 5 - "data/melee.dat"
• 6 - "data/clothes.dat"
• 7 - "data/object.dat"
• 8 - "data/default.dat"
• 9 - "data/surface.dat"
• 10 - "data/default.ide"
• 12 - "data/gta.dat"
• 13 - "data/surfinfo.dat"
• 14 - "data/peds.ide"
• 15 - "data/vehicles.ide"
• 16 - "data/pedstats.dat"
• 17 - "data/water.dat"
• 18 - "data/txdcut.ide"
• 19 - "data/water1.dat"
• 20 - "models/coll/weapons.col"
• 21 - "data/weapon.dat"
• 22 - "data/plants.dat"
• 23 - "anim/ped.ifp"
• 24 - "data/furnitur.dat"
• 25 - "data/procobj.dat"
• 26 - "data/maps"

Using modified files

If you want to use modified data files from your GTA:SA install directory, check this check box:

   Settings->Multiplayer->Use customized GTA:SA files

(check box only appears if your GTA:SA data files are customized)

Note that this will restrict your access to public servers as most do not allow customized data files.

AC Panel resource

An anti-cheat helper resource called acpanel is included with the default resources.

It shows the current anti-cheat status of your server, along with an option to keep your clients up to date and a basic implementation of onPlayerModInfo to block modified img files.