Settings

ReUnion is configured entirely through reunion.cfg. The default file is heavily commented — this page summarizes each section.

warning

The file itself opens with "don't change anything if you don't know what it means" for a reason — most defaults are already tuned. Change values deliberately, one at a time.

Client ID types (cid_*)

Each cid_* option assigns an ID type to a category of client. The available type codes are:

Code	Meaning
1	Real (or hardware-generated) Steam ID (STEAM_xx:xx:xx).
2	Real (or hardware-generated) Valve ID (VALVE_xx:xx:xx).
3	STEAM_ ID generated from the client's IP.
4	VALVE_ ID generated from the client's IP.
5	Deprecated — the client is rejected.
6	Reserved for future use.
7	HLTV.
8	STEAM_ID_LAN.
9	STEAM_ID_PENDING.
10	VALVE_ID_LAN.
11	VALVE_ID_PENDING.
12	STEAM_666:88:666.

Option	Default	Applies to
cid_Steam	1	Legitimate Steam clients.
cid_SteamPending	5	Clients that authorized successfully but didn't receive a usable Steam ID.
cid_HLTV	5	HLTV relays.
cid_NoSteam47	5	Protocol 47 clients without unique ID generation support.
cid_NoSteam48	5	Protocol 48 clients without unique ID generation support.
cid_RevEmu	1	revEmu ≥ 9.74.
cid_RevEmu2013	1	RevEmu 2013.
cid_SC2009	1	SteamClient 2009 / revEmu > 9.82.
cid_OldRevEmu	1	Older revEmu versions.
cid_SteamEmu	1	hCupa's SteamEmu.
cid_AVSMP	1	AVSMP (cracked Steam).
cid_Setti	3	SETTI server scanner.
cid_SXEI	1	sXeI clients.

HLTVExcept_IP (default 127.0.0.1) lets an HLTV from a specific IP join even when cid_HLTV rejects HLTV clients.

Auth settings

Option	Default	Description
AuthVersion	4	Authorization protocol version: 1 DProto (deprecated), 2 Reunion 2015–2018, 3 Reunion 2018–2024, 4 current (recommended).
SteamIdHashSalt	(empty)	Salt for hashing generated Steam IDs, irreversibly changing them to prevent ID stealing. Recommended length 32+ characters, minimum 16. With AuthVersion >= 3 an empty value makes ReUnion fail to initialize — set 0 explicitly to disable hashing (not recommended) instead of leaving it empty.
SC2009_RevCompatMode	1	Makes SC2009-generated IDs compatible with revEmu. Cannot be disabled when AuthVersion >= 3.
EnableSXEIdGeneration	0	Enables ID generation based on sXeI client data. Only enable this if you actually run an sXeI-compatible setup.
EnableGenPrefix2	0	Adds a second ID prefix to reduce collision chance for generated IDs. Only effective with SteamIdHashSalt set; cannot be disabled with AuthVersion >= 3.

Legacy authid prefixes

The IPGen_Prefix1/2, Native_Prefix1, RevEmu*_Prefix1, SC2009_Prefix1, OldRevEmu_Prefix1, SteamEmu_Prefix1, AVSMP_Prefix1, Setti_Prefix1, and SXEI_Prefix1 options only apply when AuthVersion is 1 or 2. With the recommended AuthVersion = 4, this whole section is ignored — leave it at its defaults.

Regardless of version, banid always uses the SteamID without any prefix.

Server queries

Option	Default	Description
ServerInfoAnswerType	0	0 new-style (Steam) answers (recommended), 1 old-style GoldSrc answers, 2 hybrid — visible to both, but answers every query 3 times.
FixBuggedQuery	1	Fixes clients with a buggy server browser that would otherwise hang on connect.
EnableQueryLimiter	1	Rate-limits server queries (TSource, player list, etc.). Set 0 if you already rate-limit externally.
QueryFloodBanLevel	400	Queries/second that triggers an IP ban. Range 320–2048; legitimate traffic rarely exceeds ~80/sec.
QueryFloodBanTime	10	Ban duration in minutes for query flooding, 0–60. 0 blocks without banning.
QueryLimiterExceptIP	(section, empty)	List of IPs (one per line under [QueryLimiterExceptIP]) excluded from the query limiter.
AllowSplitPackets	0	Allow splitting outgoing packets larger than 1400 bytes, as the original Steam client does. Some monitoring tools don't support this.
IDClientsLimit	1	Max simultaneous clients from the same Steam ID, 0–32. 0 disables the limit. Useful when debugging with multiple client instances.

Logging

Option	Default	Description
LoggingMode	0	0 none, 1 console, 2 log files, 3 both.

Frequently asked

• I set SteamIdHashSalt like in DProto, but players get different SteamIDs. ReUnion uses a different, more secure hashing algorithm. Knowing a player's SteamID from before SteamIdHashSalt was enabled doesn't help reproduce it afterward.
• Can I do anything about SteamID changers? No — ID changers generate valid authorization tickets, so the server can't tell an ID was substituted. Setting SteamIdHashSalt at least prevents someone from deliberately spoofing a specific other player's ID.
• Some server monitoring tools can't fetch the player list. They're likely using an outdated query format; use a current query library such as PHP-Source-Query or equivalent.
• DProto had a Game_Name option; ReUnion doesn't. Change the reported game name from a plugin instead.