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Port 27015 Details


known port assignments and vulnerabilities
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Port(s) Protocol Service Details Source
27015 tcp steam GoldSrc and Source engine dedicated server port

Ports 27000 to 27040 are typically used by online games.

Steam (Valve gaming platform) uses these ports:
27000-27015 udp (Steam client game client traffic)
27015-27030 tcp/udp (typically matchmaking and HLTV, also used to download Steam content)
27031 udp, 27036 tcp/udp, and 27037 tcp (incoming for in-home streaming)
3478 udp, 4379 udp, 4380 udp (outbound - Steamworks P2P networking and voice chat)
4380 udp (Steam client)

Games:
Half-Life and its mods, such as Counter-Strike
Empire: Total War (The Creative Assembly)
Left 4 Dead (Valve Corporation)
Team Fortress 2 (Valve Corporation)
SG
27015 udp applications Ports 27000 to 27040 are typically used by some online games.

Steam (Valve gaming platform) uses these ports:
27000-27015 udp (Steam client game client traffic)
27015-27030 tcp/udp (typically matchmaking and HLTV, also used to download Steam content)
27031 udp, 27036 tcp/udp, and 27037 tcp (incoming for in-home streaming)
3478 udp, 4379 udp, 4380 udp (outbound - Steamworks P2P networking and voice chat)
4380 udp (Steam client)

The SV_CheckForDuplicateNames function in Valve Software Half-Life CSTRIKE Dedicated Server 1.6 and earlier allows remote authenticated users to cause a denial of service (infinite loop and daemon hang) via a backslash character at the end of a connection string to UDP port 27015.
References: [CVE-2006-0734] [BID-16619]

The SV_CheckForDuplicateNames function in Valve Software Half-Life CSTRIKE Dedicated Server 1.1.1.0 and earlier allows remote authenticated users to cause a denial of service (infinite loop and daemon hang) via a certain connection string to UDP port 27015 that represents "absence of player informations," a related issue to CVE-2006-0734.
References: [CVE-2003-1325]

Call of Duty: Modern Warfare is vulnerable to a denial of service, caused by an error in the online multiplayer functionality. By sending a specially-crafted datagram to UDP port 27015, a remote attacker could exploit this vulnerability to cause the server to crash.
References: [XFDB-80011], [BID-56475], [SECUNIA-51280]
SG
27015 tcp,udp Half-Life and its mods, such as Counter-Strike (unofficial) Wikipedia
27015 udp halflife Half-Life Game Server SANS
1200,27000-27015 udp applications Counter Strike Portforward
27015-27020 udp applications Dark Messiah of Might and Magic Steam Client Portforward
27015 tcp applications Dark Messiah of Might and Magic Steam Client Portforward
1200,27000-27015 udp applications Day of Defeat Source Portforward
6003, 7002, 27010, 27015, 27025 udp applications Half Life Portforward
1200,27000-27015 udp applications Half Life 2 Steam Portforward
27015,27020 udp applications Half Life 2 Steam Server Portforward
1200,27000-27015 udp applications Half Life Steam Portforward
27015,27020 udp applications Half Life Steam Server Portforward
27015 tcp,udp applications Rag Doll Kung Fu Server Portforward
27015 tcp applications Steam Server Portforward
27015 udp halflife Half-life game server Nmap
27000-27050 tcp,udp games Ports 27000 to 27050 are typically used by some online games.

Steam (Valve gaming platform) uses these ports:
27000-27015 udp (Steam client game client traffic)
27015-27030 tcp/udp (typically matchmaking and HLTV, also used to download Steam content)
27031 udp, 27036 tcp/udp, and 27037 tcp (incoming for in-home streaming)
3478 udp, 4379 udp, 4380 udp (outbound - Steamworks P2P networking and voice chat)
4380 udp (Steam client)
SG
27015-27020 udp applications Dark Messiah of Might and Magic Steam Client Portforward
27010-27344 tcp,udp Unassigned. "Unauthorized Use Known on ports 27017 IANA
19 records found

Related ports: 27010  27014  27017  27020  49181  

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