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Port 27015 Details
known port assignments and vulnerabilities
threat/application/port search:
| 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
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| 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
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| 6003, 7002, 27010, 27015, 27025 |
udp |
applications |
Half Life |
Portforward
|
| 1200,27000-27015 |
udp |
applications |
Half Life 2 Steam |
Portforward
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| 27015,27020 |
udp |
applications |
Half Life 2 Steam Server |
Portforward
|
| 1200,27000-27015 |
udp |
applications |
Half Life Steam |
Portforward
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| 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
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| 27010-27344 |
tcp,udp |
|
Unassigned. "Unauthorized Use Known on ports 27017 |
IANA
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18 records found
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jump to:
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Related ports: 27010 27014 27017 27020 49181
« back to SG Ports
External Resources
SANS ISC: port 27015
Notes:
Port numbers in computer networking represent communication endpoints. Ports are unsigned 16-bit integers (0-65535) that identify
a specific process, or network service. IANA is responsible for internet protocol resources, including the registration of commonly
used port numbers for well-known internet services.
Well Known Ports: 0 through 1023.
Registered Ports: 1024 through 49151.
Dynamic/Private : 49152 through 65535.
TCP ports use the Transmission Control Protocol, the most commonly used protocol
on the Internet and any TCP/IP network. TCP enables two hosts
to establish a connection and exchange streams of data. TCP guarantees delivery of data
and that packets will be delivered in the same order in which they were sent.
Guaranteed communication/delivery is the key difference between TCP and UDP.
UDP ports use the Datagram Protocol. Like TCP, UDP is used in combination with IP (the Internet Protocol)
and facilitates the transmission of datagrams from one computer to applications on another computer,
but unlike TCP, UDP is connectionless and does not guarantee reliable communication; it's up to the application that received
the message to process any errors and verify correct delivery. UDP is often used with time-sensitive
applications, such as audio/video streaming and realtime gaming, where dropping some packets is preferable to waiting for delayed data.
When troubleshooting unknown open ports, it is useful to find exactly what services/processes are listening to them.
This can be accomplished in both Windows command prompt and Linux variants using the "netstat -aon" command.
We also recommend runnig multiple anti-virus/anti-malware scans to rule out the possibility of active malicious software.
For more detailed and personalized help please use our forums.
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