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Port 27020 Details
known port assignments and vulnerabilities
threat/application/port search:
| Port(s) |
Protocol |
Service |
Details |
Source |
| 27020 |
tcp,udp |
steam |
Valve Steam Client
Team Fortress 2, Day of Defeat, Counter Strike uses ports 27020-27039 (TCP/UDP). |
SG
|
| 27020-27039 |
tcp |
applications |
Counter Strike |
Portforward
|
| 27015-27020 |
udp |
applications |
Dark Messiah of Might and Magic Steam Client |
Portforward
|
| 27020-27039 |
tcp |
applications |
Day of Defeat Source |
Portforward
|
| 27020-27039 |
tcp |
applications |
Half Life 2 Steam |
Portforward
|
| 27015,27020 |
udp |
applications |
Half Life 2 Steam Server |
Portforward
|
| 27020-27039 |
tcp |
applications |
Half Life Steam |
Portforward
|
| 27015,27020 |
udp |
applications |
Half Life Steam Server |
Portforward
|
| 27020-27050 |
tcp,udp |
applications |
Steam Client |
Portforward
|
| 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
|
| 27010-27344 |
tcp,udp |
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Unassigned. "Unauthorized Use Known on ports 27017 |
IANA
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11 records found
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jump to:
 |
Related ports: 27015 27017 27039
« back to SG Ports
External Resources
SANS Internet Storm Center: port 27020
Notes:
Well Known Ports: 0 through 1023.
Registered Ports: 1024 through 49151.
Dynamic/Private : 49152 through 65535.
TCP ports use the Transmission Control Protocol. TCP is the most commonly used protocol
on the Internet and any TCP/IP network. Whereas the IP protocol deals only with packets, 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, a communications protocol for the Internet network,
transport, and session layers. Like TCP (Transmission Control Protocol),
UDP is used with IP (the Internet Protocol) and makes possible 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, 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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