Port 27000QuakeWorld Master Server
Ports 27000 through 27006 are commonly used by id Software's QuakeWorld master servers to coordinate game servers and clients. These master servers facilitate player matchmaking, server browsing, and game coordination for Quake-based multiplayer gaming ecosystems..
- transport
- udp
- in transit
- cleartext
- assignment
- unofficial
- risk
- 4/10
- lookups
- 11,210
single transport
payload readable on path
used by convention
caution
rank 371 of 993 · top 37%
1 other service is registered on port 27000. compare all 2 →
Technical Details
what runs on :27000This port range (27000-27006) is primarily used for QuakeWorld, an extension to the original Quake multiplayer functionality developed by id Software. QuakeWorld introduced enhanced networking capabilities optimized for latency and connectivity, requiring dedicated master servers to maintain lists of currently available game servers.
QuakeWorld clients typically communicate over UDP with these master servers to request updated server lists and other matchmaking information. Game servers also periodically report their status to the master servers, aiding in accurate matchmaking. This architecture helps reduce connection setup times and streamlines gameplay initialization among players.
While QuakeWorld specifically popularized these port assignments, similar port ranges are often reused in other multiplayer gaming contexts, particularly where lightweight, latency-sensitive communication is necessary. Due to the low overhead and broad compatibility of UDP, it remains the dominant transport protocol in such gaming applications.
Security Information
exposure of :27000risk score
4/ 10caution
worth attention. how exposed you are depends on configuration — don't leave it reachable from the internet without a reason.
gaming averages 4.0 across 124 ports — this one sits level with it.
in transit
cleartext
credentials and payloads are readable by anyone on path
assignment
unofficial
used by convention, not registered — what answers here varies by deployment
reachable over
udp
udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite
security overview
Common vulnerabilities on these ports stem from their reliance on UDP, which is connectionless and susceptible to spoofing, amplification attacks, and denial-of-service scenarios. Attackers may exploit improperly filtered ports to launch reflection/amplification-based DDoS attacks or to disrupt legitimate game traffic, impacting player experience.
In addition, master server implementations might be prone to flaws such as input validation issues, enumeration vulnerabilities that leak server or player data, and abuse of matchmaking protocols to flood or disconnect legitimate users.
Mitigations include network-layer filtering to restrict UDP traffic to known, authorized IP ranges, implementing rate limiting to counter abuse, and monitoring for anomalous traffic patterns. Secure coding practices on the application layer, such as robust input validation and authentication of server communications, also enhance resilience against exploitation.
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risk mix of the 8 listed
- caution100%
0 of 8 encrypted