Port 9987TeamSpeak 3 Voice
Port 9987 is primarily used as the default UDP port for TeamSpeak 3 servers, facilitating low-latency real-time voice communication for gaming and online communities. Voice packets transmitted over this port allow users to communicate clearly and efficiently during collaborative activities such as multiplayer gaming sessions, streaming coordination, and virtual conferencing..
- transport
- udp
- in transit
- cleartext
- assignment
- unofficial
- risk
- 4/10
- lookups
- 11,909
single transport
payload readable on path
used by convention
caution
rank 334 of 993 · top 34%
Technical Details
what runs on :9987TeamSpeak 3 leverages port 9987/UDP as its primary channel for voice data transmission between the server and client applications. The use of the UDP protocol ensures minimal latency, which is critical for synchronous voice communication. Unlike TCP, UDP reduces the overhead involved in connection establishment and retransmission, allowing smoother, real-time voice streams.
Operating on this port, TeamSpeak 3 organizes client-server connections, managing codecs, user channels, permission structures, and audio packet streams. The server handles codec negotiation based on user settings to optimize bandwidth usage without sacrificing audio clarity. Due to the lightweight nature of voice packets and minimal acknowledgment requirement, UDP suits TeamSpeak's design priorities perfectly.
It's important to note that although port 9987 is unofficial and subject to overlap with other services (per IANA listings), it remains the de facto default for TeamSpeak 3 servers. Administrators may customize the port assignment if conflicts arise or based on network security policies.
Security Information
exposure of :9987risk 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:
- Open UDP ports are susceptible to DoS/DDoS amplification attacks, where attackers send spoofed UDP requests to flood targets.
- Potential for unauthorized access if TeamSpeak servers are misconfigured or left unprotected, leading to eavesdropping or service abuse.
- Exploitation of outdated TeamSpeak server software, introducing risks such as remote code execution or privilege escalation.
Common Mitigations:
- Implement firewall rules to restrict UDP/9987 exposure to known IP ranges or whitelist trusted clients.
- Keep TeamSpeak server software updated with security patches to close vulnerabilities.
- Consider enabling server passwords, permissions, and banning policies to reduce unauthorized access.
- Use rate limiting and intrusion detection systems to identify and counteract DDoS attacks.
- Employ VPN tunneling or additional encryption layers if confidentiality is a concern, as voice traffic itself is typically unencrypted.
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the 8 most looked-up other ports in gaming — 124 ports carry that label.
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| :18200 | Audition Online Server Check | TCPUDP | Gaming | caution | 20.9k |
| :12345 | NetBus / NetBuster | Security | caution | 19.9k | |
| :18206 | Audition FAM DB | TCPUDP | Databases | caution | 19.1k |
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risk mix of the 8 listed
- caution100%
0 of 8 encrypted