Port 6881: BitTorrent
Port 6881 is the first port in the range from 6881 to 6999 that BitTorrent clients traditionally listen on for incoming peer connections. Most modern clients also negotiate other ports via UPnP, but 6881 remains the conventional default.
| Port number | 6881 |
|---|---|
| Service | BitTorrent peer-to-peer file sharing |
| Protocol | TCP/UDP |
| Category | File transfer |
| Default encryption | No |
Frequently asked questions
What is port 6881 used for?
Port 6881 is the first port in the range from 6881 to 6999 that BitTorrent clients traditionally listen on for incoming peer connections. Most modern clients also negotiate other ports via UPnP, but 6881 remains the conventional default.
Is port 6881 TCP or UDP?
Port 6881 (BitTorrent) uses TCP/UDP.
Is port 6881 secure?
Port 6881 is not encrypted by default. Where possible, use an encrypted alternative or tunnel it over TLS or a VPN.
Should I open port 6881 on my firewall?
Only if you specifically need BitTorrent. Expose it to the smallest set of trusted sources, and never open database or Windows-service ports to the whole internet.