6881
BitTorrent
Medium RiskTCP/UDP — File Transfer
Port Overview
Port Number
6881
Service Name
BitTorrent
Transport Protocol
TCP/UDP
Category
File Transfer
Security Risk
Medium
Port Range
Registered (1024-49151)
What is Port 6881?
Port 6881 is the first in the default range (6881-6889) used by BitTorrent clients for peer-to-peer file transfer. BitTorrent uses this range for incoming connections from peers sharing the same file. Many ISPs and corporate networks block this port range to limit bandwidth consumption from P2P applications.
TCP/UDP
File Transfer
Commonly Used
Security Considerations
Port 6881 (BitTorrent) is classified as medium risk. While this service is commonly exposed, consider using encrypted alternatives where available.
Recommendation: Keep the service updated. Monitor logs for unusual activity.