18333
Bitcoin Testnet P2P
Low RiskTCP — Other
Port Overview
Port Number
18333
Service Name
Bitcoin Testnet P2P
Transport Protocol
TCP
Category
Other
Security Risk
Low
Port Range
Registered (1024-49151)
What is Port 18333?
Used for Bitcoin testnet peer-to-peer network communication between nodes. Testnet is used by developers to test Bitcoin transactions without using real BTC. The mainnet P2P port is 8333; this port mirrors that function for the test environment.
TCP
Other
Security Considerations
Port 18333 (Bitcoin Testnet P2P) is classified as low risk. This service uses encryption or has a minimal attack surface, making it relatively safe to expose.
Recommendation: Standard security practices apply. Keep software updated and monitor access.