30303
Ethereum P2P
Low RiskTCP/UDP — Other
Port Overview
Port Number
30303
Service Name
Ethereum P2P
Transport Protocol
TCP/UDP
Category
Other
Security Risk
Low
Port Range
Registered (1024-49151)
What is Port 30303?
Default peer-to-peer networking port for Ethereum nodes running Geth and other Ethereum clients. Used for block and transaction propagation across the Ethereum network. Both TCP (connections) and UDP (discovery) are used.
TCP/UDP
Other
Commonly Used
Security Considerations
Port 30303 (Ethereum 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.