8545
Ethereum JSON-RPC
Critical RiskTCP — Other
Port Overview
Port Number
8545
Service Name
Ethereum JSON-RPC
Transport Protocol
TCP
Category
Other
Security Risk
Critical
Port Range
Registered (1024-49151)
What is Port 8545?
Port 8545 is the default JSON-RPC port for Ethereum nodes (go-ethereum/geth and others) for interacting with the Ethereum blockchain. DApps, wallets, and Web3 developers use this port to query blockchain state and submit transactions. Publicly exposing this port without authentication has resulted in theft of Ethereum from hot wallets.
TCP
Other
Commonly Used
Security Considerations
Port 8545 (Ethereum JSON-RPC) is classified as critical risk. This port should not be exposed to the public internet. The service transmits data without encryption, making it vulnerable to eavesdropping, credential theft, and man-in-the-middle attacks.
Recommendation: Block this port at the firewall. Use encrypted alternatives (SSH, SFTP, HTTPS) instead.