30303

peer-to-peer (P2P) networking in Ethereum blockchain

http://localhost:30303/

• Fatal: Error starting protocol stack: listen tcp :30303: bind: address already in use

op-geth, for snap sync, all op-geth nodes should expose port 30303 TCP and 30303 UDP to easily find other op-geth nodes to sync from.

INFO [08-19|19:00:21.780] Started P2P networking                    self=enode://[email protected]:30303

Related

• 8545
• 8547
• 8551
• Ethereum ports
• Polygon: Bor
• EVM

See also

• Execution clients: geth, besu, reth, Nethermind, Erigon, 30303, 8551, 8547, Prysm, Nimbus, lighthouse
• Ethereum ports: 8545, 8546, 8547, 8551, 9000, 30303, 5052, 5054