Network configuration - Polygon Developer Docs

The tables below list the default ports used by Bor and Heimdall nodes. These ports govern peer connections, RPC access, monitoring endpoints, and peer discovery.

Bor node

Name	Port	Protocol	Tags	Description
Network Listening Port	30303	TCP + UDP	Public	Bor P2P. TCP for peer connections and synchronization (RLPx); UDP for peer discovery. Open both.
RPC Server	8545	TCP	Can be Public, Internal	RPC port for sending transactions and fetching data. Heimdall uses this port to obtain Bor headers.
WebSocket Server	8546	TCP	Can be Public, Internal	WebSocket port for real-time updates.
GraphQL Server	8547	TCP	Internal	GraphQL port for querying data.
Prometheus Server	9091	TCP	Can be Public, Monitoring	Prometheus APIs for Grafana data source. Can be mapped to ports 80/443 via an Nginx reverse proxy.
Grafana Server	3001	TCP	Can be Public, Monitoring	Grafana web server. Can be mapped to ports 80/443 via an Nginx reverse proxy.
Pprof Server	7071	TCP	Internal, Monitoring	Pprof server for collecting Bor metrics.
Bootnode Discovery	30301	UDP	Internal	Default discovery port of the standalone `bootnode` binary only. Not used by Bor sentry or validator nodes.

Heimdall node

Heimdall runs on CometBFT and the Cosmos SDK, so its ports differ from Bor’s.

Name	Port	Protocol	Tags	Description
P2P Port	26656	TCP	Public	CometBFT peer-to-peer port for connecting to other Heimdall nodes and synchronization.
RPC Server	26657	TCP	Can be Public, Internal	CometBFT RPC endpoint for queries and submitting transactions. Bound to localhost by default.
REST API	1317	TCP	Can be Public, Internal	Cosmos SDK REST (LCD) API for querying Heimdall state over HTTP.
gRPC Server	9090	TCP	Internal	Cosmos SDK gRPC endpoint for querying Heimdall state. Bound to localhost by default.
Prometheus Server	26660	TCP	Can be Public, Monitoring	CometBFT Prometheus metrics endpoint for monitoring.
Pprof Server	6060	TCP	Internal, Monitoring	Pprof server for collecting Heimdall runtime metrics.