RPC and service APIs ports
Overview
RPC services often skip authentication because they assume a trusted network. Require TLS and caller authentication, and never expose internal RPC endpoints publicly.
Ports in this category14
Range coveredAll registry ranges
All RPC and service APIs port numbers
Every port below is assigned to this category in the registry or by a widely used convention. Open a port for its check and block commands, risk rating and troubleshooting notes.
| Port | Service | Transport | Risk | Description |
|---|---|---|---|---|
| 111 | SUNRPC | TCP / UDP | High | SUN Remote Procedure Call |
| 121 | ERPC | TCP / UDP | Standard/Low | Encore Expedited Remote Pro.Call |
| 369 | RPC2PORTMAP | TCP / UDP | Standard/Low | rpc2portmap |
| 530 | COURIER | TCP / UDP | Standard/Low | rpc |
| 567 | BANYAN-RPC | TCP / UDP | Standard/Low | banyan-rpc |
| 593 | HTTP-RPC-EPMAP | TCP / UDP | Standard/Low | HTTP RPC Ep Map |
| 602 | XMLRPC-BEEP | TCP / UDP | Standard/Low | XML-RPC over BEEP |
| 4317 | OPENTELEMETRY OTLP GRPC | TCP | Standard/Low | OpenTelemetry Protocol (OTLP) gRPC receiver port (community convention; not IANA-assigned) |
| 5474 | APSOLAB-RPC | UDP | Standard/Low | The Apsolab company's status query protocol |
| 8117 | PURITYRPC | TCP | Standard/Low | Purity replication clustering and remote management |
| 8710 | SEMI-GRPC | TCP | Standard/Low | gRPC for SEMI Standards implementations |
| 9339 | GNMI-GNOI | TCP | Standard/Low | gRPC Network Mgmt/Operations Interface |
| 13832 | A-TRUST-RPC | TCP | Standard/Low | Certificate Management and Issuing |
| 50051 | GRPC | TCP | Medium | Common default port for gRPC servers using HTTP/2 |
Other categories
Authentication and access 19Caching and in-memory stores 10Containers and orchestration 10DNS and naming 10Databases 54Development servers 13Directory services 14Email 26File transfer and sharing 27Gaming 6Infrastructure and administration 30IoT and device telemetry 7Message queues and streaming 17Monitoring and metrics 29Networking and proxies 31Printing 19Remote access 29Time synchronization 10VPN and tunnelling 10Voice and real-time media 29Web and HTTP 62Windows networking 14
Primary data: IANA Service Name and Transport Protocol Port Number Registry, plus clearly marked community conventions.
Last reviewed 2026-10-30 · Methodology · About · Privacy