Port 9559P4Runtime

P4Runtime provides a gRPC control-plane API for configuring programmable network devices.

transport: tcp
in transit: cleartext
assignment: official
risk: 7/10
lookups: 0

also known as P4Runtime gRPC

Technical Details

what runs on :9559

P4Runtime is a gRPC API for the control plane of P4-programmable devices. It uses Protocol Buffers over gRPC, which runs over HTTP/2 on TCP; its RPCs include reading and writing forwarding state, setting the pipeline configuration, reporting capabilities, and a bidirectional stream channel for events and packet I/O. Port 9559 is the registered service port, though implementations can be configured to use another port. gRPC supports TLS, but encryption depends on the server and client configuration rather than being inherent to plaintext gRPC.

Security Information

exposure of :9559

risk score

7/ 10risk

treat as sensitive. widely scanned and regularly exploited when reachable — restrict it to known sources.

network services averages 2.6 across 1,854 ports — this one sits 4.4 above.

in transit

cleartext

credentials and payloads are readable by anyone on path

assignment

official

registered with iana for this service — scanners fingerprint it by number

reachable over

tcp

every listening transport is another surface to filter at the edge

security overview

An exposed P4Runtime endpoint can give a client control over a network device’s forwarding behavior, so unauthorized access could disrupt or redirect traffic. Do not expose it directly to the public internet; restrict access to trusted controller networks and configure TLS and suitable authentication and authorization. The protocol uses gRPC, but those protections depend on the implementation and deployment.

Record

iana registry entry

port: :9559
service: P4Runtime
transport: TCP
encryption: cleartext
assignment: iana registered
risk: 7/10risk
category: Network Services
usage: A P4Runtime server on a programmable switch or other P4 target lets a controller manage its forwarding pipeline and table entries. TCP port 9559 is the IANA-assigned port; the service is uncommon in general internet scans and is typically encountered in programmable-network deployments.
lookups: 0rank 993
added: 2026-10-15
updated: 2026-10-15
references: IANA service name registry — port 9559

Something wrong?

This record is maintained by the engineers who use port 9559. Every field on it is editable — change what's wrong, say how you know, and a reviewer publishes it, usually within a minute. Last touched 2026-10-15.

01edit any field on a page of its own
02a model checks it for accuracy and spam
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edit this record →back to the registry

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risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :9559P4Runtime

Technical Details

Security Information

Related Ports

Port 9559P4Runtime