Port 346Zebra server

Zebra server routing-control protocol used by routing daemons to exchange routes and interface information.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 2/10
lookups: 0

also known as zserv, GNU Zebra, Quagga zserv, FRRouting zserv

Technical Details

what runs on :346

zserv is a binary routing-daemon control protocol, normally carried over TCP; the IANA assignment lists both TCP and UDP, but conventional Zebra-family implementations use a TCP listening socket. Messages have a compact binary header containing length, marker/version information, and a command, followed by route, interface, or notification data. The commonly documented Zebra default is TCP 2600, with adjacent ports historically assigned to individual routing daemons; zserv traffic is normally cleartext and is not typically protected by protocol-level encryption.

Security Information

exposure of :346

risk score

2/ 10safe

routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.

network services averages 3.3 across 818 ports — this one sits 1.3 below.

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 · udp

udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite

security overview

A reachable zserv endpoint may expose routing state and, depending on the implementation and access controls, permit interaction with the host's routing manager. It should be restricted to local or trusted routing-daemon traffic and not exposed to the public internet; even though port 346 is rarely observed, an active listener warrants identifying the implementation and reviewing its access controls.

Record

iana registry entry

port: :346
service: Zebra server
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 2/10safe
category: Network Services System
usage: This service is associated with the zserv protocol used by GNU Zebra and its descendants, including Quagga and FRRouting, for communication between routing daemons and the Zebra routing manager. Modern deployments typically use TCP port 2600 rather than 346, so an open port 346 should be verified rather than assumed to be a standard Zebra listener.
lookups: 0rank 994
added: 2026-08-29
updated: 2026-08-29
references: IANA service name registry — port 346

Something wrong?

This record is maintained by the engineers who use port 346. 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 2026-08-29.

01edit any field on a page of its own
02a model checks it for accuracy and spam
03clean and confident goes live immediately

edit this record →back to the registry

Related Ports

all 818 in network services →

the 8 most looked-up other ports in network services — 818 ports carry that label.

port	service	proto	category	risk	views
:9080	Groove RPC	TCPUDP	Web Services	caution	70.8k
:6543	Jetnet	UDP	Network Services	caution	65.3k
:5938	TeamViewer	TCPUDP	Remote Access	caution	65.0k
:8291	Winbox MikroTik Admin	TCP	Security	caution	62.9k
:3233	WhiskerControl Protocol	TCPUDP	Network Services	caution	61.9k
:3268	Microsoft Global Catalog (GC)	TCPUDP	Security	caution	54.6k
:135	Microsoft EPMAP	TCPUDP	Security	caution	51.9k
:3128	Tatsoft Default HTTP Proxy	TCP	Web Services	caution	46.8k

risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :346Zebra server

Technical Details

Security Information

Related Ports

Port 346Zebra server