Port 2029Hot Standby Router Protocol IPv6

HSRPv6 provides first-hop router redundancy between IPv6 routers on a local network.

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

also known as hsrpv6, HSRP for IPv6

Technical Details

what runs on :2029

HSRPv6 normally exchanges control messages over UDP port 2029, using IPv6 link-local multicast on the local segment; the IANA assignment also lists TCP, although HSRP does not normally establish TCP sessions. Routers advertise their state, priority, virtual gateway information, and hello and hold timers, electing an active and standby router and sending periodic hellos. Typical HSRP defaults are a 3-second hello interval and a 10-second hold time. IPv4 HSRP conventionally uses UDP port 1985.

Security Information

exposure of :2029

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 2.7 across 1,259 ports — this one sits 0.7 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

HSRPv6 is not encrypted and is intended for a trusted local link rather than the public Internet. An attacker able to inject or spoof HSRP traffic on the segment may cause failover, disrupt gateway service, or attempt to become the active router; restrict it to router-facing interfaces and use available authentication and control-plane protections.

Record

iana registry entry

port: :2029
service: Hot Standby Router Protocol IPv6
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 2/10safe
category: Network Services System
usage: Cisco routers and Layer 3 switches use HSRPv6 to share a virtual IPv6 gateway, allowing a standby router to assume forwarding when the active router fails. Engineers typically encounter it only on internal LAN or VLAN segments, not as an Internet-facing service.
lookups: 0rank 994
added: 2026-09-20
updated: 2026-09-20
references: IANA service name registry — port 2029

Something wrong?

This record is maintained by the engineers who use port 2029. 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 2026-09-20.

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

Related Ports

all 1,259 in network services →

the 8 most looked-up other ports in network services — 1,259 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 :2029Hot Standby Router Protocol IPv6

Technical Details

Security Information

Related Ports

Port 2029Hot Standby Router Protocol IPv6