Port 434Mobile IP agent

Mobile IPv4 home and foreign agents use port 434 for mobility registration signaling.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 4/10
lookups: 0

also known as Mobile IPv4

Technical Details

what runs on :434

Mobile IPv4 uses UDP port 434 for registration signaling between a mobile node and a foreign or home agent. Registration requests and replies are exchanged as protocol messages over UDP; agent discovery itself uses ICMP Router Discovery messages with Mobile IP extensions rather than this port. The signaling is not encrypted by default, though Mobile IP authentication extensions and IPsec can provide integrity or confidentiality.

Security Information

exposure of :434

risk score

4/ 10caution

worth attention. how exposed you are depends on configuration — don't leave it reachable from the internet without a reason.

network services averages 3.9 across 623 ports — this one sits 0.1 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 · udp

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

security overview

Mobile IP registration must be authenticated in a correctly configured deployment, but exposed agents can still receive spoofed or resource-exhaustion traffic and may be targeted to disrupt mobility registration. This specialized service should normally be restricted to expected mobility peers and should not be exposed broadly to the public Internet.

Record

iana registry entry

port: :434
service: Mobile IP agent
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 4/10caution
category: Network Services Mobile
usage: Mobile IPv4 home agents and foreign agents use this port to exchange registration requests and replies with roaming mobile nodes. Engineers typically encounter it on specialized mobility infrastructure rather than ordinary hosts; the IANA assignment covers both TCP and UDP, although standard Mobile IPv4 signaling uses UDP.
lookups: 0rank 994
added: 2026-08-20
updated: 2026-08-20
references: IANA service name registry — port 434

Something wrong?

This record is maintained by the engineers who use port 434. 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 2026-08-20.

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

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all 623 in network services →

the 8 most looked-up other ports in network services — 623 ports carry that label.

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:3268	Microsoft Global Catalog (GC)	TCPUDP	Security	caution	54.6k
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:3128	Tatsoft Default HTTP Proxy	TCP	Web Services	caution	46.8k

risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :434Mobile IP agent

Technical Details

Security Information

Related Ports

Port 434Mobile IP agent