Port 5437Proxy Mobile IPv6 Data

UDP port 5437 carries data-plane traffic in Proxy Mobile IPv6 tunnels between mobility gateways and local mobility anchors.

inNetwork Services

transport: udp
in transit: cleartext
assignment: official
risk: 3/10
lookups: 0

also known as pmip6-data, PMIPv6 data tunnel

Technical Details

what runs on :5437

UDP 5437 is assigned to the PMIPv6 data plane: it carries tunneled user packets between PMIPv6 tunnel endpoints, typically a MAG and an LMA. It is a tunnel transport rather than a request-response application protocol, so it has no separate TCP-style connection handshake; tunnel state is established through PMIPv6 control procedures. The companion registered port 5436 is for PMIPv6 control-plane traffic. The encapsulation provides tunneling, not encryption.

Security Information

exposure of :5437

risk score

3/ 10caution

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

network services averages 2.6 across 1,643 ports — this one sits 0.4 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

udp

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

security overview

This port should normally be reachable only between authorized PMIPv6 tunnel peers, not exposed broadly to the internet. Since the tunnel is not encrypted by default, an exposed or misconfigured endpoint may allow traffic injection or expose tunneled traffic; restrict peer addresses and apply the deployment’s authentication and network controls.

Record

iana registry entry

port: :5437
service: Proxy Mobile IPv6 Data
transport: UDP
encryption: cleartext
assignment: iana registered
risk: 3/10caution
category: Network Services
usage: This port is for UDP-encapsulated data traffic in Proxy Mobile IPv6 (PMIPv6), a network-based mobility protocol. Engineers are most likely to encounter it on mobile-network infrastructure between a Mobile Access Gateway (MAG) and a Local Mobility Anchor (LMA), not as a general-purpose application service.
lookups: 0rank 993
added: 2026-10-08
updated: 2026-10-08
references: IANA service name registry — port 5437
RFC 5844

Something wrong?

This record is maintained by the engineers who use port 5437. 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 2026-10-08.

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 1,643 in network services →

the 8 most looked-up other ports in network services — 1,643 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 :5437Proxy Mobile IPv6 Data

Technical Details

Security Information

Related Ports

Port 5437Proxy Mobile IPv6 Data