Port 5320BSF Zn Web Services

TCP 5320 is assigned to the web-services Zn interface used by a 3GPP Bootstrapping Server Function.

transport: tcp
in transit: cleartext
assignment: official
risk: 5/10
lookups: 0

also known as bsfserver-zn, 3GPP Zn interface

Technical Details

what runs on :5320

TCP port 5320 is assigned to the web-services-based Zn interface of a 3GPP BSF. Zn lets a NAF obtain bootstrapping-related information from the BSF for use in Generic Bootstrapping Architecture; the interface is a request/response web service rather than a user-facing site. Web-service implementations use HTTP-based messages (commonly SOAP/XML); the registry assignment does not specify a universal HTTP version, message framing profile, or TLS requirement, so those depend on the implementation.

Security Information

exposure of :5320

risk score

5/ 10caution

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

web services averages 3.1 across 198 ports — this one sits 1.9 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

This interface belongs on a trusted operator network, not exposed directly to the internet. BSF responses can contain security-sensitive bootstrapping material, so an exposed or poorly authenticated endpoint could disclose information useful to an unauthorized NAF; restrict access to trusted peers and protect traffic with the deployment's supported transport security.

Record

iana registry entry

port: :5320
service: BSF Zn Web Services
transport: TCP
encryption: cleartext
assignment: iana registered
risk: 5/10caution
category: Web Services Network Services
usage: The assignment is for a web-services interface between a Bootstrapping Server Function (BSF) and a Network Application Function (NAF) in 3GPP Generic Bootstrapping Architecture. It is a specialized telecom-network interface, not a general-purpose web service, and is not commonly encountered on public internet scans.
lookups: 0rank 993
added: 2026-10-07
updated: 2026-10-07
references: IANA service name registry — port 5320

Something wrong?

This record is maintained by the engineers who use port 5320. 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 2026-10-07.

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edit this record →back to the registry

Related Ports

all 198 in web services →

the 8 most looked-up other ports in web services — 198 ports carry that label.

port	service	proto	category	risk	views
:8888	Sun Answerbook & Alt HTTP	TCP	Web Services	caution	123.9k
:8000	Intel Remote Desktop / Alternate HTTP Port	TCP	Web Services	safe	84.3k
:8888	NewsEDGE	TCPUDP	Web Services	caution	83.3k
:8888	HTTP Alternative Port	TCP	Web Services	caution	76.5k
:8888	GNUmp3d Streaming HTTP	TCP	Web Services	caution	76.3k
:9080	Groove RPC	TCPUDP	Web Services	caution	70.8k
:8881	Atlasz Secure Server	TCP	Web Services	caution	67.6k
:80	HTTP	TCPUDP	Web Services	caution	67.3k

risk mix of the 8 listed

safe13%
caution88%

0 of 8 encrypted

Port :5320BSF Zn Web Services

Technical Details

Security Information

Related Ports

Port 5320BSF Zn Web Services