Port 8530WSUS

Default HTTP port for Windows Server Update Services (WSUS) client-server communication.

transport: tcp
in transit: cleartext
assignment: unofficial
risk: 6/10
lookups: 0

Technical Details

what runs on :8530

WSUS uses HTTP over TCP on port 8530 by default; its corresponding default HTTPS port is TCP 8531. The service is hosted by IIS and provides WSUS client-server web services and update content; administrators can configure different ports. Traffic on 8530 is not encrypted by default.

Security Information

exposure of :8530

risk score

6/ 10risk

treat as sensitive. widely scanned and regularly exploited when reachable — restrict it to known sources.

security averages 3.1 across 360 ports — this one sits 2.9 above.

in transit

cleartext

credentials and payloads are readable by anyone on path

assignment

unofficial

used by convention, not registered — what answers here varies by deployment

reachable over

tcp

every listening transport is another surface to filter at the edge

security overview

This port is generally intended for managed clients on trusted internal networks, not direct internet exposure. Because HTTP traffic is unencrypted, it can be intercepted or altered on an untrusted path; compromise of a WSUS server can also affect the updates delivered to its clients. Restrict access to authorized management networks and use the HTTPS configuration when appropriate.

Record

iana registry entry

port: :8530
service: WSUS
transport: TCP
encryption: cleartext
assignment: convention only
risk: 6/10risk
category: Security Network Services
usage: WSUS servers use TCP port 8530 by default for HTTP communication with managed Windows clients. Engineers commonly see it on internal networks where clients obtain update metadata and content from an organization’s WSUS server.
lookups: 0rank 993
added: 2026-10-01
updated: 2026-10-01
references: Configure WSUS

Something wrong?

This record is maintained by the engineers who use port 8530. 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 2026-10-01.

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edit this record →back to the registry

Related Ports

all 360 in security →

the 8 most looked-up other ports in security — 360 ports carry that label.

port	service	proto	category	risk	views
:8881	Atlasz Secure Server	TCP	Web Services	caution	67.6k
:443	HTTPS	TCPtls	Web Services	caution	65.9k
:8291	Winbox MikroTik Admin	TCP	Security	caution	62.9k
:3268	Microsoft Global Catalog (GC)	TCPUDP	Security	caution	54.6k
:135	Microsoft EPMAP	TCPUDP	Security	caution	51.9k
:3128	Squid Proxy HTTP	TCP	Web Services	caution	45.8k
:8080	HTTP Alternate	TCP	Web Services	caution	44.9k
:7000	Vuze HTTPS Tracker	TCPtls	Security	caution	28.9k

risk mix of the 8 listed

caution100%

2 of 8 encrypted

Port :8530WSUS

Technical Details

Security Information

Related Ports

Port 8530WSUS