Port 5361Windows SideShow Secure Protocol

Port 5361 is assigned to secure communications between Windows SideShow and compatible auxiliary displays.

transport: tcp · udp
in transit: encrypted
assignment: official
risk: 1/10
lookups: 0

also known as ms-s-sideshow

Technical Details

what runs on :5361

IANA assigns this service on both TCP and UDP for the Secure Protocol for Windows SideShow. SideShow was a Windows platform for delivering information to auxiliary displays; this port is associated with communication between the PC-side service and compatible devices. The assignment identifies it as secure, but does not specify a TLS version, handshake, message framing, or whether TCP and UDP use identical protocol behavior.

Security Information

exposure of :5361

risk score

1/ 10safe

routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.

system averages 2.7 across 954 ports — this one sits 1.7 below.

in transit

encrypted

payloads are protected on the wire

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

SideShow is a legacy, uncommon feature, and this port has not appeared open in the cited internet-wide scan data. It should not be exposed publicly: allow it only where a SideShow device actually needs to communicate, and investigate unexpected listeners, especially on unsupported or obsolete Windows systems. The secure-protocol designation alone does not establish the implementation's authentication or cryptographic strength.

Record

iana registry entry

port: :5361
service: Windows SideShow Secure Protocol
transport: TCPUDP
encryption: tls / encrypted
assignment: iana registered
risk: 1/10safe
category: System IoT
usage: This is a legacy Windows SideShow service for connecting a Windows PC to compatible secondary displays and information devices. Engineers are more likely to encounter it on older Windows systems or dedicated SideShow hardware than on current general-purpose hosts.
lookups: 0rank 993
added: 2026-10-07
updated: 2026-10-07
references: IANA service name registry — port 5361

Something wrong?

This record is maintained by the engineers who use port 5361. 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.

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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risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :5361Windows SideShow Secure Protocol

Technical Details

Security Information

Related Ports

Port 5361Windows SideShow Secure Protocol