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// Other services

Port 2175: Microsoft Desktop AirSync Protocol

Port 2175 is assigned by IANA to airsync (Microsoft Desktop AirSync Protocol).

2175

How airsync works

Other services
client:2175airsyncresponse client:2175airsyncresponse

The client sends a request to port 2175 and the airsync service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 2175 dangerous?

We have no specific security note for port 2175. Its risk depends on the program actually listening on it. General advice for other services services:

  • Close the port if nothing on the host needs it.
  • Identify the process that listens on it (commands below) before opening it in a firewall.
  • Expose a service only to the networks that use it.
02 Registry

IANA registry entries for port 2175

ServicePortTransportDescriptionReferenceUpdated
airsync 2175 TCP, UDP Microsoft Desktop AirSync Protocol - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2175, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2175'      # process listening on 2175
sudo lsof -nP -i :2175

macOS

sudo lsof -nP -i :2175

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2175 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2175
netstat -ano | findstr :2175

From another machine

nmap -p 2175 -sV <host>
sudo nmap -sU -p 2175 <host>
nc -zv <host> 2175

Block it in the firewall

sudo ufw deny 2175/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2175" -Direction Inbound -LocalPort 2175 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2175 used for?

Port 2175 is assigned by IANA to airsync (Microsoft Desktop AirSync Protocol).

Is port 2175 TCP or UDP?

Port 2175 is registered for TCP and UDP.

Is it safe to open port 2175?

It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Close the port if nothing on the host needs it.

How do I check if port 2175 is open?

On Linux run "ss -ltnup 'sport = :2175'", on macOS "lsof -nP -i :2175", and on Windows "netstat -ano | findstr :2175" to see the local process. From another machine, "nmap -p 2175 <host>" shows whether it is reachable.

05 Related
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