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// Other services

Port 5722: Microsoft DFS Replication Service

Port 5722 is assigned by IANA to msdfsr (Microsoft DFS Replication Service).

5722

How msdfsr works

Other services
client:5722msdfsrresponse client:5722msdfsrresponse

The client sends a request to port 5722 and the msdfsr 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 5722 dangerous?

We have no specific security note for port 5722. 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 5722

ServicePortTransportDescriptionReferenceUpdated
msdfsr 5722 TCP, UDP Microsoft DFS Replication Service - 2006-03

// source: IANA service name and port number registry

03 Check it

Which program uses port 5722, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5722'      # process listening on 5722
sudo lsof -nP -i :5722

macOS

sudo lsof -nP -i :5722

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5722 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5722
netstat -ano | findstr :5722

From another machine

nmap -p 5722 -sV <host>
sudo nmap -sU -p 5722 <host>
nc -zv <host> 5722

Block it in the firewall

sudo ufw deny 5722/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5722" -Direction Inbound -LocalPort 5722 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5722 used for?

Port 5722 is assigned by IANA to msdfsr (Microsoft DFS Replication Service).

Is port 5722 TCP or UDP?

Port 5722 is registered for TCP and UDP.

Is it safe to open port 5722?

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 5722 is open?

On Linux run "ss -ltnup 'sport = :5722'", on macOS "lsof -nP -i :5722", and on Windows "netstat -ano | findstr :5722" to see the local process. From another machine, "nmap -p 5722 <host>" shows whether it is reachable.

05 Related
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp

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