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// Other services

Port 7871: Mobile Device Management

Port 7871 is assigned by IANA to mdm (Mobile Device Management).

7871

How mdm works

Other services
client:7871mdmresponse client:7871mdmresponse

The client sends a request to port 7871 and the mdm service answers.

Transport
TCP
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 7871 dangerous?

We have no specific security note for port 7871. 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 7871

ServicePortTransportDescriptionReferenceUpdated
mdm 7871 TCP Mobile Device Management - 2011-08-15
-7871-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 7871, and is it reachable?

Linux

sudo ss -ltnup 'sport = :7871'      # process listening on 7871
sudo lsof -nP -i :7871

macOS

sudo lsof -nP -i :7871

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 7871 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 7871
netstat -ano | findstr :7871

From another machine

nmap -p 7871 -sV <host>
nc -zv <host> 7871

Block it in the firewall

sudo ufw deny 7871/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 7871" -Direction Inbound -LocalPort 7871 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 7871 used for?

Port 7871 is assigned by IANA to mdm (Mobile Device Management).

Is port 7871 TCP or UDP?

Port 7871 is registered for TCP.

Is it safe to open port 7871?

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 7871 is open?

On Linux run "ss -ltnup 'sport = :7871'", on macOS "lsof -nP -i :7871", and on Windows "netstat -ano | findstr :7871" to see the local process. From another machine, "nmap -p 7871 <host>" shows whether it is reachable.

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