CyberHunter
Local dataset, no network
// Other services

Port 3877: XMPCR Interface Port

Port 3877 is assigned by IANA to xmpcr-interface (XMPCR Interface Port).

3877

How xmpcr-interface works

Other services
client:3877xmpcr-interfaceresponse client:3877xmpcr-interfaceresponse

The client sends a request to port 3877 and the xmpcr-interface 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 3877 dangerous?

We have no specific security note for port 3877. 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 3877

ServicePortTransportDescriptionReferenceUpdated
xmpcr-interface 3877 TCP, UDP XMPCR Interface Port - 2003-10

// source: IANA service name and port number registry

03 Check it

Which program uses port 3877, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3877'      # process listening on 3877
sudo lsof -nP -i :3877

macOS

sudo lsof -nP -i :3877

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3877 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3877
netstat -ano | findstr :3877

From another machine

nmap -p 3877 -sV <host>
sudo nmap -sU -p 3877 <host>
nc -zv <host> 3877

Block it in the firewall

sudo ufw deny 3877/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3877" -Direction Inbound -LocalPort 3877 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3877 used for?

Port 3877 is assigned by IANA to xmpcr-interface (XMPCR Interface Port).

Is port 3877 TCP or UDP?

Port 3877 is registered for TCP and UDP.

Is it safe to open port 3877?

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 3877 is open?

On Linux run "ss -ltnup 'sport = :3877'", on macOS "lsof -nP -i :3877", and on Windows "netstat -ano | findstr :3877" to see the local process. From another machine, "nmap -p 3877 <host>" shows whether it is reachable.

05 Related
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