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// Other services

Port 2877: BLUELANCE

Port 2877 is assigned by IANA to bluelance (BLUELANCE).

2877

How bluelance works

Other services
client:2877bluelanceresponse client:2877bluelanceresponse

The client sends a request to port 2877 and the bluelance 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 2877 dangerous?

We have no specific security note for port 2877. 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 2877

ServicePortTransportDescriptionReferenceUpdated
bluelance 2877 TCP, UDP BLUELANCE - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2877, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2877'      # process listening on 2877
sudo lsof -nP -i :2877

macOS

sudo lsof -nP -i :2877

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2877 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2877
netstat -ano | findstr :2877

From another machine

nmap -p 2877 -sV <host>
sudo nmap -sU -p 2877 <host>
nc -zv <host> 2877

Block it in the firewall

sudo ufw deny 2877/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2877" -Direction Inbound -LocalPort 2877 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2877 used for?

Port 2877 is assigned by IANA to bluelance (BLUELANCE).

Is port 2877 TCP or UDP?

Port 2877 is registered for TCP and UDP.

Is it safe to open port 2877?

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 2877 is open?

On Linux run "ss -ltnup 'sport = :2877'", on macOS "lsof -nP -i :2877", and on Windows "netstat -ano | findstr :2877" to see the local process. From another machine, "nmap -p 2877 <host>" shows whether it is reachable.

05 Related
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