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// Other services

Port 2852: bears-01

Port 2852 is assigned by IANA to bears-01 (bears-01).

2852

How bears-01 works

Other services
client:2852bears-01response client:2852bears-01response

The client sends a request to port 2852 and the bears-01 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 2852 dangerous?

We have no specific security note for port 2852. 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 2852

ServicePortTransportDescriptionReferenceUpdated
bears-01 2852 TCP, UDP bears-01 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2852, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2852'      # process listening on 2852
sudo lsof -nP -i :2852

macOS

sudo lsof -nP -i :2852

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2852 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2852
netstat -ano | findstr :2852

From another machine

nmap -p 2852 -sV <host>
sudo nmap -sU -p 2852 <host>
nc -zv <host> 2852

Block it in the firewall

sudo ufw deny 2852/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2852" -Direction Inbound -LocalPort 2852 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2852 used for?

Port 2852 is assigned by IANA to bears-01 (bears-01).

Is port 2852 TCP or UDP?

Port 2852 is registered for TCP and UDP.

Is it safe to open port 2852?

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 2852 is open?

On Linux run "ss -ltnup 'sport = :2852'", on macOS "lsof -nP -i :2852", and on Windows "netstat -ano | findstr :2852" to see the local process. From another machine, "nmap -p 2852 <host>" shows whether it is reachable.

05 Related
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