CyberHunter
Local dataset, no network
// Other services

Port 3960: Bess Peer Assessment

Port 3960 is assigned by IANA to bess (Bess Peer Assessment).

3960

How bess works

Other services
client:3960bessresponse client:3960bessresponse

The client sends a request to port 3960 and the bess 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 3960 dangerous?

We have no specific security note for port 3960. 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 3960

ServicePortTransportDescriptionReferenceUpdated
bess 3960 TCP, UDP Bess Peer Assessment - 2005-08

// source: IANA service name and port number registry

03 Check it

Which program uses port 3960, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3960'      # process listening on 3960
sudo lsof -nP -i :3960

macOS

sudo lsof -nP -i :3960

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3960 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3960
netstat -ano | findstr :3960

From another machine

nmap -p 3960 -sV <host>
sudo nmap -sU -p 3960 <host>
nc -zv <host> 3960

Block it in the firewall

sudo ufw deny 3960/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3960" -Direction Inbound -LocalPort 3960 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3960 used for?

Port 3960 is assigned by IANA to bess (Bess Peer Assessment).

Is port 3960 TCP or UDP?

Port 3960 is registered for TCP and UDP.

Is it safe to open port 3960?

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 3960 is open?

On Linux run "ss -ltnup 'sport = :3960'", on macOS "lsof -nP -i :3960", and on Windows "netstat -ano | findstr :3960" to see the local process. From another machine, "nmap -p 3960 <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

Latest vulnerability news

All news