CyberHunter
Local dataset, no network
// Other services

Port 3601: Visinet Gui

Port 3601 is assigned by IANA to visinet-gui (Visinet Gui).

3601

How visinet-gui works

Other services
client:3601visinet-guiresponse client:3601visinet-guiresponse

The client sends a request to port 3601 and the visinet-gui 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 3601 dangerous?

We have no specific security note for port 3601. 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 3601

ServicePortTransportDescriptionReferenceUpdated
visinet-gui 3601 TCP, UDP Visinet Gui - 2002-09

// source: IANA service name and port number registry

03 Check it

Which program uses port 3601, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3601'      # process listening on 3601
sudo lsof -nP -i :3601

macOS

sudo lsof -nP -i :3601

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3601 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3601
netstat -ano | findstr :3601

From another machine

nmap -p 3601 -sV <host>
sudo nmap -sU -p 3601 <host>
nc -zv <host> 3601

Block it in the firewall

sudo ufw deny 3601/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3601" -Direction Inbound -LocalPort 3601 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3601 used for?

Port 3601 is assigned by IANA to visinet-gui (Visinet Gui).

Is port 3601 TCP or UDP?

Port 3601 is registered for TCP and UDP.

Is it safe to open port 3601?

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 3601 is open?

On Linux run "ss -ltnup 'sport = :3601'", on macOS "lsof -nP -i :3601", and on Windows "netstat -ano | findstr :3601" to see the local process. From another machine, "nmap -p 3601 <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

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