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// Other services

Port 3676: VisualAge Pacbase server

Port 3676 is assigned by IANA to va-pacbase (VisualAge Pacbase server).

3676

How va-pacbase works

Other services
client:3676va-pacbaseresponse client:3676va-pacbaseresponse

The client sends a request to port 3676 and the va-pacbase 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 3676 dangerous?

We have no specific security note for port 3676. 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 3676

ServicePortTransportDescriptionReferenceUpdated
va-pacbase 3676 TCP, UDP VisualAge Pacbase server - 2003-01

// source: IANA service name and port number registry

03 Check it

Which program uses port 3676, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3676'      # process listening on 3676
sudo lsof -nP -i :3676

macOS

sudo lsof -nP -i :3676

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3676 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3676
netstat -ano | findstr :3676

From another machine

nmap -p 3676 -sV <host>
sudo nmap -sU -p 3676 <host>
nc -zv <host> 3676

Block it in the firewall

sudo ufw deny 3676/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3676" -Direction Inbound -LocalPort 3676 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3676 used for?

Port 3676 is assigned by IANA to va-pacbase (VisualAge Pacbase server).

Is port 3676 TCP or UDP?

Port 3676 is registered for TCP and UDP.

Is it safe to open port 3676?

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 3676 is open?

On Linux run "ss -ltnup 'sport = :3676'", on macOS "lsof -nP -i :3676", and on Windows "netstat -ano | findstr :3676" to see the local process. From another machine, "nmap -p 3676 <host>" shows whether it is reachable.

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