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// Other services

Port 3965: Avanti IP to NCPE API

Port 3965 is assigned by IANA to ati-ip-to-ncpe (Avanti IP to NCPE API).

3965

How ati-ip-to-ncpe works

Other services
client:3965ati-ip-to-ncperesponse client:3965ati-ip-to-ncperesponse

The client sends a request to port 3965 and the ati-ip-to-ncpe 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 3965 dangerous?

We have no specific security note for port 3965. 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 3965

ServicePortTransportDescriptionReferenceUpdated
ati-ip-to-ncpe 3965 TCP, UDP Avanti IP to NCPE API - 2005-08

// source: IANA service name and port number registry

03 Check it

Which program uses port 3965, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3965'      # process listening on 3965
sudo lsof -nP -i :3965

macOS

sudo lsof -nP -i :3965

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3965 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3965
netstat -ano | findstr :3965

From another machine

nmap -p 3965 -sV <host>
sudo nmap -sU -p 3965 <host>
nc -zv <host> 3965

Block it in the firewall

sudo ufw deny 3965/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3965" -Direction Inbound -LocalPort 3965 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3965 used for?

Port 3965 is assigned by IANA to ati-ip-to-ncpe (Avanti IP to NCPE API).

Is port 3965 TCP or UDP?

Port 3965 is registered for TCP and UDP.

Is it safe to open port 3965?

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 3965 is open?

On Linux run "ss -ltnup 'sport = :3965'", on macOS "lsof -nP -i :3965", and on Windows "netstat -ano | findstr :3965" to see the local process. From another machine, "nmap -p 3965 <host>" shows whether it is reachable.

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