CyberHunter
Local dataset, no network
// Other services

Port 3512: Aztec Distribution Port

Port 3512 is assigned by IANA to aztec (Aztec Distribution Port).

3512

How aztec works

Other services
client:3512aztecresponse client:3512aztecresponse

The client sends a request to port 3512 and the aztec 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 3512 dangerous?

We have no specific security note for port 3512. 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 3512

ServicePortTransportDescriptionReferenceUpdated
aztec 3512 TCP, UDP Aztec Distribution Port - 2002-05

// source: IANA service name and port number registry

03 Check it

Which program uses port 3512, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3512'      # process listening on 3512
sudo lsof -nP -i :3512

macOS

sudo lsof -nP -i :3512

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3512 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3512
netstat -ano | findstr :3512

From another machine

nmap -p 3512 -sV <host>
sudo nmap -sU -p 3512 <host>
nc -zv <host> 3512

Block it in the firewall

sudo ufw deny 3512/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3512" -Direction Inbound -LocalPort 3512 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3512 used for?

Port 3512 is assigned by IANA to aztec (Aztec Distribution Port).

Is port 3512 TCP or UDP?

Port 3512 is registered for TCP and UDP.

Is it safe to open port 3512?

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 3512 is open?

On Linux run "ss -ltnup 'sport = :3512'", on macOS "lsof -nP -i :3512", and on Windows "netstat -ano | findstr :3512" to see the local process. From another machine, "nmap -p 3512 <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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