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// Other services

Port 3597: A14 (AN-to-SC/MM)

Port 3597 is assigned by IANA to a14 (A14 (AN-to-SC/MM)).

3597

How a14 works

Other services
client:3597a14response client:3597a14response

The client sends a request to port 3597 and the a14 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 3597 dangerous?

We have no specific security note for port 3597. 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 3597

ServicePortTransportDescriptionReferenceUpdated
a14 3597 TCP, UDP A14 (AN-to-SC/MM) - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3597, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3597'      # process listening on 3597
sudo lsof -nP -i :3597

macOS

sudo lsof -nP -i :3597

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3597 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3597
netstat -ano | findstr :3597

From another machine

nmap -p 3597 -sV <host>
sudo nmap -sU -p 3597 <host>
nc -zv <host> 3597

Block it in the firewall

sudo ufw deny 3597/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3597" -Direction Inbound -LocalPort 3597 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3597 used for?

Port 3597 is assigned by IANA to a14 (A14 (AN-to-SC/MM)).

Is port 3597 TCP or UDP?

Port 3597 is registered for TCP and UDP.

Is it safe to open port 3597?

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 3597 is open?

On Linux run "ss -ltnup 'sport = :3597'", on macOS "lsof -nP -i :3597", and on Windows "netstat -ano | findstr :3597" to see the local process. From another machine, "nmap -p 3597 <host>" shows whether it is reachable.

05 Related
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