CyberHunter
Local dataset, no network
// Other services

Port 4598: A16 (AN-AN)

Port 4598 is assigned by IANA to a16-an-an (A16 (AN-AN)).

4598

How a16-an-an works

Other services
client:4598a16-an-anresponse client:4598a16-an-anresponse

The client sends a request to port 4598 and the a16-an-an 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 4598 dangerous?

We have no specific security note for port 4598. 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 4598

ServicePortTransportDescriptionReferenceUpdated
a16-an-an 4598 TCP, UDP A16 (AN-AN) - 2005-12

// source: IANA service name and port number registry

03 Check it

Which program uses port 4598, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4598'      # process listening on 4598
sudo lsof -nP -i :4598

macOS

sudo lsof -nP -i :4598

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4598 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4598
netstat -ano | findstr :4598

From another machine

nmap -p 4598 -sV <host>
sudo nmap -sU -p 4598 <host>
nc -zv <host> 4598

Block it in the firewall

sudo ufw deny 4598/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4598" -Direction Inbound -LocalPort 4598 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4598 used for?

Port 4598 is assigned by IANA to a16-an-an (A16 (AN-AN)).

Is port 4598 TCP or UDP?

Port 4598 is registered for TCP and UDP.

Is it safe to open port 4598?

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 4598 is open?

On Linux run "ss -ltnup 'sport = :4598'", on macOS "lsof -nP -i :4598", and on Windows "netstat -ano | findstr :4598" to see the local process. From another machine, "nmap -p 4598 <host>" shows whether it is reachable.

05 Related
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