CyberHunter
Local dataset, no network
// Other services

Port 4113: AIPN LS Registration

Port 4113 is assigned by IANA to aipn-reg (AIPN LS Registration).

4113

How aipn-reg works

Other services
client:4113aipn-regresponse client:4113aipn-regresponse

The client sends a request to port 4113 and the aipn-reg 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 4113 dangerous?

We have no specific security note for port 4113. 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 4113

ServicePortTransportDescriptionReferenceUpdated
aipn-reg 4113 TCP, UDP AIPN LS Registration - 2006-10

// source: IANA service name and port number registry

03 Check it

Which program uses port 4113, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4113'      # process listening on 4113
sudo lsof -nP -i :4113

macOS

sudo lsof -nP -i :4113

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4113 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4113
netstat -ano | findstr :4113

From another machine

nmap -p 4113 -sV <host>
sudo nmap -sU -p 4113 <host>
nc -zv <host> 4113

Block it in the firewall

sudo ufw deny 4113/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4113" -Direction Inbound -LocalPort 4113 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4113 used for?

Port 4113 is assigned by IANA to aipn-reg (AIPN LS Registration).

Is port 4113 TCP or UDP?

Port 4113 is registered for TCP and UDP.

Is it safe to open port 4113?

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 4113 is open?

On Linux run "ss -ltnup 'sport = :4113'", on macOS "lsof -nP -i :4113", and on Windows "netstat -ano | findstr :4113" to see the local process. From another machine, "nmap -p 4113 <host>" shows whether it is reachable.

05 Related
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