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// Other services

Port 1613: NetBill Key Repository

Port 1613 is assigned by IANA to netbill-keyrep (NetBill Key Repository).

1613

How netbill-keyrep works

Other services
client:1613netbill-keyrepresponse client:1613netbill-keyrepresponse

The client sends a request to port 1613 and the netbill-keyrep 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 1613 dangerous?

We have no specific security note for port 1613. 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 1613

ServicePortTransportDescriptionReferenceUpdated
netbill-keyrep 1613 TCP, UDP NetBill Key Repository - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1613, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1613'      # process listening on 1613
sudo lsof -nP -i :1613

macOS

sudo lsof -nP -i :1613

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1613 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1613
netstat -ano | findstr :1613

From another machine

nmap -p 1613 -sV <host>
sudo nmap -sU -p 1613 <host>
nc -zv <host> 1613

Block it in the firewall

sudo ufw deny 1613/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1613" -Direction Inbound -LocalPort 1613 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1613 used for?

Port 1613 is assigned by IANA to netbill-keyrep (NetBill Key Repository).

Is port 1613 TCP or UDP?

Port 1613 is registered for TCP and UDP.

Is it safe to open port 1613?

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 1613 is open?

On Linux run "ss -ltnup 'sport = :1613'", on macOS "lsof -nP -i :1613", and on Windows "netstat -ano | findstr :1613" to see the local process. From another machine, "nmap -p 1613 <host>" shows whether it is reachable.

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