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// Other services

Port 9161: apani2

Port 9161 is assigned by IANA to apani2 (apani2).

9161

How apani2 works

Other services
client:9161apani2response client:9161apani2response

The client sends a request to port 9161 and the apani2 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 9161 dangerous?

We have no specific security note for port 9161. 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 9161

ServicePortTransportDescriptionReferenceUpdated
apani2 9161 TCP, UDP apani2 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 9161, and is it reachable?

Linux

sudo ss -ltnup 'sport = :9161'      # process listening on 9161
sudo lsof -nP -i :9161

macOS

sudo lsof -nP -i :9161

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 9161 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 9161
netstat -ano | findstr :9161

From another machine

nmap -p 9161 -sV <host>
sudo nmap -sU -p 9161 <host>
nc -zv <host> 9161

Block it in the firewall

sudo ufw deny 9161/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 9161" -Direction Inbound -LocalPort 9161 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 9161 used for?

Port 9161 is assigned by IANA to apani2 (apani2).

Is port 9161 TCP or UDP?

Port 9161 is registered for TCP and UDP.

Is it safe to open port 9161?

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 9161 is open?

On Linux run "ss -ltnup 'sport = :9161'", on macOS "lsof -nP -i :9161", and on Windows "netstat -ano | findstr :9161" to see the local process. From another machine, "nmap -p 9161 <host>" shows whether it is reachable.

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