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// Other services

Port 8211: Aruba Networks AP management

Port 8211 is assigned by IANA to aruba-papi (Aruba Networks AP management).

8211

How aruba-papi works

Other services
client:8211aruba-papiresponse client:8211aruba-papiresponse

The client sends a request to port 8211 and the aruba-papi service answers.

Transport
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 8211 dangerous?

We have no specific security note for port 8211. 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 8211

ServicePortTransportDescriptionReferenceUpdated
aruba-papi 8211 UDP Aruba Networks AP management - 2018-10-04
-8211-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 8211, and is it reachable?

Linux

sudo ss -ltnup 'sport = :8211'      # process listening on 8211
sudo lsof -nP -i :8211

macOS

sudo lsof -nP -i :8211

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 8211 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 8211
netstat -ano | findstr :8211

From another machine

nmap -p 8211 -sV <host>
sudo nmap -sU -p 8211 <host>
nc -zv <host> 8211

Block it in the firewall

sudo ufw deny 8211/udp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 8211" -Direction Inbound -LocalPort 8211 -Protocol UDP -Action Block  # Windows
04 FAQ
What is port 8211 used for?

Port 8211 is assigned by IANA to aruba-papi (Aruba Networks AP management).

Is port 8211 TCP or UDP?

Port 8211 is registered for UDP.

Is it safe to open port 8211?

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 8211 is open?

On Linux run "ss -ltnup 'sport = :8211'", on macOS "lsof -nP -i :8211", and on Windows "netstat -ano | findstr :8211" to see the local process. From another machine, "nmap -p 8211 <host>" shows whether it is reachable.

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