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// Other services

Port 3517: IEEE 802.11 WLANs WG IAPP

Port 3517 is assigned by IANA to 802-11-iapp (IEEE 802.11 WLANs WG IAPP).

3517

How 802-11-iapp works

Other services
client:3517802-11-iappresponse client:3517802-11-iappresponse

The client sends a request to port 3517 and the 802-11-iapp 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 3517 dangerous?

We have no specific security note for port 3517. 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 3517

ServicePortTransportDescriptionReferenceUpdated
802-11-iapp 3517 TCP, UDP IEEE 802.11 WLANs WG IAPP - 2002-05

// source: IANA service name and port number registry

03 Check it

Which program uses port 3517, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3517'      # process listening on 3517
sudo lsof -nP -i :3517

macOS

sudo lsof -nP -i :3517

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3517 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3517
netstat -ano | findstr :3517

From another machine

nmap -p 3517 -sV <host>
sudo nmap -sU -p 3517 <host>
nc -zv <host> 3517

Block it in the firewall

sudo ufw deny 3517/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3517" -Direction Inbound -LocalPort 3517 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3517 used for?

Port 3517 is assigned by IANA to 802-11-iapp (IEEE 802.11 WLANs WG IAPP).

Is port 3517 TCP or UDP?

Port 3517 is registered for TCP and UDP.

Is it safe to open port 3517?

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 3517 is open?

On Linux run "ss -ltnup 'sport = :3517'", on macOS "lsof -nP -i :3517", and on Windows "netstat -ano | findstr :3517" to see the local process. From another machine, "nmap -p 3517 <host>" shows whether it is reachable.

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