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// Other services

Port 3717: WV CSP UDP/IP CIR Channel

Port 3717 is assigned by IANA to wv-csp-udp-cir (WV CSP UDP/IP CIR Channel).

3717

How wv-csp-udp-cir works

Other services
client:3717wv-csp-udp-cirresponse client:3717wv-csp-udp-cirresponse

The client sends a request to port 3717 and the wv-csp-udp-cir 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 3717 dangerous?

We have no specific security note for port 3717. 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 3717

ServicePortTransportDescriptionReferenceUpdated
wv-csp-udp-cir 3717 TCP, UDP WV CSP UDP/IP CIR Channel - 2003-03

// source: IANA service name and port number registry

03 Check it

Which program uses port 3717, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3717'      # process listening on 3717
sudo lsof -nP -i :3717

macOS

sudo lsof -nP -i :3717

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3717 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3717
netstat -ano | findstr :3717

From another machine

nmap -p 3717 -sV <host>
sudo nmap -sU -p 3717 <host>
nc -zv <host> 3717

Block it in the firewall

sudo ufw deny 3717/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3717" -Direction Inbound -LocalPort 3717 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3717 used for?

Port 3717 is assigned by IANA to wv-csp-udp-cir (WV CSP UDP/IP CIR Channel).

Is port 3717 TCP or UDP?

Port 3717 is registered for TCP and UDP.

Is it safe to open port 3717?

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 3717 is open?

On Linux run "ss -ltnup 'sport = :3717'", on macOS "lsof -nP -i :3717", and on Windows "netstat -ano | findstr :3717" to see the local process. From another machine, "nmap -p 3717 <host>" shows whether it is reachable.

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