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// Other services

Port 41794: Crestron Control Port

Port 41794 is assigned by IANA to crestron-cip (Crestron Control Port).

41794

How crestron-cip works

Other services
client:41794crestron-cipresponse client:41794crestron-cipresponse

The client sends a request to port 41794 and the crestron-cip 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 41794 dangerous?

We have no specific security note for port 41794. 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 41794

ServicePortTransportDescriptionReferenceUpdated
crestron-cip 41794 TCP, UDP Crestron Control Port - 2019-10-17

// source: IANA service name and port number registry

03 Check it

Which program uses port 41794, and is it reachable?

Linux

sudo ss -ltnup 'sport = :41794'      # process listening on 41794
sudo lsof -nP -i :41794

macOS

sudo lsof -nP -i :41794

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 41794 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 41794
netstat -ano | findstr :41794

From another machine

nmap -p 41794 -sV <host>
sudo nmap -sU -p 41794 <host>
nc -zv <host> 41794

Block it in the firewall

sudo ufw deny 41794/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 41794" -Direction Inbound -LocalPort 41794 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 41794 used for?

Port 41794 is assigned by IANA to crestron-cip (Crestron Control Port).

Is port 41794 TCP or UDP?

Port 41794 is registered for TCP and UDP.

Is it safe to open port 41794?

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 41794 is open?

On Linux run "ss -ltnup 'sport = :41794'", on macOS "lsof -nP -i :41794", and on Windows "netstat -ano | findstr :41794" to see the local process. From another machine, "nmap -p 41794 <host>" shows whether it is reachable.

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