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Port 41797 (crestron-ctps)

IANA assigns port 41797 to crestron-ctps: Crestron Secure Terminal Port.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
crestron-ctps TCP Crestron Secure Terminal Port Crestron Electronics -

Registry dates for this port: registered 2012-06-27, last modified 2019-10-17.

Check what is listening on port 41797

Linux: is anything listening on TCP 41797?
sudo ss -tlnp 'sport = :41797'
Linux / macOS: which process owns the port
sudo lsof -nP -i :41797
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':41797 '
Windows (Command Prompt)
netstat -ano | findstr :41797
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 41797 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 41797
From Windows
Test-NetConnection HOST -Port 41797

Block port 41797 in the firewall

ufw
sudo ufw deny 41797/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 41797 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 41797 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 41797' -Direction Inbound -Protocol TCP -LocalPort 41797 -Action Block

Related ports

41795crestron-ctp41796crestron-cips42508candp42509candrp

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.