HTTPfy

Port 9346 (ctechlicensing)

IANA assigns port 9346 to ctechlicensing: C Tech Licensing.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ctechlicensing TCP C Tech Licensing Reed Copsey Jr -
ctechlicensing UDP C Tech Licensing Reed Copsey Jr -

Check what is listening on port 9346

Linux: is anything listening on TCP 9346?
sudo ss -tlnp 'sport = :9346'
Linux: UDP 9346
sudo ss -ulnp 'sport = :9346'
Linux / macOS: which process owns the port
sudo lsof -nP -i :9346
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':9346 '
Windows (Command Prompt)
netstat -ano | findstr :9346
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 9346 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 9346
From Windows
Test-NetConnection HOST -Port 9346
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 9346

Block port 9346 in the firewall

ufw
sudo ufw deny 9346/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 9346 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 9346 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 9346' -Direction Inbound -Protocol TCP -LocalPort 9346 -Action Block
ufw
sudo ufw deny 9346/udp
iptables
sudo iptables -A INPUT -p udp --dport 9346 -j DROP
nftables
sudo nft add rule inet filter input udp dport 9346 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 9346' -Direction Inbound -Protocol UDP -LocalPort 9346 -Action Block

Related ports

9344mphlpdmc9345rancher9374fjdmimgr9380boxp

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