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Port 1796 (vocaltec-admin)

IANA assigns port 1796 to vocaltec-admin: Vocaltec Server Administration.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
vocaltec-admin TCP Vocaltec Server Administration Scott Petrack -
vocaltec-admin UDP Vocaltec Server Administration Scott Petrack -

Check what is listening on port 1796

Linux: is anything listening on TCP 1796?
sudo ss -tlnp 'sport = :1796'
Linux: UDP 1796
sudo ss -ulnp 'sport = :1796'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1796
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1796 '
Windows (Command Prompt)
netstat -ano | findstr :1796
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1796 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1796
From Windows
Test-NetConnection HOST -Port 1796
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1796

Block port 1796 in the firewall

ufw
sudo ufw deny 1796/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1796 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1796 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1796' -Direction Inbound -Protocol TCP -LocalPort 1796 -Action Block
ufw
sudo ufw deny 1796/udp
iptables
sudo iptables -A INPUT -p udp --dport 1796 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1796 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1796' -Direction Inbound -Protocol UDP -LocalPort 1796 -Action Block

Related ports

1794cera-bcm1795dpi-proxy1797uma1798etp

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