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Port 1719 (h323gatestat)

IANA assigns port 1719 to h323gatestat: H.323 Unicast Gatekeeper Signaling.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
h323gatestat TCP H.323 Unicast Gatekeeper Signaling ITU-T -
h323gatestat UDP H.323 Unicast Gatekeeper Signaling ITU-T -

Registry dates for this port: last modified 2013-01-31.

Check what is listening on port 1719

Linux: is anything listening on TCP 1719?
sudo ss -tlnp 'sport = :1719'
Linux: UDP 1719
sudo ss -ulnp 'sport = :1719'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1719
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1719 '
Windows (Command Prompt)
netstat -ano | findstr :1719
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1719 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1719
From Windows
Test-NetConnection HOST -Port 1719
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1719

Block port 1719 in the firewall

ufw
sudo ufw deny 1719/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1719 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1719 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1719' -Direction Inbound -Protocol TCP -LocalPort 1719 -Action Block
ufw
sudo ufw deny 1719/udp
iptables
sudo iptables -A INPUT -p udp --dport 1719 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1719 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1719' -Direction Inbound -Protocol UDP -LocalPort 1719 -Action Block

Related ports

1717fj-hdnet1718h323gatedisc1720h323hostcall1721caicci

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