- Use strong credentials and TLS for signalling.
- Rate-limit registrations to stop extension scanning and toll fraud.
- Alert on unexpected chat protocols leaving servers (possible command and control).
Port 1719: H.323 Unicast Gatekeeper Signaling
Port 1719 is assigned by IANA to h323gatestat (H.323 Unicast Gatekeeper Signaling).
1719
How h323gatestat works
Voice & chatPort 1719 sets up the call (who calls whom), then the voice travels as a stream of audio packets.
- 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
- Voice & chat
Is port 1719 dangerous?
We have no specific security note for port 1719. Its risk depends on the program actually listening on it. General advice for voice & chat services:
IANA registry entries for port 1719
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| h323gatestat | 1719 | TCP, UDP | H.323 Unicast Gatekeeper Signaling | - | 2013-01-31 |
// source: IANA service name and port number registry
Which program uses port 1719, and is it reachable?
Linux
sudo ss -ltnup 'sport = :1719' # process listening on 1719
sudo lsof -nP -i :1719macOS
sudo lsof -nP -i :1719
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1719 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 1719 netstat -ano | findstr :1719
From another machine
nmap -p 1719 -sV <host> sudo nmap -sU -p 1719 <host> nc -zv <host> 1719
Block it in the firewall
sudo ufw deny 1719/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 1719" -Direction Inbound -LocalPort 1719 -Protocol TCP -Action Block # Windows
What is port 1719 used for?
Port 1719 is assigned by IANA to h323gatestat (H.323 Unicast Gatekeeper Signaling).
Is port 1719 TCP or UDP?
Port 1719 is registered for TCP and UDP.
Is it safe to open port 1719?
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. Use strong credentials and TLS for signalling.
How do I check if port 1719 is open?
On Linux run "ss -ltnup 'sport = :1719'", on macOS "lsof -nP -i :1719", and on Windows "netstat -ano | findstr :1719" to see the local process. From another machine, "nmap -p 1719 <host>" shows whether it is reachable.