1720
H.323
Medium RiskTCP — Streaming & Media
Port Overview
Port Number
1720
Service Name
H.323
Transport Protocol
TCP
Category
Streaming & Media
Security Risk
Medium
Port Range
Registered (1024-49151)
What is Port 1720?
Port 1720 is used by the H.323 VoIP and video conferencing protocol for call signaling and setup. H.323 was a dominant standard for IP-based voice and video calls before SIP became prevalent. It is still used in enterprise telephony systems, video conferencing endpoints, and some PBX systems.
TCP
Streaming & Media
Commonly Used
Security Considerations
Port 1720 (H.323) is classified as medium risk. While this service is commonly exposed, consider using encrypted alternatives where available.
Recommendation: Keep the service updated. Monitor logs for unusual activity.