2123
GTP Control
Medium RiskUDP — System & Infrastructure
Port Overview
Port Number
2123
Service Name
GTP Control
Transport Protocol
UDP
Category
System & Infrastructure
Security Risk
Medium
Port Range
Registered (1024-49151)
What is Port 2123?
Port 2123 is used by GPRS Tunneling Protocol Control (GTP-C) for mobile network signaling. Mobile networks use GTP-C to manage the setup, modification, and teardown of data sessions for mobile subscribers. It is a core protocol in 3G, 4G LTE, and 5G mobile core networks.
UDP
System & Infrastructure
Security Considerations
Port 2123 (GTP Control) 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.