Is port 2123 (GTP Control) dangerous?

Port 2123 is classified as medium risk. It is commonly exposed but consider using encrypted alternatives where available and monitor activity.

Should port 2123 be open on my firewall?

Port 2123 can be open but should be monitored closely. Keep the service updated and prefer encrypted alternatives where available.

What transport protocol does port 2123 use?

Port 2123 (GTP Control) uses the UDP transport protocol and falls under the System & Infrastructure category.

:2123 (UDP)

GTP Control

Medium Risk

UDP — 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.

Related Ports — System & Infrastructure

0 Reserved 1 TCPMUX 2 Management Utility 3 CompressNET 4 Unassigned 5 RJE 6 Unassigned 7 Echo

Related Terms

Bandwidth Latency Packet Loss Ping Throughput ASN