UDP Port 2123 – gtp-control

About UDP Port 2123

Port 2123 carries the IANA assignment for gtp-control. The IANA description reads: ‘GTP-Control Plane (3GPP)’. This port is referenced in 2 IDS rules and exhibits low malware activity in monitored traffic.

IDS Rule References

2 IDS / security rules reference UDP port 2123. Presence in IDS rules does not mean traffic on this port is malicious. These are patterns security tools monitor.

Rule categories (top 1): trojan-activity (2).

Sample rule descriptions for UDP port 2123:

• ET EXPLOIT GTPDoor Trigger Packet Request
• ET EXPLOIT GTPDoor Trigger Packet Response

Malware Activity

Some malware indicators are observed on this port.

2 of 2 IDS rules for UDP port 2123 involve malware activity.

Families observed (top 1): GTPDoor (2).

Data Sources

This information is compiled from: IANA Service Name and Transport Protocol Port Number Registry and Emerging Threats Open Ruleset (BSD 2-Clause / GPLv2 per SID range).