Network Detection and Response

NDR in context

The mobile core is where subscriber sessions, mobility and policy live. In 4G it is the EPC (MME, HSS, S/PGW); in 5G it is the Service-Based Architecture with AMF, SMF, UPF, AUSF, UDM and the NRF. Core exposure is the difference between a single-subscriber leak and a fleet-wide breach.

Signaling protocols carry the control-plane instructions that set up calls, register subscribers, hand over sessions and route SMS. SS7, Diameter, GTP-C and SIP are the four dominant families, and interconnect exposure of any of them is treated by GSMA FS.11 / FS.19 / FS.20 as a top-tier telecom risk.

To place NDR in the wider telecom-security picture, review IAMF, Telecom SIEM, ZIP, Vulnerability Assessment, Patch Management and MDR.

Related terms

• IAMF
• Telecom SIEM
• ZIP
• Vulnerability Assessment
• Patch Management
• MDR
• Telecom Forensics
• Lateral Movement (Telecom)

Related topic hubs

• Signaling Firewall Unified SS7/Diameter/GTP/SMS signaling firewall framework.
• SS7 Security SS7/MAP/CAP/SCCP attacks and defenses across 2G/3G interconnect.
• SS7 Firewall GSMA FS.11 category 1/2/3 SS7 message screening at the STP edge.
• SS7 Penetration Testing Interconnect pentest methodology for SS7 signaling.

More from the TelcoSec Glossary

Browse the full TelcoSec Glossary, the Ultimate Guide to Mobile Network Security, or the P1 Arsenal of telecom-security tools.