MDR (Managed Detection and Response)

In telecom networks, MDR is a service that combines telecom-aware detection (signaling IDS, NF behavior analytics, OAM monitoring) with 24/7 analyst triage and guided response. Unlike a generic IT MDR, a telecom MDR understands SS7, Diameter, GTP, and 5G SBA semantics and can recommend protocol-level mitigations such as MAP category blocking or SEPP policy changes.

Categories: Core NetworkSignalingRoaming and Interconnect

MDR in context

The mobile core carries subscriber sessions, mobility and policy. 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.

Signaling protocols carry the control-plane messages that set up calls, register subscribers 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 as top-tier telecom risk.

To place MDR in the wider telecom-security picture, review FS.07, FS.19, GGSN, GTP, GTP Firewall and HLR — each entry cross-references back to this page so you can walk the topic in either direction.

Related terms

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.