Hardening

In telecommunications, Hardening is the process of reducing the attack surface of a network function, host, or signaling node by disabling unused services, enforcing least-privilege accounts, applying secure baselines, and configuring protocol-level controls (for example MAP category filtering, GTP-C rate limits, or SBA OAuth2 scope restrictions). Hardening guidelines are published by 3GPP, GSMA SCAS, and vendors.

Categories: Core NetworkSignalingSecurity Controls

Hardening 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 Hardening in the wider telecom-security picture, review 5G SBA, ACL, Core Network Security Assessment, IETF, Network Exposure Function (NEF) and RSA — each entry cross-references back to this page so you can walk the topic in either direction.

Related terms

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