//free\\ — Gsma Fs.38

: It provides recommendations for protecting not just the SIP signaling itself, but also critical backend infrastructure like: Provisioning Servers : Securing how SIP endpoints are set up. Customer Portals : Preventing unauthorized access to user accounts. Backend Databases

: Security measures for signaling that crosses between different mobile operators. Fraud Mitigation gsma fs.38

The document moves beyond basic signaling security to cover a broader "attack surface," including: Holistic Network Coverage : It provides recommendations for protecting not just

If you provide more context (e.g., topic area, organization, or purpose), I’d be happy to help produce the text you need. Fraud Mitigation The document moves beyond basic signaling

is a comprehensive cybersecurity guideline published by the GSMA Fraud and Security Group (FASG). It provides MNOs, vendors, and security auditors with a standardized framework to assess, design, and validate the security posture of SIP-based architectures.

[ Non-SIM User Agent ] ---> ( Public Internet / VPN ) ---\ +==> [ Session Border Controller ] ===> [ Secure SIP Core ] [ SIM-Enabled VoLTE ] ----> ( Radio Access Network ) ----/ (Border Defense) (Internal Segment) 1. Non-SIM and Hosted Enterprise Access

Recommends the deployment of Access Session Border Controllers (A-SBC) as a front-line defense against malicious traffic.