Diameter Interconnect Security

Diameter Interconnect Security in context

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.

Roaming and interconnect are where two operators, often with an IPX or GRX carrier in between, exchange signaling and user-plane traffic. Trust boundaries here are the primary attack surface for location tracking, SMS interception and fraud, which is why GSMA now mandates SEPP with PRINS on 5G interconnect.

To place Diameter Interconnect Security in the wider telecom-security picture, review Mitigation, N32 Interface (5G), SS7 Interconnect Security, IR.21, SEPP Security and N32 Tampering.

Related terms

• Mitigation
• N32 Interface (5G)
• SS7 Interconnect Security
• IR.21
• SEPP Security
• N32 Tampering
• FS.36
• DEA

Related topic hubs

• Diameter Security 4G/LTE Diameter threats across IPX/roaming and DEA defenses.
• Diameter Firewall GSMA FS.19 screening at the Diameter Edge Agent on S6a/S9/S13.
• Diameter Attacks S6a IDR/PUR/CLR abuse, subscriber tracking, LTE signaling attacks.
• Signaling Firewall Unified SS7/Diameter/GTP/SMS signaling firewall framework.

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