IPS (Intrusion Prevention System)

An Intrusion Prevention System inspects traffic in line and actively blocks detected attacks, going beyond an IDS that only alerts. Modern IPS engines combine signature, protocol-anomaly, and behavioural detection, and are often integrated into next-generation firewalls. In telecom they are deployed at IT/OAM boundaries; SS7/Diameter signalling firewalls play the equivalent role for telecom protocols.

Categories: SignalingSecurity ControlsThreats and Attacks

IPS 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.

Security controls in telecom span signaling firewalls (SS7/Diameter/GTP screening at the network edge), transport encryption (IPsec, TLS, PRINS), identity and access on OSS/BSS, and monitoring at both the packet and log level. Controls are audited against GSMA FS.11/FS.19/FS.20/FS.36 and, in Europe, NIS2 sectoral rules.

To place IPS in the wider telecom-security picture, review PCAP, IDS, Indicators of Compromise (Telecom IoCs), Insider Threat, Signaling IDS and Detection Engineering.

Related terms

Related topic hubs

  • Signaling Firewall Unified SS7/Diameter/GTP/SMS signaling firewall framework.
  • SS7 Firewall GSMA FS.11 category 1/2/3 SS7 message screening at the STP edge.
  • 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.

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