Souverix Rempart¶

SIG-GW / IBCF - Fortified Border Control

Overview¶

Souverix Rempart is the carrier and military-grade Session Border Controller (SBC) and Interconnection Border Control Function (IBCF). It serves as the fortified boundary layer of the Souverix platform.

Rempart = fortified wall (French)

Role¶

Rempart represents the fortified sovereign wall that protects the IMS core from external threats while enabling secure interconnect with other networks.

Functions¶

Border Control¶

NNI (Network-to-Network Interface) border control
IBCF behavior per 3GPP TS 23.228
SIP normalization
Topology hiding
Security enforcement

STIR/SHAKEN¶

STIR/SHAKEN signing (outbound)
STIR/SHAKEN verification (inbound)
Certificate management integration
Attestation level enforcement

Security¶

DoS protection
Rate limiting
SIP fuzzing protection
TLS/mTLS enforcement
Header size limits
Method allowlisting

Peering Policy¶

Peer allowlisting
Routing policy enforcement
Codec policy
SRTP enforcement
Emergency routing priority

Standards Compliance¶

3GPP TS 23.228 - IMS Architecture (IBCF)
RFC 3261 - SIP: Session Initiation Protocol
RFC 8224 - SIP Identity Header (STIR)
RFC 8225 - PASSporT Token

Integration¶

Rempart integrates with: - Souverix Coeur - IMS core signaling - Souverix Autorite - Certificate management - Souverix Vigie - AI intelligence - Souverix Mandat - Lawful intercept - Souverix Priorite - Emergency services