SMS

A2P SMS Firewall Optimization
January 29, 2026

In the world of mobile messaging, there is a dangerous misconception: many Mobile Network Operators (MNOs) believe that simply "having" a firewall means their A2P traffic is secure and monetized. The reality is more costly. If your firewall is poorly oriented or incorrectly integrated, it isn't a shield, it’s a sieve. Traffic that bypasses the firewall is "dark" traffic: it consumes network resources, poses a security risk, and, most importantly, represents a direct hit to your bottom line. Every bypassed message is lost termination revenue - in times where every cent of monetized traffic counts.

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A phone showing two methods of authentication: OTT OTP vs. Silent Authentication
October 28, 2025

Co-authors: Ibrahim Sbeih & José A. García In any digital...

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