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SMS Firewall

SMS Firewall: How Carriers Protect Their Networks from Gray Routes

IDM EditorialFebruary 28, 20269 min read

Gray routes cost carriers worldwide an estimated USD 3-5 billion per year in lost A2P revenue. Modern SMS firewall solutions are the answer.

What are Gray Routes?

Gray routes are paths through which A2P messages are smuggled into the network disguised as P2P traffic — bypassing official A2P termination fees.

How an SMS Firewall Works

IDM's AI-powered SMS firewall analyzes every SMS data stream in real time. Machine learning models detect patterns that indicate gray routes, SIM-box fraud, or spam.

AIT (Artificially Inflated Traffic) Detection

A growing problem: automatically generated fake traffic that abuses OTP verifications. IDM's firewall detects AIT patterns based on behavioral analysis.

Results

Carriers using IDM's SMS firewall typically report a 15-30% increase in A2P revenue along with better network protection.

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