Detect and stop VoIP fraud at the signaling layer
Apolo Sentinel combines advanced fraud detection models with tested SIP security firewalls to deliver and monitor VoIP services securely, in real time.

Security and fraud control in one engine
Sentinel gives operators real-time, context-based visibility into unauthorized activity and the ability to mitigate threats across the whole VoIP network.
DoS & botnet attacks
Mitigate denial of service and botnet traffic before it reaches your core.
Traffic pumping
Detect abnormal traffic patterns and premium destinations generating fraud.
CLI spoofing
Identify impersonated or unauthorized ANIs and caller IDs.
Risky destinations
Block destinations marked as prone to fraud and unusual international traffic.
Automatic blocking
Smart locks applied per client in real time, with corrective actions.
Alarms & notifications
Warning and alarm events notified to the operator by SMS and email.
Profiles per client, decisions in milliseconds
Sentinel reads and analyzes 100% of the transactions in memory, comparing them with the traffic profile of each client to apply the right action. All processes run in memory, providing immediate blocking when needed.
It works on a zero-trust architecture: nothing inside or outside the perimeter is trusted by default, and controls are enforced at host or global level to allow or block specific signaling.
- Spoofed ANIs and ANI lists
- Destinations marked as prone to fraud
- Call duration and after-hours traffic
- Unauthorized or impersonated agents

Every action has a consequence
Profile
Automatic traffic profiles are built for each client and interconnection.
Analyze
Every SIP transaction is compared in memory against its profile.
Block
Dangerous traffic is blocked in real time with corrective actions.
Report
Events feed a database that learns and notifies by SMS and email.
Security that does not slow down your network
Sentinel is optimized for memory, so it does not aggressively impact CPU or memory consumption. It analyzes up to 1,000 transactions per second, applies instant block actions and needs no additional resources.
- Up to 1,000 transactions per second
- Instant block actions
- Works alongside SBC Apolocore

Protect your traffic today
Tell us about your network and we will show you Sentinel working on real traffic profiles.
- Fraud risk review of your traffic
- Live demo with real profiles
- Integration with your SBC or softswitch