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Toll Fraud Prevention: Protecting Your VoIP System From Abuse
Toll fraud occurs when attackers gain access to a phone system and route expensive international or premium-rate calls at the owner's expense. Attacks often happen outside business hours and can generate substantial charges before anyone notices.
How Attackers Get In
Weak or default SIP passwords, exposed management interfaces, and unpatched vulnerabilities are common entry points. Automated scanners probe the internet constantly for these weaknesses.
Prevention Checklist
Change default credentials immediately. Use strong, unique SIP passwords. Restrict international dialing to users who need it. Set after-hours call restrictions. Enable TLS and SRTP encryption. Deploy an SBC at the network edge. Review call detail records regularly.
Detecting Fraud Early
Set alerts for unusual call patterns, such as sudden spikes in international calls or calls outside business hours. Many fraud incidents are visible in logs before the bill arrives.
Response Plan
If fraud is suspected, block suspicious destinations, disable compromised extensions, change credentials, and contact the SIP trunk provider. Quick response limits financial damage.
Redstone platforms provide the access controls, encryption, and SBC integration needed to implement these protections.
Redstone Systems, Inc. founded in Delaware, USA in December 2002, has been the ODM vendor for many well-known communications companies, serving the Southeast Asian market. In 2020, Redstone Systems will begin to return to the North America market with its self-developed brand.
Redstone has a complete product line of intelligent voice gateways, providing IP-PBXs, analog VoIP gateways (FXS/FXO), digital VoIP gateways (E1/T1), border appliances, and session boundary controllers (SBCs).
With advanced technology in digital signal processor (DSP), speech coding and speech processing, as well as efficient operational tools such as cloud remote management, auto provisioning, Redstone gateways are widely used in markets of enterprise communications, cloud communications, call centers, operators’ IMS/SIP trunks, bringing users friendly, efficient and reliable communication experience.
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