Company X did not set limits on outgoing calls , and hackers were able to make thousands of international calls at their expense. As a result, losses amounted to more than $10,000 .
To avoid attacks, it is necessary to panama email list 440115 contact leads use a comprehensive approach to VoIP security.
Basic security methods:
Call encryption (TLS, SRTP) Allows you to protect conversations from interception and data substitution.
VPN for VoIP Using VPN helps hide VoIP traffic and prevent attacks on the system.
Restricting access by IP addresses Access to the IP PBX should be allowed only from trusted IP addresses (e.g. office computers).
Complex passwords and two-factor authentication
Passwords to SIP accounts must be complex and unique . Additional protection – two-factor authentication.
Restricting International Calls If a company does not need international calls, it is better to block them so that attackers cannot use email server infrastructure the system for fraud.
Automatic detection of suspicious activity Set up a monitoring system that records abnormal calls (for example, a sharp increase in the number of outgoing calls).
DDoS attacks and network overload protection
A DDoS attack is a massive attack on a VoIP system in which attackers generate thousands of false calls, overloading the server.
How to protect yourself from DDoS attacks?
Use of anti-DDoS services – specialized systems that block malicious traffic. Setting up automatic filters – the system should block calling list suspicious IP addresses. Network separation – telephony should operate through a separate VLAN network. Use of a reliable VoIP provider that has protection against attacks.
Example: Company Z faced a DDoS attack, due to which the telephony stopped working for 2 hours . After connecting anti-DDoS protection, such problems no longer occurred.
4. Caller ID Spoofing How to protect
Fraudsters can substitute phone numbers to impersonate company representatives and deceive customers.