Make your telephone system is secure and prevent toll fraud and hacking of SIP lines and extensions.
Your VOIP telephone system is an essential tool to support the day to day running of your business. If its not fully protected you may be exposed to Toll fraud, theft of information, and loss of revenue, so here are some tips to help protect your business VOIP telephone system from potential attacks.
| Use Strong Passwords
Strong passwords should always be used for every password required in your PBX: extension registrations, user web interface and more. Always change or delete default passwords. |
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| Block Unauthorized Access
Set up firewall rules to block suspicious access and enable the anti-hacking detection on your PBX.
Restrict necessary port traffic to the SIP supplier only, especially port 5060 |
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| Separate Voice and Data Traffic
Consider Secure your traffic or setting up VLAN on the PBX. |
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| Keep Your PBX updated
Update firmware when a new version is released as it may contain security or bug fixes and other potential vulnerabilities. |
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| Secure the Trunks on PBX
Prevent toll fraud by restricting the use of outbound call from each vulnerable end-point. Block anonymous incoming calls. Bar international and premium rate numbers. Block trunk to trunk transfers |
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| Avoid Port Forwarding where possible
Port forwarding risks potential attacks by opening a hole in firewall. To offer remote access for your mobile workers, try securer alternatives like VPN. limit access to your SIP Suppliers IP addresses. |
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Delete Unused Extension Ports and Numbers
Prevent unauthorised use of spare and unused extension ports by removing them from the system programming until they are required.
