Fantastic tips to guard against telephone fraud!
Calteq is a member of the FCS, a trade association which promotes best practice in communication services. We have created a checklist in collaboration with the FCS to help you secure your phone system against fraudulent use. It is not a guarantee of security but we strongly advise you to carry out the steps below to help protect your company from telephone fraud. For further information about cyber security, visit https://www.cyberstreetwise.com/
A senior manager should be aware of these safeguards and ensure staff follow them as relevant:
- Remove all default password settings when deploying the PBX and limit access to any maintenance ports.
- Passwords and access codes should be changed regularly and if possible be alpha/ numeric and as many digits as the system allows. Avoid 000, 1234, extension number=PIN passwords.
- Delete/change passwords for ex employees.
- Consider limiting call types by extension, if an extension user has no requirement to ring international/premium rate numbers then bar access to these call types.
- DISA – (Direct Inwards System Access) is typically used to allow employees to dial in from home and make outbound calls (usually high value call types, ie mobile, international etc) via the company PABX. Your CP has deactivated this; if reactivated it should be closely controlled.
- Secure the system physically, site it in a secure comms room and restrict access to that area.
- Regular reviews of calls should be carried out to cover analysis of billed calls by originating extension also to identify irregular usage and unexpected traffic.
- Ensure you fully understand your system’s functionality and capabilities and restrict access to those services which you do not use.
- Mailboxes – block access to unallocated mailboxes on the system, change the default PIN on unused mail boxes.
- Be vigilant for evidence of hacking – inability to get an outbound line is usually a good indicator of high volumes of traffic through your system. Check for calls outside business hours.
- Assess security of all PBX peripherals/applications: platform, operating system, password and permissions scheme. Carefully evaluate the security of any onboard remote management utility (eg PC Anywhere) for possible holes.
- Check firewall logs weekly.
- If relevant set access PIN on smartphones that will use VOIP.
- Limit VOIP registrations to office network.
- For SIP systems, set credit limits per phone per day.
To download our checklist please click here