Extension Security

Secure the VoIP extensions.

Extension Password

The PBX will generate a random password for a new extension. If you want to set the password manually, the password should meet the following requirements:
  • At least 10 characters
  • At least 1 uppercase letter
  • At least 1 lowercase letter
  • At least 1 digit
  • Allowed special characters include only ~, ^, *, -, _, and ?
  • Consecutive numbers are not allowed (e.g., 4567)
  • The extension number and the caller ID are not allowed

Restrict Extension Registration

You can limit which IP address or which User Agent is allowed to register a certain extension.

Go to Settings > PBX > Extensions to edit the extension's Advanced setting.

  • User Agent Registration Authorization

    By default, the PBX allows phones to register extensions without user agent limit. To enhance the extension security, you can restrict which user agent is allowed to register the extension.

    When a phone is trying to register the extension, the phone will send SIP packets that contain the user agent. If the user agent is not allowed, the registration will fail.

  • IP Restriction

    To enhance the extension security, you can restrict which IP is allowed to register the extension.

SRTP

SRTP is used to encrypt audio streams. If SRTP is enabled for an extension, the extension will support SRTP and will allow negotiation with calls without SRTP.

Go to Settings > PBX > Extensions to edit the extension's Advanced setting.