Extension Security

Secure the VoIP extensions.

SIP Registration Port

To prevent malicious registration of SIP extensions, go to Settings > PBX > General > SIP > General to change the UDP Port.

Note: After you change the SIP UDP registration port, you need to change the relevant auto defense rules for the SIP port.

Extension Password

The PBX will generate an random password for a new extension. If you want to set the password manually, the password should meet the following requirements:

  • At least 8 characters
  • At least 1 number
  • At least 1 uppercase letter
  • At least 1 lowercase letter
  • Avoid word or name

    For example, avoid word like yeastar, password, carol etc. Use random password like 8lsS*!08k_s922.

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.