Automated functions on WAN IP change

  • Hi, I'm looking to implement this ridiculously complicated setup:

    In order to accomplish this, I need my "main" pfSense router to initiate an action whenever the WAN IP changes. In other words, when the DHCP lease with my ISP expires and they issue a new IP, I need to be able to trigger something to happen. I'm not asking for help coding it, just for guidance where to best implement the extension point so it will survive updates.

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