I have certain subnets blocked from the internet. Is there a way to show a splash page so that when a user tries to access the internet from the blocked subnet, a message? Something like this (see link), but for Meraki MX. The link below is for MR.
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LITHIUM.InformationBox({"updateFeedbackEvent":"LITHIUM:updateAjaxFeedback","componentSelector":"#informationbox_656c61813d2fdc","feedbackSelector":".InfoMessage"});
LITHIUM.InformationBox({"updateFeedbackEvent":"LITHIUM:updateAjaxFeedback","componentSelector":"#informationbox_656c61813d2fdc_0","feedbackSelector":".InfoMessage"});
LITHIUM.InformationBox({"updateFeedbackEvent":"LITHIUM:updateAjaxFeedback","componentSelector":"#informationbox_656c61813d2fdc_1","feedbackSelector":".InfoMessage"});
LITHIUM.InformationBox({"updateFeedbackEvent":"LITHIUM:updateAjaxFeedback","componentSelector":"#informationbox_656c61813d2fdc_2","feedbackSelector":".InfoMessage"});
LITHIUM.AutoComplete({"options":{"autosuggestionAvailableInstructionText":"Auto-suggestions available. Use Up and Down arrow keys to navigate.","triggerTextLength":4,"autocompleteInstructionsSelector":"#autocompleteInstructionsText_656c6179249296","updateInputOnSelect":true,"loadingText":"Searching...","emptyText":"No Matches","successText":"Results:","defaultText":"Enter a search word","autosuggestionUnavailableInstructionText":"No suggestions available","disabled":false,"footerContent":[{"scripts":"\n\n;(function($){LITHIUM.Link=function(params){var $doc=$(document);function handler(event){var $link=$(this);var token=$link.data('lia-action-token');if($link.data('lia-ajax')!==true&&token!==undefined){if(event.isPropagationStopped()===false&&event.isImmediatePropagationStopped()===false&&event.isDefaultPrevented()===false){event.stop();var $form=$('