Did you ever got the error while doing any changes in Azure Application gateway which goes into failed state ? if yes then you are landed in correct blog post. here in this post i will try to share the solution for same issue i faced in past. B ut before that lets try to understand what is Azure AG (application gateway). Below diagram will help you to understand what is Application gateway. In simpler words, Application gateway consists of Load balancer (a device who decide where to send the traffic based on the configuration done on it, although that is completely different topic to discuss) and acts as WAF (Web Application Firewall - which monitors the incoming traffic based on the application behavior hosted on back-end servers) LB where considered as Network device (sometimes it might be software not just physical device and works at Network Layer of OSI model WAF considered as kind of Software and works at Application Layer of OSI model Issue: Application Gateway falling into f
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