How to integrate Laravel 8 and Paypal IPN messages

[lo999]

Hello,

I am trying to integrate my laravel 8 app with Paypal IPN messages, but the IPN simulator is failing to make the handshake. I have implemented an IPN listener using the class found here. It seems like the request from the IPN simulator doesn't even make it to my server, so I'm not sure what's going on. I've used tcpdump to check incoming requests and nothing comes through, so it feels like there's something else I'm missing altogether. the route that I provide to paypal's ipn simulatormy IPN listener (internal logic not shown)See description for link to github repo with all the code