Well… that was fun.
I’m an IT Systems Engineer by trade. This kinda shit is my wheelhouse, but i didn’t expect the transition to go wrong.
My current ISP was bought by an energy company. in this country, electricity providers like to suck up promising / well established smaller ISP’s who perform well and are a quality service.
My IP address was transitioned to the new services backbone WITHOUT being set as a static IP address, as I requested. This resulting in my WAN being routed from a WAN-DHCP network, which is behind CGNAT – so no port 443 > WAN traffic could flow. Quick email to the support team last night, followed up this morning – assigned a new static ip address, routed from a different pool WITHOUT CGNAT, meaning traffic will again flow as expected.
It took a packet capture and a cURL test to figure this out last night. Trying to put the pieces back together currently, now that that’s fixed.
Stay tuned! 🙂