App Gateway in ASC stopped reporting

Good day,

 

A UDR of 0.0.0.0/0 to a NVA is causing the App gateway in ASC to stop reporting. I know if I only have a range and not 0.0.0..0/0 for the addressing it will report as healthy. If I want to keep the 0.0.0.0/0 what address ranges do I need to use for the ASC. I cant find a list of addresses.

 

Any help or tips appreciated

 

Thanks

 

Joel