You are not able to connect to the Avalara production web service, even though the same .NET code worked in development. Receiving "Unable to connect to the remote server."
- The AvaTax web service provides our subscribers with a standard SSL (secure socket layer) access point that makes use of port 443 on the client side for https://development.avalara.net for development, and https://avatax.avalara.net for production
- SOAP or REST requests to these web services are handled by the client-side API and are synchronous - meaning the request and results are all handled in one thread.
- The benefit of this strategy is that the AvaTax web service does not contact the client at any time, as would be expected in an asynchronous architecture
- Therefore all that is required for the client-side proxy server configuration is to set up a proxy pass rule that points to the domain name *.avalara.net
Note: Avalara’s web service does NOT support local host files (where IP's are mapped to Domain Names). Any client accessing the AvaTax web service must use the DNS as a lookup service or risk connection failures.