How Do I Resolve Error Message: "407 Proxy?"

Overview 

You are receiving a 407 error when you try to connect to our service.

Environment

Avalara AvaTax

Resolution 

• Contact your IT department and provide the full 407 error message, to help them determine the specific area which needs to be addressed.
  • https://avatax.avalara.net (https://development.avalara.net if connecting to a test account)
  • Service uses secure Port 443

Note: AvaTax does not use a proxy; all proxy errors are a result of your local network configuration.  The general solution is to ensure port 443 is open. Verify that the AvaTax domain is not blocked on your network and is resolving through public DNS servers.