Problem: After setting an anonymous proxy connection, an application reports "HTTP/1.1 500 Proxy connection [ ] on Domain [default] not found."
Explanation: This may indicate the requested proxy connection is not defined on the requested domain.
Solution: Make sure the requested domain is the one defined for the proxy connection. If the requested domain name does not match the host name in the URL, the X-SUP-DOMAIN header can be used to specify the requested domain name.