We are currently running apache 2.2.6 and all is running well. Except we can no longer access our Citrix gateway internally. We type in https://gateway.citrix.com.au and get this error:-
The proxy server received an invalid response from an upstream server.
The proxy server could not handle the request CONNECT gateway.citrix.com.au:443.
Reason: DNS lookup failure for: gateway.citrix.com.au
This has only started happening since we stopped outsourcing our proxy service to MessageLabs and built the internal Apache proxy with SurfControl.
The above address works fine externally - its just internally that is the problem.
Does anyone have any ideas on how to sort this out please??
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