My company uses DNS, Firewall, Proxy, and Websense to secure our network and the inbound & outbound transactions. I have a basic understanding of how each plays into the overall scheme. As the support owner of multiple applications within my company, I am getting a large number of incidents inwich an application is not able to function as it requires access to the internet and is being blocked along the route or cases where a webservice returns "Internet Explorer cannot display the webpage". What I am having difficulty with is identifying or developing a basic troubleshooting guide that will help me identify which piece of the puzzle is the culprit so that I can route a request for resolution to the appropriate team. I have searched and asked questions but with no real results and short of taking classes (which I intend to do) which will not resolve the immediate issue, I am hoping one of you can help me sort it all out.
Thank you in advance for your time