IIS Services: HTTP.sys, W3SVC, WAS, W3WP, oh my!

When client makes an HTTP request to IIS, there are many layers of drivers and services it travels through. In this blog, I wanted to give a high level overview of the major layers showing how they fit altogether. Here is the high level flow: HTTP.sys is the Kernel-mode HTTP/HTTPS protocol listener. HTTP.sys listens for…

0

Hunting Down a Classic Error: “Page Cannot be Displayed”

Was assisting a customer on a critical server-down situation with a very generic error: “Page cannot be displayed….”. This is a classic error and puts you on an open-ended troubleshooting venue. One of the things you want to do first is to ask yourself few questions: Wasn’t this Server working fine when it restarted last…

0