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A Better Way of Looking at Things
We can continue digging down through packets, but Ethereal
offers a powerful and unique feature that makes the analysis a
lot easier! It's called the Follow TCP Stream
feature, and it's one of the many features that makes Ethereal
an awesome tool for troubleshooting authentication problems.
To use the Follow TCP Stream feature, right-click on
the 401 error and select Follow TCP Stream from the menu.
What you end up with is the following:
A closer look here will reveal the power of this
dialog. You can't see it here because of space
limitations, but the information that FrontPage sent is in red
and the information in the response from the server (seen here)
is in blue. What's more, you have clearly readable
information here that shows you exactly why I wasn't allowed to
open the site! In this case, the message is "The user ' '
is not authorized to execute the 'Author Pages' method."
What does that mean? It tells me that the Web server
doesn't know who I am! Wininet has not yet sent any
authentication information. Remember, this is normal for
the first request.
Below is what you see when the authentication
succeeds:
Notice here that the next to the last line
contains authorization information from FrontPage. (It's
the long string of letters.) Notice also that the Web
server returned an HTTP response of "HTTP/1.1 200 OK."
This tells us that we have been granted permission and we're
ready to go.
<Go on to page 5>
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