Luca et al...

Per the reports of problems with graphics and https connections and your
comments about broken browsers, I have conducted some experiments...  It turns
out that there are two problems.

First the results:

Platform  Browser        https: result
Win2K     IE 5.5/128bit  Text appears, broken image icon for graphic
Win2K     NS 4.79        Text appears, broken image icon for graphic
Win2K     NS 6.2.2       Kills ntop

Linux     NS 4.78        Text appears, nothing for the graphics
Linux     Mozilla 0.9.9  Text appears, nothing for the graphics
Linux     Galeon 1.2.0   Text appears, nothing for the graphics
Linux     Konqueror      Text appears, nothing for the graphics
Linux     Opera 6.0B1    Kills ntop

So, it doesn't seem to be an issue of newer vs older browsers or Win vs. Linux,
but rather I can't get ANYTHING to properly return the graphics if it's an
https: connection.  I have also built ntop without zlib with the same results.


The "kills ntop" needs an explaination.

What happens is that ntop never gets control back from the select() call in
handleWebConnections(), so the thread effectively dies and ntop stops "talking".
However, the data collection appears to be going on.  Eventually the browser
times out, but the select() call never returns to ntop.

There has to be some kind of difference between headers, etc. in NS6.2/Opera vs.
all the others, but I can't see the interchange to find out what.  I had hoped
that I had found a tool, but it doesn't work with McAfee installed or NS...

If it were Gecko related, I would expect Mozilla et al to have problems (i.e.
it's not the TLS3.0 problem reported here
http://developer.netscape.com/evangelism/docs/articles/gecko-compatibility/ and
http://developer.netscape.com/evangelism/docs/technotes/tls-ssl3/.  I have -
anyway - tried turning off TLS and SSL3 - same symptoms...

It appears that it loads the 1st page referenced (i.e. it loads index.html - the
main frameset) and then hangs.  If I manually load, say the index_top.html, I
can navigate ONCE...  If I give it a URL that has images, I see the text, but
when it goes to load the logo or the gauge.jpg it hangs...

I think this needs to be confirmed by others and then we need to figure out why
Opera/NS6 are different from all others, and how to fix it...


-----Burton



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