Snort mailing list archives

Re: HTTP Protocol Analysis


From: Jason <security () brvenik com>
Date: Fri, 14 May 2004 10:19:04 -0400

What kind of proxy do you have?

Sonika Malhotra wrote:

Hello List,

I faced a recurrent problem in my network that any request to www.google.com , www.rediff.com .. etc was getting redirected to www.coolsavings.com.

So the http traffic dump was taken using Snort. ( logger mode of Snort)

The following was found in the HTTP session dump and it can be observed that the reply packet had extra appended tags as follows

... rediff Page contents....
<HTML>
<META HTTP-EQUIV=Refresh Content="0; URL=http://www.coolsavings.com";>
</HTML>

Now this page is cached at our proxy and so all the requests are redirected to new url.

when we disable the caching at proxy the problem is taken care of, but the mechanism of doing this is still not known.

I shall be grateful it anybody can explain this process.

Regards
Sonika





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