Re: How to create (hijacking) secure HTTP sessions?

[Rogan Dawes <discard () dawes za net>]

ascii wrote:
> Robin Wood wrote:
> > What happens if your users are using proxies which change over the
> > period of the session, such as AOL. This approach would stop them from
> > using your system.
>
> i think the answer is in the message you replied : )
>
> > On 6/3/06, ascii <ascii () katamail com> wrote:
> > > this should play better on https then on http because commonly ssl
> > > connections are direct (while some isp split the http traffic over
> > > different proxy servers and several public ips)
>
> does AOL proxy https traffic? normally your browser open an ssl
> connection directly with the server
>
> the other option is to use a proxy with the CONNECT request method
> enabled to tunnel the ssl channel (but the proxy cannot cache the
> traffic, so no cache acceleration)
>
> if this happen and the proxy change then a solution is to exclude the
> ip class from the ip check
>
> naturally you have to see the context, if your webbapp doesn't apply for
> a particular check don't do that particular check
>
> Regards, Francesco 'ascii' Ongaro - http://www.ush.it/


Here's a slightly different question, but along the same lines.

What happens if your users are all behind a particular proxy/firewall? 
e.g. a hosted application provider servicing a large corporate?

Recording the IP would add no value, since they might all be coming from 
the same external address. One might wish to consider the 
"X-Forwarded-For" (or whatever) header in that case, to get the actual 
internal IP address, but of course, it cannot be trusted, since it is a 
header and can be forged like any other.

Rogan

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