[Gllug] Proxy awareness campaign

[Kieran Barry]

On Wed, 17 Oct 2001, Paul Brazier wrote:

> > definatlely a no,
> >   no as was connecting the ADSL link to anything other than a single 
> > machine which may not be connected to a network.  If you wanted your 
> > machine to connect to say the children's pc in their bedroom, 
> 
> How would they know if you were doing this anyway? Surely masquerading
> makes this invisible from outside?
> 
One obvious way would be the User-agent line in the http headers. These
often say the platform in use.

If someone uses Mozilla on Linux, it looks a whole lot different from
using IE on NT.

User-Agent: Mozilla/3.01 (X11; I; Linux 2.2.19 i586)
vs
User-Agent: Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)

And if you strip the User-Agent lines out, that would then be a flag to
look further.

I reckon that email headers would be similar, and there are probably
other tip offs.

Regards

Kieran


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