Re: [Feature request] Map hostnames to IP addresses

Thank you. I didn't know one could rewrite IP in the client header. I'll
try this. Thanks. :)


On Thu, Mar 7, 2013 at 9:01 PM, Fabian Keil <[email protected]> wrote:

> Betty <[email protected]> wrote:
>
> > Some domains (for example, many Google services) are blocked in China and
> > they won't resolve to the correct IP addresses. If we specify the correct
> > IPs to those domains in the "hosts" file
> > (C:\Windows\System32\drivers\etc\hosts), we can visit those sites.
> > The problem with the hosts file is that it does not support wildcards. We
> > have to write many lines in the hosts file like this:
> > 203.208.46.200 0.docs.google.com
> > 203.208.46.200 1.docs.google.com
> > 203.208.46.200 2.docs.google.com
> > 203.208.46.200 3.docs.google.com
> > 203.208.46.200 4.docs.google.com
> > 203.208.46.200 5.docs.google.com
> > 203.208.46.200 6.docs.google.com
> > 203.208.46.200 7.docs.google.com
> > 203.208.46.200 8.docs.google.com
> > 203.208.46.200 9.docs.google.com
> > This is only a small fraction. The actual file has hundreds of lines.
> > Google uses a lot of domains!
> >
> > My feature request is to let Privoxy have the ability to map certain
> > hostnames to certain IP addresses, while supporting wildcards. Hopefully
> we
> > won't need the hosts file and we can write in Privoxy's action file
> > something like:
> >
> > 203.208.46.200 *.docs.google.com
> >
> > (Please note that 203.208.46.200 is not a proxy. It is an IP used by
> > Google. Using "forward" in Privoxy does not work.)
> >
> > Is that possible? Thank you.
>
> Yes that's already possible using the client-header-filter directive:
>
> http://config.privoxy.org/user-manual/actions-file.html#CLIENT-HEADER-FILTER
>
> If you add a filter like the following to one of your filter files:
>
> CLIENT-HEADER-FILTER: rewrite-to-203.208.46.200 Rewrite the request
> destination to 203.208.46.200 and keep the Host header unmodified. May or
> may not fool the GFW of China.
> s@^(\w+) (http://)?([^/ ]+?)([/ ])@$1 $2\203.208.46.200$4@
>
> You can enable it in one of your action files with something like:
>
> {+client-header-filter{rewrite-to-203.208.46.200}}
> .docs.google.com/
>
> Note that Privoxy can also be used with Tor, though:
> http://www.privoxy.org/faq/misc.html#TOR
>
> Tor provides censorship resistance out of the box:
> https://www.torproject.org/
>
> Fabian
>

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