How to block HTTP packets going to 0.0.0.0 via proxy

[Chris Buechler]

On Fri, Oct 7, 2011 at 5:11 PM, Spenst, Aleksej
<Aleksej.Spenst at harman.com> wrote:
> Hi,
>
> my browser goes online via proxy.
> So, when I type http://0.0.0.0 in my browser I see in wireshark the following:
>
>     Source                   Destination          Protocol                      Info
> 172.16.102.100        172.16.2.17             HTTP           GET http://0.0.0.0/ HTTP/1.1
>
> That is the http GET request with the 0.0.0.0 IP address is sent to my proxy 172.16.2.17.
> I do not want these requests to go to proxy. How can I block such requests with pf rules?
>
> I could easily write a rule to block all packets directly going to IP 0.0.0.0, but in case with proxy, I don't know how to block such requests.
>

Block them on the proxy. PF can't tell the difference between GET
http://0.0.0.0 and GET http://google.com