Use Wireshark to figure out which machines it is phoning home to, and  
then block those explicitly. Yes, you need to go a step deeper than  
just blocking a particular port, but that's trivial with any decent  
firewall setup.

-Pete

On Sep 5, 2008, at 4:18 AM, Gerhard Fiedler wrote:

> Peter Loron wrote:
>
>> Just be careful which ports and packets one allows outbound through
>> your firewall...
>
> No use... you have to give a browser permission to at least run  
> outbound
> connections on TCP port 80 (and to be useful, more than that). With  
> that,
> it has all the permissions it needs to communicate to a server  
> whatever it
> wants to. And get back whatever the server sends...
>
> This is not a firewall issue, this is a trust question.
>
> Gerhard
>
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