Hello World

Chris Angelico rosuav at gmail.com
Sun Jan 18 18:08:56 CET 2015

On Mon, Jan 19, 2015 at 2:48 AM, Michael Ströder <michael at stroeder.com> wrote:
>> For instance, someone could join my wifi
>> network - all they need is the WPA2 PSK, which is well known around
>> the place - and use/abuse our internet connection; but they couldn't
>> access my PostgreSQL databases, because the firewall doesn't permit
>> access to port 5432.
> …but your firewall relies on authenticity of IP addresses. Fail!

No; I have two completely separate networks. If you're on the one that
anyone can easily get onto, it doesn't matter what your IP is, you do
not get access to certain ports on computers on the other side of the


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