[CentOS] firewall?

On Sat, 16 Jul 2011, Ljubomir Ljubojevic wrote:

*snip*

> I wrote about "physical presence *outside* of your network", like if you
> are on a large WISP that uses bridged network (bad design) and your
> Wireless client is bridged, and you have single NIC firewall in place,
> entire WISP's network will be able to sniff your traffic and hack into
> unprotected workstations/desktops. And there are those scenarios, much
> more then you can think.

Which is why one poster mentioned that you need to be 
familiar with IPtables and Networking before trying to make 
your machine(s) network(s) secure?

I read some time ago something about tunneling different 
protocols through firewalls? which sounded quite scary.

Keith

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