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Pix firewall...upper end one..not the 506...configure the IOS correctly and install Cisco HIP software on your server....I haven't seen too many hackers defeat this system...about the third ping and HIP blocks the IP.
Check it out on Cisco's site....I have probably fifty similiar installations and not had a successful hack. Cisco claims it can't be hacked...of course, they also claim they hung the moon, too.
In all seriousness, it is a difficiult system to defeat. Have seen many try and move on to easier prey....something that says NT on it usually. I use it at home and then stick zone alarm on just for internal stuff, pretty tough combination.
Forget all the proxy server bullshit out there, they are easy prey for a real hacker...the kiddies get stumped on them cause they can't find a port open but the good ones breeze right through em.
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The object of war is not to die for your country but to make the other bastard die for his. -George Patton
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