name:  Nic Tjirkalli
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Nic Tjirkalli is currently employed as a Customer Consultant/Technical Support 
Person for UUNET Internet Africa, South Africa's leading Internet Service 
Provider, situated somewhere in Johannesburg, South Africa.
One of his current focus areas is Internet security--encompassing  
firewalls and packet filtering on routers. He is a fan of Linux, the art of
Salvador Dali, cartoons and heavy metal, in particular,
a German group called Helloween. His home page, where I got this
information and which you can access from his article, is very interesting.