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Question UDP scan

During the testing phase of selling Linux firewalls I do a large 
amount of scans on the system. In some public available scanners 
there is an option of doing syn scans with UDP packets. But isn't 
the concept of udp conectionless communication? Anyway the 
results out of one of theses tests are always very suspicious and I 
havent seen one firewall (yet) that doesnt show up on one of these 
scans. Anybody care to enlighten me??
Best regards Johan

Johan Hagström           Data Ingenjör / KTH
Direkt: 0498 - 202732    johan.hagstrom@intron.se
Växel:  0498 - 202700    Fax: 0498 - 214640
Intron Service AB

"Security is not a solution. It is a way of life."

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