[suse-security] Portscans

Hi list, I have a few questions about the detection of port scanning. In the IX 5/May 2000 magazin (German), the author writes that he uses nmap to scan a well used web site. First I want to know if the victim can easily detect the scan and how to prevent such scans. Does SuSE 6.x contain any tools to do that ? PS: I ask me, if it is legal to do portscans on any sites ? -- Two-a-Day at joesixpack.net www.freenet.de/joesixpack keyid BF3DF9B4