On Friday 30 August 2002 11:50, Stephen Bradley wrote:
> This message was posted to another list and I asked Lance
> and he said I could send it out here as well.

The general algorithm we use is RTT * 1.5 + 60. You measure the RTT to the 
host first through any of a few methods (hping, ping, etc) and then tweak 
your nmap scan to match. If you can't reach the host itself, hit the 
router one hope below it and add 10 for good luck ;) If you just hardcode 
to 50, scans across a slow link will leave you with dropped packets and 
missed ports. There is still no fast method of scanning UDP, since the 
maximum rate is limited by the target host's ICMP responses, which are 
capped according to the RFC.


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