![]() I don't know what mechanism nmap uses to determine that a host is live (presumably ARP) but I would suggest looking at whatever nmap options there are for adjusting the number of probes/queries and probe/query timeout. professionals to enumerate open ports and find live hosts in a network (and. Nmap performance may still not be a good fit for you, but there are tools designed for that particular task, though they require some effort to set them up. 259 2 3 8 5 Seriously, sometimes things take time. Then when you are playing with Nmap you can scan your local virtual. That said, for a reference, a /8 IP network has 16777216 addresses. Note that the answer I've linked to above also mentions -max-parallelism, which is an option not to speed up but to decrease the speed. Ping scans are used for detecting live hosts in networks. Values above are taken from my personal experience. returns that all hosts are 'up', running nmap with -unprivilege flag (but i'm logged as root) returns not all list of hosts, and -unprivilege flag limits nmap functions.
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