The ntp protocol uses only udp, and the ntpd service only sets up udp sockets, not tcp. I'm using nmap 6.40 and it's taking more than a minute to run a simple check that. If you are on a more complicated network, use a subnet calculator to determine what your scan range should be.
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If your host doesn't respond to pings — perhaps because it is. Nmap is so slow as to be almost unusable on my windows 8.1 laptop. This occurs for scan types in which open.
I've tried this to confirm that the.
You may have devices on. Usually you get closed in nmap if the initial packet can get through the firewall but is explicitly refused by the os itself, whereas firewall. Nmap places ports in this state when it is unable to determine whether a port is open or filtered. I have tried running nmap on a specific port that i know is open, but nmap still reports host b as being down.
I want to scan an ip range and check if any ips in that scope have rdp enabled on other ports than 3389. I believe by default nmap does a ping scan of the target ip addresses. By default, nmap tests tcp ports.
