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SYN scan-flag
Half Open" Scan |
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sA
useful on which systems |
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-sN
useful on which systems |
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| Speed: serial / slowest -T paranoid |
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| Speed: Serial / slow -T sneaky |
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| Speed: Serial / Normal -T polite |
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| Speed : Normal / parallel -T normal |
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| Speed : Parallel / fast -T aggressive |
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| Speed: Parallel / fastest -T Insane |
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| Agressive scanning, which uses scripts, and therefore enables the scripting engine, called NSE. |
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| Enables common scripts, and therefore enables the scripting engine, called NSE. |
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| Specified the ports to be scanned. Examples: -p 80 -p 1-65535 -p 23,25,53 |
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| Scans UDP ports 53-57 and TCP ports 80 and 8080. |
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| Ping scan, which enumerates hosts on the network. ICMP ping sent; if no response, a TCP ping is sent. If response is SYN/ACK, the port is open. RST/ACK response indicates a closed port. |
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| SYN/Stealth/Half-open scan:. SYN/ACK means port is open. RST/ACK means port is closed. |
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Version detection: Attempts to determine which service or program is listening on a particular port
and, if possible, the version number of that service or program. |
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| First, it disables ICMP pings, skipping the initial ICMP ping scan. Then, it scan hosts that do not respond to ICMP. Useful to avoid detection. |
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| Performs a protocol scan. 1=ICMP, 2=IGMP, 6=TCP, 17=UDP. |
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| Nmap Scripting Engine (NSE) can do the following: Network discovery Advanced version detection Vulnerability detection Backdoor detection Vulnerability exploitation |
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| Arp scan; puts Nmap and its optimized algorithms in charge of ARP requests, which optimizes scanning an ethernet LAN for hosts |
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| Specify results file newscan.txt |
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| Completely removes the nmap ping requirement from the pre-scanning process. Nmap will still attempt a reverse DNS on the remote station unless the disable reverse DNS (-n) option is used. |
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