![]() ![]() (seconds), 'm' (minutes), or 'h' (hours) to the value (e.g. Options which take are in milliseconds, unless you append 's' osscan-guess: Guess OS more aggressively osscan-limit: Limit OS detection to promising targets script-updatedb: Update the script database. ![]() script-trace: Show all data sent and received script-args=: provide arguments to scripts version-trace: Show detailed version scan activity (for debugging)ĭirectories, script-files or script-categories version-all: Try every single probe (intensity 9) version-light: Limit to most likely probes (intensity 2) version-intensity : Set from 0 (light) to 9 (try all probes) sV: Probe open ports to determine service/version info port-ratio : Scan ports more common than r: Scan ports consecutively - don't randomize F: Fast mode - Scan fewer ports than the default scan dns-servers : Specify custom DNS servers n/-R: Never do DNS resolution/Always resolve PE/PP/PM: ICMP echo, timestamp, and netmask request discovery probes PS/PA/PU/PY: TCP SYN/ACK, UDP or SCTP discovery to given ports ![]() Pn: Treat all hosts as online - skip host discovery sL: List Scan - simply list targets to scan That's all about it, there are lot of examples, and usage guide on their webpage, even in Hungarian. This is the de-facto standard port scanning utility. ![]() I couldn't write it better (source: ) :-) The tool has tons of options, worth to play around with it. Switch#show interface GigabitEthernet0/4 switchportĪdministrative Trunking Encapsulation: negotiateĪdministrative Native VLAN tagging: enabledĪdministrative private-vlan host-association: noneĪdministrative private-vlan mapping: noneĪdministrative private-vlan trunk native VLAN: noneĪdministrative private-vlan trunk Native VLAN tagging: enabledĪdministrative private-vlan trunk encapsulation: dot1qĪdministrative private-vlan trunk normal VLANs: noneĪdministrative private-vlan trunk associations: noneĪdministrative private-vlan trunk mappings: none Switch(config)# interface GigabitEthernet0/4 ![]()
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