tldr/pages/common/nmap.md

# nmap

> Network exploration tool and security/port scanner.
> Some features (e.g. SYN scan) activate only when `nmap` is run with root privileges.
> More information: <https://nmap.org/book/man.html>.

- Scan the top 1000 ports of a remote host with various [v]erbosity levels:

`nmap -v{{1|2|3}} {{ip_or_hostname}}`

- Run a ping sweep over an entire subnet or individual hosts very aggressively:

`nmap -T5 -sn {{192.168.0.0/24|ip_or_hostname1,ip_or_hostname2,...}}`

- Enable OS detection, version detection, script scanning, and traceroute:

`sudo nmap -A {{ip_or_hostname1,ip_or_hostname2,...}}`

- Scan a specific list of ports (use `-p-` for all ports from 1 to 65535):

`nmap -p {{port1,port2,...}} {{ip_or_host1,ip_or_host2,...}}`

- Perform service and version detection of the top 1000 ports using default NSE scripts, writing results (`-oA`) to output files:

`nmap -sC -sV -oA {{top-1000-ports}} {{ip_or_host1,ip_or_host2,...}}`

- Scan target(s) carefully using `default and safe` NSE scripts:

`nmap --script "default and safe" {{ip_or_host1,ip_or_host2,...}}`

- Scan for web servers running on standard ports 80 and 443 using all available `http-*` NSE scripts:

`nmap --script "http-*" {{ip_or_host1,ip_or_host2,...}} -p 80,443`

- Attempt evading IDS/IPS detection by using an extremely slow scan (`-T0`), decoy source addresses (`-D`), [f]ragmented packets, random data and other methods:

`sudo nmap -T0 -D {{decoy_ip1,decoy_ip2,...}} --source-port {{53}} -f --data-length {{16}} -Pn {{ip_or_host}}`