# nmap

> Network exploration tool and security / port scanner.
> Some features only activate when Nmap is run with privileges.
> More information: <https://nmap.org>.

- Check if an IP address is up, and guess the remote host's operating system:

`nmap -O {{ip_or_hostname}}`

- Try to determine whether the specified hosts are up and what their names are:

`nmap -sn {{ip_or_hostname}} {{optional_another_address}}`

- Like above, but also run a default 1000-port TCP scan if host seems up:

`nmap {{ip_or_hostname}} {{optional_another_address}}`

- Also enable scripts, service detection, OS fingerprinting and traceroute:

`nmap -A {{address_or_addresses}}`

- Assume good network connection and speed up execution:

`nmap -T4 {{address_or_addresses}}`

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

`nmap -p {{port1,port2,…,portN}} {{address_or_addresses}}`

- Perform TCP and UDP scanning (use `-sU` for UDP only, `-sZ` for SCTP, `-sO` for IP):

`nmap -sSU {{address_or_addresses}}`

- Perform full port, service, version detection scan with all default NSE scripts active against a host to determine weaknesses and info:

`nmap -sC -sV {{address_or_addresses}}`
