> For the complete documentation index, see [llms.txt](https://cajac.gitbook.io/ctf-notes/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cajac.gitbook.io/ctf-notes/enum/network-discovery/information-gathering.md).

# Information Gathering

## Whois Enumeration

### Domain Lookup

```bash
whois -h <whois_server> <domain>
```

### IP Looup

```bash
whois -h <whois_server> <IP>
```

## Resources

whois - Linux manual page: <https://linux.die.net/man/1/whois>