# Page Not Found

The URL `port-21-telnet` does not exist.

You might be looking for one of these pages:
- [Port 23 Telnet](https://notes.cavementech.com/pentesting-quick-reference/port-23-telnet.md)
- [Port 22 SSH](https://notes.cavementech.com/pentesting-quick-reference/port-22-ssh.md)
- [Port 25 - SMTP](https://notes.cavementech.com/pentesting-quick-reference/port-25-smtp.md)
- [Port 53 DNS](https://notes.cavementech.com/pentesting-quick-reference/port-53-dns.md)
- [Port 161 SNMP](https://notes.cavementech.com/pentesting-quick-reference/port-161-snmp.md)

## How to find the correct page

1. **Browse the full index**: [/sitemap.md](https://notes.cavementech.com/pentesting-quick-reference/sitemap.md) - Complete documentation index
2. **View the full content**: [/llms-full.txt](https://notes.cavementech.com/pentesting-quick-reference/llms-full.txt) - Full content export

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/pentesting-quick-reference/port-23-telnet.md`)
- Use `Accept: text/markdown` header for content negotiation