> For the complete documentation index, see [llms.txt](https://cotidocs.geordier.co.uk/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cotidocs.geordier.co.uk/extra-recommended-info.md).

# Extra Recommended Info

- [Firewall / Ports](https://cotidocs.geordier.co.uk/extra-recommended-info/firewall-ports.md): You may ignore this page, this is just for information purposes only for people wanting to configure their firewalls manually etc.
- [Two Factor Authentication](https://cotidocs.geordier.co.uk/extra-recommended-info/two-factor-authentication.md)
- [Node Hardening](https://cotidocs.geordier.co.uk/extra-recommended-info/node-hardening.md)