If you are using firewalld to protect your system, you may at times need to open local ports to let traffic into your machine.

Ever since I rebuilt this site on Zola, one thing has been conspicuously missing: comments.

I've generally been unconcerned with their absence, and - being a static site - wasn't sure if it was practically achievable either.

Every now and then I need to expose a service running on a local machine to the internet, usually just temporarily. Rather than opening ports on a router or mucking about with firewall rules, a reverse tunnel does the job nicely.

There are a number of providers offering this kind of reverse tunnel, including:

• Cloudflare Tunnel
• ngrok
• localtunnel
• bore
• Tailscale Funnel