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Guides from the NOC

Written from running the hardware — what breaks, why, and the command that fixes it.

3 posts matching “dns-01” · Clear

All 3 Most read VPS 2 Troubleshooting 1
VPS Wildcard SSL with Let's Encrypt: DNS-01 Setup Guide

Wildcard SSL failing over HTTP-01? Learn why Let's Encrypt needs DNS-01 validation and how to set up wildcard certs with Certbot or acme.sh.

15 July 2026 · 6 min · 22 views Troubleshooting Let's Encrypt Rate Limits: Every Limit and How to Fix 'Too Many Certificates'

Every Let's Encrypt rate limit with the official numbers - 50 per registered domain, 5 per exact set of identifiers every 7 days - and how to fix each one.

22 July 2026 · 6 min · 30 views VPS Certbot Renewal Failing on Your VPS: Causes and the Fix

Let's Encrypt renewal failing on your VPS? Learn the six real causes - port 80, DNS-01, rate limits, missing hooks - and fix each one step by step.

13 July 2026 · 6 min · 15 views