Install Protect Agent on NAS, Raspberry Pi or VPS
Choose the Home or Server profile, then install the Synology package or Linux Docker agent.
View installation optionsConcrete methods, explained step by step.
Understand common errors, apply a reproducible method, and then check the result with TechAtelier tools.
Tutorials 13CybersecurityVPN & NetworksWeb & domains
Why monitor your site from outside?
Understand independent control, incident confirmation, history and alerts.
Read the tutorialBack up a website to a NAS with Restic
Consistent SQLite copy, encrypted repository, retention, heartbeat and actually tested restoration.
Read the tutorialSecure public Wi-Fi with a VPN
Hotel, cafe, airport or train: a convenient checklist and real VPN limits.
Read the tutorialMonitor a domain, its TLS certificate and DMARC
Set a reference score and detect DNS, HTTPS and email regressions.
Read the tutorialConfigure SPF, DKIM and DMARC at OVHcloud
Inventory senders, publish records and strengthen DMARC without blocking legitimate messages.
Read the tutorialCommon Docker Compose errors
A checklist on ports, volumes, secrets, privileges, images and resources.
Read the tutorial10 common Dockerfile mistakes
Floating images, secrets, root, downloads, permissions, build context and main process.
Read the tutorialValidate OpenAPI before deployment
Install a useful quality gate without confusing document conformity with real API behavior.
Read the tutorialFix invalid JSON file
Commas, quotes, escaped characters, incomplete blocks and duplicate keys: a step-by-step correction method.
Read the tutorialClean a CSV file before import
Encoding, columns, types, duplicates and output controls to make migration reliable.
Read the tutorialCheck a PDF before sharing or publishing
Check rendering, fonts, links, scripts, metadata, accessibility and archiving.
Read the tutorialDNS audit before production
Addresses, certificates, e-mail, DNSSEC and web headers: the recommended order of checks.
Read the tutorial