Keeping sites and applications online: hosting choices, updates, backups, monitoring and what to do when something breaks.
The service behind this topic: Hosting & maintenance
Security18 min read
A DDoS attack floods a service from many machines at once. How botnets, floods and amplification work, how to spot one, and how DDoS protection stops it.
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Hosting16 min read
Plan backups in six steps: list where data lives, set RPO and RTO, choose backup types, follow the 3-2-1 rule, set retention and test restores.
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Data16 min read
Data compression algorithms remove redundancy to store data in fewer bits. How gzip, Brotli, Zstandard, LZ4 and lossy codecs work, and how to choose.
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Hosting19 min read
Back up a website's database, files, configuration and DNS to a copy outside your host, as often as you can afford to lose changes, and prove it by restoring.
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Hosting17 min read
Protect backups from ransomware: immutable and offline copies, encryption with separate keys, isolated admin accounts, deletion alerts and clean restore tests.
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Security20 min read
How to secure a website: HTTPS with HSTS, prompt updates, MFA for admins, a WAF, tested backups, security headers, email authentication and regular scans.
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Hosting11 min read
Renew an SSL/TLS certificate step by step: check the expiry, create a new key and CSR, pass domain validation, install the full chain and automate renewals.
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