LW IT Solutions
7 articles in this category
Follow this category by RSSHere you will find step-by-step guides from the IT & Networks category. The posts walk you through each stage and explain the settings that matter along the way.
A server that sends only its own certificate looks fine in every browser and fails in curl, in payment callbacks and in webhooks. The reason is a repair that browsers perform quietly and other clients do not.
HTTP security headers depend on values, browser support and interactions between policies. A practical explanation of CSP, HSTS, framing protection and Referrer-Policy.
SPF checks sending authorisation, DKIM verifies signed message parts, and DMARC checks alignment with the visible From domain. The receiver decides whether to accept or reject email.
Fifteen devices drawing 168 watts can exhaust a 400-watt switch, because a switch reserves by class rather than by measurement. Which of the two numbers applies is a setting – and knowing which one decides whether the sixteenth device gets power.
A technical guide on setting up a sovereign Zero-Trust DNS infrastructure using Pi-hole and Unbound with DNSSEC validation and query minimization.
A technical step-by-step guide on deploying IEEE 802.1X RADIUS authentication and dynamic VLAN assignment on Ubiquiti UniFi switches for enterprise LAN security.
A nearly full filesystem needs a diagnosis before cleanup. Large individual files are one possible cause; many small files, open deleted files or filesystem-specific storage can also matter. The following commands inspect usage on Ubuntu and Debian. The commands do not delete files. First identify the filesystem After connecting through SSH, an absolute path defines […]
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