Diagnose a VSS backup error
Diagnose a VSS backup failure without deleting snapshots at random by checking writers, providers, shadow storage, events, services, a controlled snapshot test, and the backup job afterward.
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Library
Procedures
Des méthodes structurées, vérifications et commandes directement utilisables.
Configure SMTP email sending from a WordPress site
Configure WordPress to send through authenticated SMTP with an aligned sender, correct Reply-To, SPF, DKIM and DMARC alignment, connectivity testing, and limited mail logging.
View →Redirect an old domain to a new WordPress site
Migrate an old domain to a new WordPress site without losing paths by keeping HTTPS on both domains, defining a URL mapping, issuing server-side 301 redirects, testing at scale, updating Search Console, and monitoring 404s.
View →Implement a 3-2-1 backup strategy
Design a true 3-2-1 backup strategy with workload inventory, agreed RPO and RTO, two independent backup copies, one off-site copy, offline isolation or immutability, and regular restore tests.
View →Handle a VMware VM with an inconsistent snapshot chain
Handle an inconsistent VMware snapshot chain without editing descriptors at random by freezing risky changes, inventorying VMDK files, checking vmkfstools and logs, using supported consolidation, clone, or restore paths, and validating the VM.
View →Resolve a VMDK "capacity was reduced" error
Diagnose a VMDK replication error reporting that capacity was reduced by comparing source and target geometry, snapshots, descriptors, and change history before rebuilding the replica chain cleanly when required.
View →Respond to fraudulent connection attempts on a VPN
Respond to VPN brute-force or password-spraying attempts by preserving logs, searching for successful sign-ins, protecting accounts, limiting attempts, requiring MFA, reducing exposure, and monitoring for recurrence.
View →Diagnose slow or unresponsive Outlook
Diagnose classic Outlook that is slow, frozen, or stuck processing by separating cloud service health from workstation issues, add-ins, OST or PST files, profiles, indexing, shared mailboxes, and system resources.
View →Configure SPF, DKIM and DMARC for a domain
Configure SPF, DKIM, and DMARC using current standards by inventorying legitimate senders, publishing one minimal SPF record, enabling aligned DKIM, deploying DMARC with aggregate reports, and validating Authentication-Results.
View →Resolve an automatic IP address or unavailable DHCP issue
Diagnose an APIPA 169.254.x.x address or DHCP failure by isolating the client, switch port and VLAN, DHCP DORA exchange, relay or IP helper, scope, server availability, and UDP 67/68 filtering.
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