Knowledge Base · Page 4

Practical enterprise IT articles built around real failure symptoms and safe troubleshooting order.

Each article follows a consistent sequence: symptoms, likely causes, safe checks, remediation, validation, and rollback. This release adds frequently searched support issues and uses pagination to keep desktop and mobile layouts stable.

Active Directory / GPOFile permissionsNetwork / VPNVDIBackup / NASServers / legacy systems

Priority topics in this release

  • gpupdate succeeds but the GPO is absent
  • Repeated domain-account lockouts
  • Shares fail by hostname
  • Slow internet after VPN connection
  • The port is open but the application fails

The library contains 55 articles across 4 pages. Existing article dates are retained; only this batch uses the current publication time.

Articles

Enterprise IT troubleshooting articles: Active Directory, file permissions, VPN, VDI and backup

Practical enterprise IT articles covering Active Directory, Windows Server, NTFS and share permissions, VPN and firewalls, VMware Horizon, Veeam, NAS, SQL Server and legacy systems.

SQL Server, ERP and legacy systemsExisting article

What to assess before migrating an ageing Windows Server, and how to preserve rollback

Complete dependency inventory, compatibility testing, verified backups, parallel operation, cutover planning, rollback criteria, and business acceptance before migration.

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SQL Server, ERP and legacy systemsExisting article

SQL Server transaction log is too large: how to assess recovery model, log backups, and shrink risk

Identify the log-reuse wait and recovery objective first, then correct log backups or long transactions. Shrink should be a controlled exception, not routine maintenance.

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SQL Server, ERP and legacy systemsExisting article

The SQL Server port is reachable but the ERP client will not open: what should you test next?

Port reachability proves only the network layer. Continue with instance resolution, drivers, TLS, database state, application services, licensing, and client configuration.

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Backup, NAS and business continuityExisting article

Does a NAS with snapshots still need an independent backup, and why are snapshots not backups?

Snapshots provide fast rollback but depend on the source appliance. Combine them with independent replication, offline or immutable copies, and regular recovery tests.

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Backup, NAS and business continuityExisting article

Is TrueNAS suitable for enterprise file sharing, and how should SMB, ACLs, AD integration, and backup be designed?

TrueNAS can serve enterprise file shares when ZFS, SMB, ACLs, security groups, snapshots, independent backup, and cross-platform behaviour are designed deliberately.

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Windows Server and file permissionsExisting article

Should enterprise NAS permissions be assigned by employee, department, role, or security group?

Use department, role, and project security groups, separate read-only and read-write access, and combine them with auditing, offboarding, snapshots, and an access matrix.

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Network, VPN and firewallExisting article

How to separate office, live-streaming, and international traffic across multiple WAN links without automatic failover

Build deterministic routing by source, business destination, and egress policy, disable unwanted load balancing or failover, and validate NAT and return paths.

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Network, VPN and firewallExisting article

SD-WAN vs a conventional VPN: what is the difference and which one fits the business requirement?

A VPN primarily provides encrypted connectivity; SD-WAN adds multi-link control, application awareness, link-quality decisions, central management, and path policy.

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Active Directory and Group PolicyExisting article

How to establish trust between two Active Directory forests and provide cross-domain file access

Cross-domain file access requires routed connectivity, conditional DNS forwarding, time synchronisation, validated trust, cross-domain groups, share permissions, and NTFS ACLs.

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Implementation and project handoverExisting article

Why enterprise IT projects require configuration backups, acceptance evidence, and complete handover documentation

Without handover documentation, operations, troubleshooting, staff changes, and rollback depend on individual memory. Create a verifiable and maintainable configuration baseline.

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