Know what you protect
Inventory servers, endpoints, network equipment, cloud services, accounts and external connections. Assign an owner, criticality and acceptable downtime to each important asset.
Treat identity as a perimeter
Use MFA for email, VPN, remote administration and privileged access. Separate administrative and daily accounts, remove dormant identities and review excessive permissions.
Make vulnerability management continuous
Prioritize internet-facing, actively exploited and business-critical weaknesses. Record exceptions with an owner, deadline and compensating controls.
Limit blast radius
Segment user, server, production, guest and management zones. Allow required flows rather than trusting everything inside the network.
Make recovery survive the incident
Separate backups from production credentials and test restoration. Define acceptable data loss and recovery time for critical services.
Connect telemetry to action
Centralize authentication, administrative, security-control, perimeter and critical-server events. Prepare escalation and incident-response roles before an emergency.
This baseline is a managed foundation. Add specialized controls only where the threat model and business impact justify them.