Environment
- Single VLAN carrying all traffic types
- Hypervisor and switch management reachable from user devices
- Shared administrative accounts without multi-factor authentication
- Monitoring limited to basic host up/down checks
Healthcare administration
Network segmentation and infrastructure hardening
A flat network placed servers, workstations, phones and management interfaces in the same broadcast domain. Any compromised endpoint had a direct path to critical systems, and voice quality suffered during data bursts.
- VLAN segmentation
- Firewall policy
- MFA
- Monitoring
Architecture
- Separate VLANs for servers, users, voice, guests and management
- Default-deny policy between segments with documented exceptions
- QoS marking so voice traffic is prioritised over bulk data
- Multi-factor authentication on every administrative entry point
- Service-level monitoring with predictive alerts on capacity and certificate expiry
Implementation
- Traffic flows captured before segmentation so exceptions were based on evidence
- Management plane isolated first, then workload segments introduced in stages
- Individual administrator accounts issued and shared logins retired
- Runbooks written for the top failure scenarios and escalation paths agreed
- Change log, IP plan and topology diagram handed over with the environment
Outcome
- A compromised workstation no longer has a direct path to critical systems
- Voice quality is stable through data-heavy periods
- Administrative access is attributable to an individual engineer
- Alerts now fire ahead of capacity and certificate-related outages
Scope the work before you commit budget
Send the environment details and get an engineered proposal with assumptions, risks and a rollback path.