VPN Replacement
Replace your legacy VPN with Total Access Control — faster, more secure, application-aware zero trust access that eliminates the network-level exposure VPN was never designed to prevent.
VPN Was Built for a Different Era
VPN was designed when the enterprise perimeter was clear — office inside, internet outside. It grants network-level access, meaning a connected user can reach anything on that network segment. One compromised credential gives an attacker the same access as your employee.
Today’s hybrid workforce, cloud-hosted applications, contractor access, and AI agent workflows have made that model structurally broken. VPN cannot provide application-level access control, cannot enforce device posture continuously, and cannot govern non-human identities.
Most enterprises know they need to move on. The question is what they replace VPN with — and whether that replacement actually solves the problem or just moves it.
Why VPN Fails Modern Security Requirements
Application-Level Access. Not Network-Level.
TAC’s reverse proxy architecture grants access to specific applications — not to networks. Users get exactly what they need, nothing more.
Per-Application Access
Every user gets access to specific applications, not network segments. A contractor accessing the project portal cannot reach HR systems, financial tools, or any other application they are not explicitly permitted to access.
Continuous Device Posture
Device compliance validated on every request — OS patches, antivirus, disk encryption, domain join. Not just at connection time. A device that falls out of compliance loses access immediately, mid-session.
Full Audit Visibility
Every access event logged with complete attribution — who accessed which application, from which device, at what time, and what policy decision was made. No VPN blind spots.
Human and AI Agents
TAC governs both human users and AI agents through the same policy engine — eliminating the uncontrolled service account API keys that VPN never addressed.
Legacy App Support
TAC protects every application — including the thick-client and forms-based systems your VPN currently covers but your identity provider cannot reach. No application left unprotected.
One Open Port
All traffic flows through a single TLS 1.3 encrypted port. Every inbound firewall port your VPN currently requires can be closed — reducing your attack surface to near zero.
TAC vs. VPN
Run TAC Alongside VPN During Transition
TAC does not require a forklift migration. You can deploy it alongside your existing VPN, onboard applications incrementally, and retire VPN connections as each application is migrated — at your own pace and on your own timeline.
Most organisations complete the transition to full TAC coverage within 90 days of initial deployment, though some choose a longer parallel-run period for risk management or compliance reasons.
TAC deploys in hours — not months. Your first applications can be protected the same day your SVA goes live.
Typical Migration Path
Ready to Replace Your VPN?
Book a 30-minute session with a PortSys engineer and we will show you exactly how TAC replaces VPN in your specific environment.