AI-Era Access Control
Breaches aren't a spending problem.
They're an architecture problem.
Record security budgets, record breach headlines anyway. The reason isn’t effort — it’s the shape of the defense: too much complexity, too many ways in — on-premises and across cloud and SaaS — too few ways to say no. Today’s security needs to do more than check IDs at the door, then go blind to the traffic that follows. Every request needs to be verified and controlled. Total Access Control (TAC) by PortSys does exactly that — one enforcement point standing in the path of every request: every identity, every resource, one reverse proxy on your infrastructure.
ENTERPRISE STANDARD • ZERO TRUST VERIFIED • NO RIP & REPLACE
🤖 Zero Trust for the workforce you have — and the one that’s coming. AI Agent Governance is next on the TAC platform, built on the enforcement point already in production. Be first in line →
$10.2M
average cost of a U.S. data breach
an all-time high
(IBM Cost of a Data Breach, 2025)
#1
how breaches now begin
exploiting exposed, internet-facing infrastructure —
ahead of stolen credentials (Verizon DBIR, 2026)
$200B+
global security spend this year
and breach costs still set records
(Gartner forecast)
More tools haven’t fixed it. The shape of the defense has to change.
Trusted BY THE MOST DEMANDING, security-first organizations worldwide
Government, healthcare, finance, energy, manufacturing and critical infrastructure teams rely on TAC to secure access where it matters most.One Platform, Every Identity
Humans Log In. Agents Call APIs. One Enforcement Point Handles Both.
Traditional access tools were built for humans clicking through browsers. Your environment now includes AI agents calling APIs, querying databases, and acting autonomously. TAC’s reverse proxy is built to enforce policy across both — the same rigor, the same audit trail, the same enforcement point. Humans today. Agents next.
Human Access Control
Every session. Every device. Verified.
- Identity and device validation on every session
- SSO portal with adaptive, risk-based authentication
- BYOD posture assessment and compliance checks
- Step-up MFA triggered by risk signals
- Complete, attributed audit trail of every access
AI Agent Access Control NEXT ON TAC
Every API call. Every agent. Governed — by design.
Every agent request already crosses TAC’s proxy. The AI Agent Governance module — next on the platform — will deliver:
- Agent identity verification via certificates and tokens
- Per-action policy enforcement on every API call
- Continuous authorization with scope drift detection
- Blast-radius confinement per agent session
- Full agent activity logging with intent attribution
One Reverse Proxy. One Policy Engine. Built for Every Identity.
Whether the request comes from a browser or a bot, it passes through the same enforcement point. That’s why agent governance belongs in TAC — not in another bolted-on product.
Start Here
Where would you like to start?
TAC serves CISOs, IT teams, and security architects. Each has a different path to the same outcome.
🔒 CISOs & Executives
Board-level risk & AI governance
Your board is asking about AI risk. Your auditors want proof of governance. TAC gives you the policy engine, audit trail, and compliance alignment to answer both — without deploying another point solution.
See What’s Next: AI Agent Governance →⚙️ IT Directors & Infrastructure
Architecture, integrations & deployment
TAC deploys as a reverse proxy in front of your existing infrastructure. No changes to Active Directory, no changes to your apps, no forklift upgrade. Zero Trust access control in days — not months.
See How TAC Fits Your Infrastructure →🛡️ Security Architects & Engineers
Technical depth, specs & compliance
TAC is a reverse proxy with a granular policy engine evaluating identity, device posture, location, certificates, and patch level on every request. No cached credentials. No implicit trust. Every request earns its own authorization.
Get the Technical Specs →Architecture First
Why Architecture Matters
Other vendors bolt agent security onto existing identity tools. TAC was built as the control plane — a reverse proxy that sits between every identity and every resource.
Human Users
Every browser, mobile login, and SSO request
Passes through TAC for identity, device, and posture validation before reaching any application.
TAC Reverse Proxy
The single enforcement point for all access
AI-driven policy engine evaluates every request in real time. No direct exposure. No implicit trust. No blind spots.
AI Agents
Every API call, query, and invocation
Every agent request already flows through the same proxy. Next on TAC: agent-aware identity verification, policy enforcement, and attribution at that same enforcement point.
Why Total Access Control
Zero-Trust Enforcement
Never trust, always verify — for humans and machines alike. TAC evaluates identity, device posture, location, certificates, and patch level on every single request. No session tokens grant permanent access.
Stealth Infrastructure
Your applications are invisible to the internet. TAC’s reverse proxy is the only entry point. No exposed ports. No DNS records pointing to application servers. Your attack surface drops to near zero.
Unified Policy Control
One policy engine governs every access decision. Define rules once — by user, device, location, time, or agent identity — and TAC enforces them consistently across every application, API, and resource.
Compliance & Regulatory
TAC Aligns With the Standards Your Auditors Require
From government agencies to financial institutions to healthcare systems, TAC maps directly to the compliance frameworks your organization must meet.
Federal & Defense
NSA Zero Trust Guidelines
Direct implementation of NSA’s seven Zero Trust pillars
Federal Agencies
NIST SP 800-207 and NIST SP 800-171 CUI
Both frameworks covered.
Law Enforcement
FBI CJIS 5.9
Aligned to CJIS MFA, access control, and audit requirements out of the box
Federal Civilian
CISA TIC 3.0
Aligns with CISA’s updated Trusted Internet Connection guidance
Civilian
SOC2
All five Trust Service Criteria – Security, Availability, Processing Integrity, Confidentiality, Privacy.
Proven Results
Real Organizations. Proven at Scale.
TAC delivers measurable results — without touching your existing authentication, network, or application infrastructure.
Global Consulting & Technology • 35 Countries
ZS Associates
Challenge: 17,000+ users across 35 countries needed frictionless, secure access to hundreds of applications spanning hybrid infrastructure, HIPAA-regulated environments, and Microsoft 365 — while meeting strict data protection requirements. Firewall-stacking and legacy VPN couldn’t scale.
Outcome: 8 TAC instances deployed globally — including behind China’s Great Firewall. 1,300+ federated applications secured. Legacy VPN sprawl eliminated. Zero additional cost for MFA.
“TAC allows us to give more flexibility to our users. They can work from anywhere, safe in the knowledge that TAC actually strengthens security.”
— IT Manager, Enterprise Systems
Financial Services • United States
Portfolio Management Firm
Challenge: Microsoft ended support for their Unified Access Gateway. The firm needed a replacement supporting all device types, reducing VPN hardware costs, and maintaining strict security for 160 employees, clients, and partners.
Outcome: Eliminated $1,000+ per-device VPN hardware. Saved over $100,000 annually vs. competitive alternatives. Expanded secure remote access from 15 to 35 employees. 160 total users on any device.
“TAC is easier, more secure, and much more cost-effective compared to alternative solutions on the market today.”
— Senior Systems Engineer
How TAC Compares — On the Things That Are Hard to Change
Feature lists converge. Architecture doesn’t. Here’s where the platforms structurally differ.
| Capability | TAC by PortSys | Cisco Duo | Okta | Zscaler | Microsoft Entra |
|---|---|---|---|---|---|
| One enforcement point for every app — modern, legacy, and web | Yes single proxy, single console | Partial Network Gateway add-on: web apps, SSH/RDP | Partial Access Gateway: separate product, legacy web apps | Yes most private apps via ZPA | Partial split across App Proxy and Private Access |
| Fully self-hosted — including air-gapped and sovereign environments | Yes deploy anywhere, no vendor cloud required | No cloud control plane | No cloud control plane | Partial on-prem service edge; control plane stays in Zscaler cloud | No cloud-native |
| Traffic never transits the vendor’s cloud | Yes your proxy, your jurisdiction | Partial | Partial | No brokered through Zscaler infrastructure by default | No routed via Microsoft’s service |
| Policy evaluated on every request — identity, device, posture, context | Yes inline, per request, incl. payload¹ | Partial evaluated at authentication | Partial evaluated at authentication | Partial inline, connection-level | Partial CAE reacts to events, not per-request |
| Legacy app protection without code changes, agents, or a separate gateway | Yes same proxy, no add-ons | No requires Network Gateway | No requires Access Gateway | Partial requires app connectors | No requires App Proxy |
| Applications invisible to the internet — zero inbound exposure | Yes proxy is the only entry point | No | No | Yes inside-out connections | Partial |
| MFA, SSO, ZTNA, and DLP in one license | Yes no per-module pricing | No sold by edition | No sold per product | No sold by module | No tiered licensing + add-ons |
| Single inline enforcement point built for humans and AI agents | Yes by architecture² | No | Partial IdP-side | Partial | Partial IdP-side |
¹ Full request inspection — method, URL, headers, and payload — with scriptable inspection policies for custom and proprietary protocols.
² AI Agent Governance module: next on the TAC platform, built on the enforcement point already in production. Be first in line →
Assessments reflect PortSys analysis of publicly available vendor documentation as of August 2026.
Ready to Control Every Identity
in Your Enterprise?
TAC deploys in days. No infrastructure changes required. Book a session with a PortSys engineer and see exactly how it fits your environment.