🛡️ SASE

Secure Access Service Edge for a Cloud-First, Zero-Trust WAN

SASE (Secure Access Service Edge) converges SD-WAN (Software-Defined WAN) with cloud-delivered security so users, devices, and workloads connect securely and optimally from anywhere—branch, home, or on the move. Instead of hair-pinning traffic through legacy hubs and VPN concentrators, SASE evaluates identity, device posture, context, and data sensitivity at the nearest cloud edge and enforces Zero-Trust policy per session.

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✉️ contact@solveforce.com

Where SASE fits in the SolveForce model:
🌐 Connectivity (Grammar) → Connectivity • 🔀 Control → SD-WAN • ☁️ Cloud (Syntax) → Cloud
🔒 Security (Semantics) → Cybersecurity • 🧠 Decision Layer → SolveForce AI
🖧 Fabric → Networks & Data Centers

🎯 Outcomes (Why SASE)

  • Any-to-any, securely — users and apps meet at the closest cloud security PoP, not a far hub.
  • Per-app Zero Trust — ZTNA (Zero Trust Network Access) replaces flat VPN; every session is authenticated and authorized. → ZTNA
  • Better experience — application-aware path selection (via SD-WAN) + local cloud inspection = lower latency and fewer bottlenecks. → SD-WAN
  • Unified policy — one console for web gateway (SWG), CASB (Cloud Access Security Broker), FWaaS (Firewall as a Service), DLP, and ZTNA. → DLP
  • Provable control — identity, device posture, and data policy logged to SIEM/SOAR with auditable SLOs. → SIEM / SOAR

🧱 What Makes Up SASE (Spelled Out)

  • SD-WAN Transport— centralized policy, app-aware steering, dual/multi-path resilience. → SD-WAN
  • SWG (Secure Web Gateway)— URL/SSL inspection, malware blocking, content policy.
  • CASB (Cloud Access Security Broker)— SaaS discovery/control, session security, shadow-IT governance.
  • FWaaS (Firewall as a Service)— L3–L7 inspection from the cloud edge; geo/IP lists, app control.
  • ZTNA (Zero Trust Network Access)— per-app, per-session identity and posture enforcement; replaces full-tunnel VPN. → ZTNA
  • DLP (Data Loss Prevention)— inline and out-of-band inspection for sensitive data (PII/PHI/PAN). → DLP
  • Identity & Posture— IAM/SSO/MFA (Identity & Access Management / Single Sign-On / Multi-Factor Auth), device health via EDR/MDM/UEM. → IAM / SSO / MFA • EDR / MDR / XDR • MDM / UEM

Some vendors market the security half as SSE (Security Service Edge); SolveForce designs SASE holistically with SD-WAN + SSE so transport and security decisions remain in sync.

🧭 When SASE Is the Right Move (and When to Pair It)

Choose SASE when you need:

  • Hybrid/remote work at scalewithout scaling legacy VPN concentrators.
  • Direct-to-cloudSaaS/IaaS with consistent inspection (no hair-pinning).
  • Per-session Zero Trustfor third parties/contractors and BYOD.
  • Unified policy & loggingacross web, SaaS, private apps, and data.

Pair SASE with:

  • Direct cloud on-ramps (AWS Direct Connect, Azure ExpressRoute, Google Interconnect) for deterministic latency to VPC/VNet workloads. → Direct Connect
  • MPLS where strict L3VPN/QoS contracts are required, with SASE providing Internet/SaaS security. → MPLS

🧠 Policy Model (Identity → Device → App → Data → Context)

SASE evaluates who, what, and where before allowing which access:

  1. Identity — user group/role via IAM/SSO/MFA. → IAM / SSO / MFA
  2. Device posture — EDR/UEM status, OS version, disk encryption, jailbreak/root checks. → EDR / MDR / XDR • MDM / UEM
  3. Application — sanctioned SaaS, private apps, or general web; app risk score.
  4. Data sensitivity — inline DLP policies (PII/PHI/PAN), file fingerprinting, watermarking. → DLP
  5. Context — geolocation, ASN, time, session risk, real-time behavior.

Decision: grant least-privilege access to one app (ZTNA), apply SWG/CASB/FWaaS rules, or deny/isolate (e.g., Remote Browser Isolation, read-only).

🧱 Reference Architecture

  • Edges/PoPs— users hit the nearest cloud security PoP; private apps published via ZTNA connectors (outbound-only).
  • Underlays— fiber DIA, fixed wireless, LTE/5G, satellite, MPLS—steered by SD-WAN SLOs. → Connectivity • SD-WAN
  • Hubs— optional regional hubs near cloud regions for private on-ramps. → Networks & Data Centers • Direct Connect
  • Control Plane— centralized SASE console for policy, identity integration, and logging out to SIEM/SOAR. → SIEM / SOAR

📐 SLO Guardrails (User Experience You Can Measure)

MetricTarget (Regional)Notes
PoP attach latency≤ 20–40 ms to nearest PoPVaries by geography/provider density
SaaS round-trip (key apps)≤ 80–120 ms typicalClass-C SLO from branch/home
SSL inspection throughputSized to avoid added queuingAllocate per-site/user concurrency
ZTNA session setup≤ 1–3 s to first byteCache policy and pre-auth where safe
Availability≥ 99.95–99.99% (edge fabric)Dual PoPs/sites for critical users

Measure with synthetics (SaaS/API checks), controller stats, and RUM for real browsers. → NOC Services

🔒 Data & Threat Controls (Concrete Examples)

  • SWG— decrypt/inspect TLS where policy permits; enforce acceptable-use and file rules.
  • CASB— Session control on SaaS (download blocked for unmanaged devices; watermark on view).
  • FWaaS— L3–L7 policy: geo/IP allowlists, app control, IPS/IDS, DNS filtering.
  • ZTNA— per-app access with device posture; admin apps require PAM elevation. → PAM
  • DLP— redact SSNs/PCI; quarantine or encrypt; route to review queue. → DLP
  • Email Front Door— pair with Email Security + DMARC/SPF/DKIM at MX/edge. → Email Security • Email Authentication

🧭 Design Patterns (By Outcome)

A) Hybrid Work Everywhere

  • ZTNA for private apps; SWG for web; CASB for SaaS; device posture required for write-access.
  • SD-WAN local breakout for SaaS; identity-based policy cloud-wide.

B) Cloud-First Branches

  • SD-WAN edges in branches; SASE PoP for inspection; private on-ramp at regional hubs for low-jitter VPC/VNet access. → Direct Connect

C) Third-Party Access (Contractors/Partners)

  • No network-level VPN. Publish apps via ZTNA; restrict to read-only or RBI; session recording on privileged paths.

D) High-Reg / PHI/PCI

  • DLP controls at edge; tokenization server-side; ZTNA with PAM for admin access; immutable logging to SIEM.

🧰 Migration Guide (VPN → ZTNA, SWG, CASB)

  1. Inventory & classify apps (private/SaaS/web); map users & device types.
  2. Identity backbone — ensure SSO/MFA and group structure; enroll devices into EDR/UEM. → IAM / SSO / MFA • EDR / MDR / XDR • MDM / UEM
  3. Pilot ZTNA on one app group; add SWG policy; stage CASB session control for sanctioned SaaS.
  4. Rollout in rings: exec IT → pilot BU → broad; keep VPN as tertiary during transition.
  5. Decommission legacy full-tunnel VPN concentrators once coverage is proven.

🔭 Observability & Evidence

  • Per-app SLOs— attach latency, session setup time, CASB actions, DLP events.
  • Experience telemetry— RUM for key user journeys; API synthetics from branches/home.
  • Security analytics— SWG/ZTNA/CASB/FWaaS logs → SIEM/SOAR; incident playbooks for auto-contain. → SIEM / SOAR
  • Change audits— who changed what policy, when; rollback points and approvals.

💵 Commercial Notes (What Drives Cost)

  • User count / concurrency(named vs. active).
  • Feature bundles(SWG/CASB/FWaaS/ZNTA/DLP) and log retention tiers.
  • PoP coveragein your geographies; private on-ramp requirements.
  • SD-WAN edges(hardware/virtual) and underlay mix (fiber, 5G, satellite).
  • Support tierand incident SLAs.

We’ll model TCO vs. legacy VPN + scattered security tools; SASE consolidation often reduces total cost while improving user experience.

✅ Pre-Engagement Checklist

Users & devices
managed vs. BYOD; OS mix; EDR/UEM readiness.
Identity
SSO/MFA groups; HR-driven lifecycle; PAM for admins.
Apps
private app inventory; sanctioned SaaS; risky/unsanctioned SaaS list.
Data
what needs DLP/tokenization; legal/geo constraints.
Underlays
per-site transports and SLOs; SD-WAN presence.
SLOs
attach latency, session setup, availability; reporting cadence.

🔄 Where SASE Fits (Recursive View)

1) Grammar — underlays & paths managed by Connectivity / SD-WAN
2) Syntax — delivery patterns aligned to Cloud (local breakout, hubs, on-ramps)
3) Semantics — per-session truth via ZTNA/SWG/CASB/DLP → Cybersecurity
4) Pragmatics — telemetry informs SolveForce AI for prediction/auto-tuning
5) Foundation — shared terms enforced by Primacy of Language
6) Map — indexed and cross-linked in SolveForce Codex and Knowledge Hub

📞 Design a SASE You Can Prove

📞 (888) 765-8301
✉️ contact@solveforce.com

Related pages:
SD-WAN • ZTNA • DLP • IAM / SSO / MFA • EDR / MDR / XDR • MDM / UEM • Cybersecurity • Direct Connect • Connectivity • Knowledge Hub

Key terms in plain language

Open a term for a concise explanation of language used on this page.

Fiber Internet

Internet delivered through strands of glass using light. Fiber commonly supports high capacity, low latency, and strong upload performance, but availability must be confirmed for the exact address.

Latency

The time it takes data to travel between two points. Lower latency improves voice, video meetings, cloud applications, gaming, and other real-time services.

Dedicated Internet Access (DIA)

A business-grade Internet connection with capacity dedicated to the customer rather than shared in the same way as typical consumer broadband. It often includes symmetrical speeds and an SLA.

SD-WAN

Software-defined wide area networking. It manages multiple connections and chooses paths based on application needs, performance, and policy to improve resilience and control.

MPLS

Multiprotocol Label Switching, a private-network technology that directs traffic along managed paths. Organizations use it for predictable connectivity between locations.

VPN

A virtual private network creates an encrypted connection across another network, commonly allowing remote users or offices to access private resources securely.

Infrastructure as a Service (IaaS)

Cloud-based servers, storage, and networking that customers configure and manage without owning the underlying data-center hardware.

Software as a Service (SaaS)

Software accessed as an online service instead of being installed and maintained entirely on the customer’s own computers or servers.