● Cybersecurity Glossary
What is SSE (Security Service Edge)?
Security Service Edge (SSE) is a cloud delivered convergence of network security services that protects access to the web, cloud applications, and private corporate resources. Gartner introduced SSE in 2021 as the security component of the SASE framework, separating it from the networking side (SD-WAN) so organizations could adopt cloud security at their own pace. SSE combines Secure Web Gateway (SWG), Zero Trust Network Access (ZTNA), Cloud Access Security Broker (CASB), and Firewall as a Service (FWaaS) into a single platform. When paired with SD-WAN, SSE forms a complete SASE architecture.
SSE definition and core capabilities
Security Service Edge (SSE) is a cloud centric security architecture that converges access control, threat protection, data security, and monitoring into a unified service. Gartner defined SSE in its 2021 Hype Cycle for Cloud Security as the set of security functions needed to achieve SASE convergence, delivered primarily from the cloud.
The concept emerged because many organizations wanted to modernize their security stack without overhauling their entire WAN at the same time. Traditional security models routed all traffic through a centralized data center for inspection, which created bottlenecks as workforces became more distributed and applications moved to the cloud. SSE solves this by pushing security enforcement to cloud points of presence closer to users, regardless of where they connect from.
At its core, SSE enforces security based on identity and context rather than network location. It continuously verifies who the user is, what device they are using, what application they want to access, and what level of risk is present before granting access. This aligns with Zero Trust principles: no user or device is trusted by default.
Core components of SSE (Security Service Edge)
SSE brings together four security services that were traditionally deployed as separate products. Consolidating them into a single cloud platform reduces complexity, eliminates gaps between tools, and gives administrators a unified policy engine.
Secure Web Gateway (SWG)
A Secure Web Gateway acts as an intermediary between users and the internet. It inspects all web traffic in real time, filtering out malicious websites, blocking phishing attempts, and enforcing browsing policies. SWG performs SSL/TLS decryption to inspect encrypted traffic (which accounts for over 90% of web traffic today), applies URL category filtering across dozens of categories, and uses threat intelligence to block known bad domains. In an SSE platform, SWG applies to all users regardless of location, so a remote worker gets the same protection as someone in the office.
Zero Trust Network Access (ZTNA)
ZTNA replaces traditional VPNs by providing granular, identity based access to specific applications rather than broad network access. When a user requests access, ZTNA verifies their identity, checks device posture and compliance, evaluates contextual risk factors (location, time, behavior), and then grants access only to the specific application requested. The underlying network and other applications remain invisible. This is sometimes called the “dark cloud” model because applications are hidden from unauthorized users and are not exposed to the internet for scanning.
Cloud Access Security Broker (CASB)
A CASB provides visibility and control over how employees use cloud applications, especially SaaS services. It operates in two modes: inline (proxying traffic to cloud apps in real time) and out of band (connecting to SaaS APIs to scan data at rest). CASB discovers shadow IT by identifying unauthorized cloud apps, applies DLP policies to prevent sensitive data from being shared in cloud storage, and detects compromised accounts through user behavior analytics. As organizations use hundreds of SaaS applications, CASB has become a necessity for data governance.
Firewall as a Service (FWaaS)
FWaaS delivers next generation firewall capabilities from the cloud. It inspects traffic on all ports and protocols (not just web traffic), applies intrusion prevention, and enforces network segmentation policies for remote users and branch offices. FWaaS extends firewall protection to locations and users that do not sit behind an on premises appliance, which is especially relevant as workforces become more distributed.
Additional SSE capabilities: Beyond these four core services, a mature SSE platform may also include Data Loss Prevention (DLP) for sensitive content inspection, remote browser isolation (RBI) to execute risky web content in a sandboxed environment, SaaS Security Posture Management (SSPM) to audit misconfigurations in cloud applications, sandboxing for zero day threat detection, and Digital Experience Monitoring (DEM) to measure the quality of user connections.
Why organizations need SSE?
The security perimeter has changed. Employees connect from home, from airports, and from mobile devices. Applications live in SaaS platforms, public clouds, and on premises data centers. The old model of routing all traffic through a central security stack in the data center no longer works. Here is what changed and why SSE addresses it:
The dissolution of the network perimeter
Traditional security assumed that everything inside the corporate network was trusted. That assumption collapsed when remote work became the norm and cloud applications replaced on premises software. Users now access corporate data from locations that sit entirely outside the traditional perimeter. SSE moves the security enforcement point to the cloud, close to the user, instead of forcing traffic back through the data center.
The growth of SaaS and cloud services
The average enterprise uses hundreds of SaaS applications, many of which are adopted without IT approval (shadow IT). Traditional security tools have limited visibility into what data is being shared, who is accessing these apps, and whether configurations are secure. SSE’s CASB component directly addresses this by discovering cloud app usage, enforcing data policies, and auditing SaaS configurations.
VPN limitations
VPNs were built for a world where a small number of remote users needed access to the corporate network. They grant broad network level access, create performance bottlenecks when thousands of users connect simultaneously, and expand the attack surface if a single device is compromised. ZTNA within SSE replaces this model with granular, application level access that does not place users on the network at all.
Tool sprawl and complexity
Many organizations manage separate products for web filtering, remote access, cloud security, and firewall services. Each product has its own console, policy engine, and logging format. SSE consolidates these into a single platform with unified policies, which reduces operational complexity and closes the gaps that attackers exploit between disjointed tools.
How SSE works?
SSE operates from a globally distributed network of cloud points of presence (PoPs). When a user opens a browser, launches an application, or connects to a corporate resource, their traffic is directed to the nearest SSE PoP for inspection and policy enforcement. This happens transparently, without the user needing to connect to a VPN or change their workflow.
Traffic steering
Traffic reaches the SSE platform through one of several methods: a lightweight agent installed on the user’s device (covering all traffic from managed endpoints), a proxy auto configuration (PAC) file for browser based traffic, IPsec or GRE tunnels from branch office routers, or API integration for out of band SaaS inspection. The agent approach provides the broadest coverage because it captures all traffic from the endpoint, not just web browsing.
Policy enforcement
At the SSE PoP, traffic passes through a security inspection pipeline. The platform decrypts SSL/TLS traffic, identifies the user and device based on directory integration (Active Directory, LDAP, SSO providers), evaluates the request against policy (who is accessing what, from where, on which device, at what risk level), and then allows, blocks, or modifies the connection. Policies can be as granular as allowing a specific user group to view a document in a SaaS app but blocking the download of that document to an unmanaged device.
Single pass inspection
A well designed SSE platform inspects traffic in a single pass through its security stack rather than routing it sequentially through separate SWG, CASB, and firewall engines. Single pass inspection reduces latency and avoids the performance degradation that plagues chained security appliances. The content is decrypted once, scanned by all relevant engines simultaneously, and forwarded to its destination.
Cloud native vs. hosted: Not all SSE platforms are built the same. A purpose built cloud native SSE runs its inspection engines in every PoP, which means security processing happens locally where the user connects. Some vendors host their SSE platform on third party IaaS infrastructure, which can add latency and reduce the consistency of the inspection. When evaluating SSE, verify that the vendor runs its own distributed inspection infrastructure.
How to implement SSE?
Deploying SSE is a phased process. Most organizations do not switch everything overnight. Instead, they start with the most immediate use case (usually securing remote users) and expand from there:
Teldat SSE Solutions
Teldat delivers SSE through be.Safe Pro SSE, a cloud security service that is part of Teldat’s SASE platform. It integrates with Teldat’s SD-WAN solution while remaining fully interoperable with third party networking equipment thanks to its vendor agnostic design.
be.Safe Pro SSE
Teldat’s be.Safe Pro SSE provides Secure Web Gateway (SWG) with over 84 browsing categories, a next generation firewall with IPS/IDS, antivirus, antispam, sandboxing, Data Loss Prevention (DLP), SSL/TLS deep inspection, and application control. A unique feature of be.Safe Pro SSE is its private cloud infrastructure per customer: no shared IP addresses, dedicated cloud resources, and per client logical separation. This guarantees privacy and reliability that multi tenant architectures cannot match.
ZTNA with be.Safe Pro
Teldat’s ZTNA solution is built into be.Safe Pro with three components: an agent installed on each device (digitally signed to prevent unauthorized access from credential theft), a cloud based Broker that manages connections and enforces granular access policies, and a connector deployed as a virtual image near internal applications. The dark cloud architecture hides applications from unauthorized scanning, and Threat Prevention integration detects suspicious behavior and attacks against internal resources.
Integration with SD-WAN for full SASE
be.Safe Pro SSE integrates with Teldat’s CNM SD-WAN Suite for unified management of security and networking from a single console. Organizations can deploy SSE first and add SD-WAN later, or implement both simultaneously. The platform supports both Teldat and third party routers through a simple IPsec tunnel configuration, making it adaptable to any existing network infrastructure. Multiple points of presence across five continents ensure minimal latency for global deployments.
be.Safe XDR integration
SSE telemetry feeds directly into be.Safe XDR for AI powered threat detection and automated response. This closes the loop between prevention (SSE) and detection/response (XDR), giving security teams correlated visibility across network, endpoint, and cloud events from a unified platform.
Teldat’s approach: As both a network hardware manufacturer and security software provider, Teldat delivers SSE integrated with SD-WAN, embedded NGFW, ZTNA, and XDR in a single ecosystem. Organizations can adopt SSE, SD-WAN, or full SASE at their own pace, without replacing existing infrastructure. The be.Safe Pro SSE service uses top tier cloud providers and is offered as Security as a Service, meaning rapid deployment, continuous updates, unlimited scalability, and low total cost of ownership.
Frequently Asked Questions (FAQ’s) about SSE (Security Service Edge)
❯ What is SSE in simple terms?
Security Service Edge (SSE) is a cloud based security platform that protects how users access the web, cloud applications, and private corporate resources. It bundles multiple security tools (SWG, ZTNA, CASB, and FWaaS) into a single service. SSE is the security half of the broader SASE framework.
❯ What is the difference between SSE and SASE?
SASE is the complete framework combining networking and security in the cloud. SSE is the security component of SASE, covering SWG, ZTNA, CASB, and FWaaS. SD-WAN is the networking component. The formula: SD-WAN + SSE = SASE. Organizations can deploy SSE independently or as part of a full SASE platform.
❯ What are the core components of SSE?
The four core components are: (1) Secure Web Gateway (SWG) for web filtering and threat protection. (2) Zero Trust Network Access (ZTNA) for identity based application access. (3) Cloud Access Security Broker (CASB) for SaaS visibility and data control. (4) Firewall as a Service (FWaaS) for cloud delivered firewall protection. Additional capabilities include DLP, sandboxing, RBI, and SSPM.
❯ Does SSE replace a firewall?
SSE includes FWaaS, which delivers cloud based firewall capabilities for remote users and branch offices. However, SSE does not fully replace on premises firewalls. Most organizations use SSE alongside embedded NGFW appliances at branches and data centers. Teldat’s approach combines be.Safe Pro SSE with embedded NGFW for comprehensive coverage.
❯ Why did Gartner create the SSE category?
Gartner introduced SSE in 2021 because organizations needed to modernize their security without restructuring their entire WAN at the same time. SSE lets companies deploy cloud delivered security (SWG, ZTNA, CASB) first and integrate SD-WAN later, making it a practical first step toward full SASE adoption.
❯ How does SSE work with SD-WAN?
SSE handles cloud delivered security (web filtering, access control, threat protection), while SD-WAN handles networking (traffic optimization, path selection, WAN connectivity). When combined, they form a complete SASE architecture. Teldat’s be.Safe Pro SSE integrates with the CNM SD-WAN Suite, providing unified management of both security and networking from a single console.
Secure your Cloud Access with Teldat SSE
be.Safe Pro SSE delivers SWG, ZTNA, CASB, NGFW, and DLP in a unified cloud platform with private infrastructure per customer. Integrate with SD-WAN for full SASE.
