Symantec ProxySG and Advanced Secure Gateway (ASG)

Protect against increasingly sophisticated web threats with a proxy appliance

Symantec ProxySG and Advanced Secure Gateway (ASG) are high-performance on-premises secure web gateway appliances that protect organizations across the web, social media, applications and mobile networks. Combine with cloud-delivered Web Security Service for a centrally managed hybrid secure web deployment.

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11 Times Running*, Gartner Magic Quadrant Leader for Secure Web Gateways

Learn more about the web security market, including its growth drivers and obstacles, and find out which companies are positioned as the 2018 Leaders, Challengers, and Visionaries.


12 Years Running* –– Symantec is a Top Player in the Radicati Corporate Web Security Market Quadrant Report

Top Players in the Radicati Market Quadrant shape the market with their technology and strategic vision. Download a complimentary copy of the 2019 Radicati Group Corporate Web Security Market Quadrant.

Industry's Leading On-Premises Secure Web Gateway

Secure the web with our ProxySG and Advanced Security Gateway Appliances

Symantec Advanced Secure Gateway (ASG) combines the functionality of the Symantec ProxySG secure web gateway with the intelligence of Symantec Content Analysis to offer a single, powerful web security solution that delivers world-class threat protection. Advanced Secure Gateway is a scalable web proxy appliance designed to secure your web communications and accelerate your business applications. ProxySG and ASG draw on a unique proxy server architecture that allows organizations to effectively monitor, control, and secure traffic to ensure a safe web and cloud experience. A Symantec secure web-filtering proxy empowers you to:

  • Control web and cloud usage with fast app performance
  • Establish negative-day threat defenses
  • Implement multi-authentication realm support
  • Gain visibility into encrypted web traffic

Eliminate Your Encryption Blind Spot with Highly Secure HTTPS Inspection

Protect yourself from hidden threats with an "A" grade web security gateway appliance

Get complete visibility into SSL/TLS-encrypted web traffic with Symantec's advanced secure web proxy and cloud security solutions. Academic researchers and internet giants such as Google, Mozilla and others scrutinized Secure Web Gateways, Next-Generation Firewalls and Application Delivery Controllers to see who was delivering secure interception of encrypted web traffic, without introducing new risk. Of all middleboxes in the study, only the Symantec web proxy appliance enabled inspection while preserving high security.

  • Scan SSL-encrypted traffic for viruses, worms, and Trojans, and block them at the secure web gateway
  • Prevent spyware from installing or communicating over SSL/TLS
  • Stop rogue applications (such as IM and P2P) that use SSL to subvert enterprise controls and security measures
  • Accelerate approved and safe SSL-encrypted traffic
  • Send a stream of decrypted traffic to third-party logging systems for analysis, archiving and forensics

Isolate Potentially Risky Traffic by Preventing Malware and Phishing Threats, While Allowing Broad Web Access

Protect your users from threats targeting web browsers

Symantec Web Isolation prevents websites from delivering zero-day malware, protects users' devices by executing web sessions away from endpoints, and safely sends rendering information to the browser. Integration with Symantec Secure Web Gateways such as ProxySG and Advanced Secure Gateway (ASG) enables policy-based traffic isolation for uncategorized sites and for URLs with suspicious or potentially unsafe risk profiles. Specifically, this means:

  • Tight integration with Symantec Secure Web Gateways (ProxySG, ASG, and Web Security Service)
  • Patented approach that prevents any website code from executing on user's devices
  • Responsive and interactive UI for transparent and seamless user experience
  • Selective risky traffic isolation or isolation of all web traffic for privileged users such as C-level executives
  • Isolation of URLs embedded in email to block phishing attacks

Advanced Real-Time Threat Protection

Gain complete protection and control

Add advanced threat protection to your secure web gateway with the Symantec Content Analysis system, featuring multiple anti-malware engines, malware analysis (sandboxing), and endpoint integration. Symantec Intelligence Services and WebFilter offer real-time protection for web content filtering, security categorization, web application control, and other capabilities as an optional subscription.

  • Get the most advanced web security in a web filter proxy
  • Extend real-time sandboxing protection
  • Integrate real-time blocking of advanced threats at the secure web gateway
  • Gain the benefits of centralized file inspection when using Symantec network, endpoint and cloud solutions

Select an Advanced Secure Web Gateway Proxy Architecture as the Foundation of Your Security Infrastructure

Start with strong security, and customize to your needs

Symantec Secure Web Gateway solutions, including ProxySG, Advanced Secure Gateway, Web Security Service, and Virtual Secure Web Gateway deliver strong proxy-based security in an on-premises security gateway appliance, virtual appliance, cloud or hybrid deployment. Our proxy architecture is a core part of our secure web gateway platform: It protects you against web- and network-based threats, enables cloud data protection, and provides flexible business policy control across the enterprise and the cloud, including web, social, and mobile networks.

  • Mitigate risk with full visibility and control for web and cloud access
  • Set policies based on website content-based classifications
  • Assess and control unsanctioned cloud usage
  • Combine security functions for cloud and mobile technologies
  • Enjoy Universal Policy Enforcement and centralized management and reporting

Ensure Solutions Work Together Seamlessly with Integrated Cyber Defense

Maximize the impact of your security investment

The proliferation of web and cloud applications, along with mobile devices, have made the web one of the biggest security threat vectors. Consequently, organizations need an integrated, multi-layered approach to defend against rapidly-evolving security threats.

Symantec ProxySG and Advanced Secure Gateway (ASG) extend powerful network capabilities to our Symantec Integrated Cyber Defense. Together, these tools unify cloud and on-premises security with advanced threat protection and information protection across all endpoints, networks, email, and cloud applications.

  • Advanced proxy architecture- Terminate and filter web and cloud traffic, authenticating web users and enabling granular threat inspection policies, even for SSL/TLS-encrypted traffic
  • File threat prevention- Use multilayer file inspection and customizable sandboxing to block advanced threats
  • Real-time threat intelligence- Using our web filter proxy, tap into our unmatched insight into the dynamic threat landscape with the Symantec Global Intelligence Network, the world's largest civilian threat intelligence network
  • Browsing threat prevention- Integrate web isolation to counter new and multi-vector threats targeting users' web browsing and email

Proxy-Based Secure Web Gateway

A key part of your complete defense architecture

With the introduction of the next-generation firewall (NGFW), many organizations are looking to cut operational expenditures at the cost of their security posture. But look again: A secure web gateway with proxy architecture is a vital complement to your NGFW.

Symantec 2019 Internet Security Threat Report

Our 123 million sensors record thousands of threat events per second from 157 countries and block 142 million threats daily. Use intel from the world’s largest civilian threat network to your advantage—download ISTR 24 now.

Introducing Symantec Integrated Cyber Defense Exchange (ICDx)

Reduce complexity and cost with built-in integrations and streamlined interoperability.

ICDx simplifies product integrations and accelerates customer time to value across the Symantec enterprise portfolio and the industry’s largest partner ecosystem.

  • Remove the friction for security teams when integrating Symantec and third-party products
  • Enhance visibility from a unified view of events across Symantec products for searching, dashboards and reporting
  • Prepare higher quality cyber data to forward to SIEM and other SOC tools enhancing analytics and alerts
  • Speed responses to critical incidents with orchestrated actions targeting multiple Symantec products

Symantec Blogs

Is Healthcare Security in Critical Condition?

Despite progress on several security fronts, experts say it’s time to treat our medical system as...

Posted: 16 May, 2019 | 4 Min Read

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RSAC 2019: A Security Gateway War is Brewing

Symantec’s Nico Popp takes a look at the future of cloud security for unmanaged devices

Posted: 05 Mar, 2019 | 2 Min Read

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Operation Eversion: Eight Indicted in Law Enforcement Takedown

Symantec part of industry group that assisted FBI-led takedown against 3ve ad-fraud scam.

Posted: 27 Nov, 2018 | 3 Min Read

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New Orangeworm attack group targets the healthcare sector in the U.S., Europe, and Asia

Symantec has identified a new attack group dubbed Orangeworm deploying the Kwampirs backdoor in a targeted...

Posted: 23 Apr, 2018 | 4 Min Read

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Data Sheets

ProxySG Value of Maintenance

Learn how current Maintenance provides access to 24/7 technical support and hardware repair/replacement options.

Encrypted TAP

Discover the SSL Visibility feature in our secure web gateway solution.

White Papers

SWG Deployment Methodologies

There are only a few effective methodologies that provide complete security.

Next-Generation SWG

See the features a secure web gateway should have in today’s threat environment.


Value of Maintenance for Network Protection Hardware Products

Learn how keeping current on Maintenance provides rapid access to 24/7 technical support, hardware repair/ replacement, and to new Operating System (OS) features and enhancements so your network is continuously protected from the ever-increasing sophistication and volume of web-based threats.


If You're Moving to the Cloud, Don't Settle for Half Measures

The financial and operational benefits of moving data and on-premises workloads to the cloud is a remarkable tech transition.

Why Uncategorized Web Sites Never Again Need to Befuddle IT

Avoid blindly between blocking or allowing uncategorized sites.

The Dangerous Journey of a Fake WhatsApp App on OneDrive

Symantec recently discovered a new kind of malicious Android file hosted on a OneDrive account.

Don't Try to Defend Your Data by Fighting the Last War

The battlefield perimeter of yesteryear is gone, arm yourself for what's ahead.

Other Resources

Symantec Web and Cloud Security Resource Library

For information on the power of the proxy and cloud-based security solutions visit our resource center.