Feature Briefs

Intelligent Proxy

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Sometimes securing your organization can feel like a lose-lose for everyone. Take web proxies, for example. They frustrate end users with slower speeds. And for security admins, you're only getting coverage for web ports 80 and 443 and maintaining a proxy can be a pain. With Cisco Umbrella's intelligent proxy, we're able to take the best of a proxy — visibility and control — and discard all the bad. Umbrella is a cloud security platform that provides the first line of defense against threats on the internet. We use the Domain Name System (DNS) as the main mechanism to get traffic to our platform for analysis. Since DNS is a fundamental component of how the internet works and is used by all devices, that makes it an effective and comprehensive way to ensure you see all internet requests — and can stop threats over all ports and protocols. While DNS is the first point of inspection, we also have a cloud-based web proxy for deeper inspection. But we set out to reimagine how a proxy should work. First, let's look at how this was done in the past. A traditional web gateway will proxy all web connections — safe, malicious, and risky — negatively impacting your network performance and availability. And, deployments are often complex, requiring always-on VPNs, PAC files and GRE/IPsec tunnels. Umbrella's intelligent proxy only routes requests to risky domains, or sites containing both known safe and known malicious content, for deeper inspection. And it requires no additional deployment beyond pointing your DNS to Umbrella! With the use of a smarter proxy, we avoid the need to proxy requests to domains that are already known to be safe or bad. Most phishing, malware, ransomware, and other threats are hosted on domains that are classified as malicious. Simple — we block those threats at the DNS layer, with no need to proxy. A domain that poses no threat — say a content-carrying domain for Netflix or YouTube? Umbrella will allow it, and again, no proxy required. Beautiful. Yet some domains are a little trickier – like domains associated with a web server or site that have the possibility of hosting malware. These can include sites that allow users to upload and share content such as Reddit or Pastebin — making them difficult to police. Obviously, if you allow all traffic to these risky domains, users might access malicious content, resulting in an infection or data leak. But if you block traffic, you can expect false positives, an increase in support inquiries, and thus, more headaches. By only proxying risky domains, the Umbrella intelligent proxy delivers more granular visibility and control. The Cisco Umbrella intelligent proxy. F E AT U R E B R I E F © 2017 Cisco and/or its affiliates. All rights reserved. Key Benefits • Granular protection at the URL and file level • Simpler configuration and management compared to traditional proxies • Better performance for end users compared to traditional proxies • Does not require any additional software or hardware • Custom URL blocking • All proxy activity is logged and available for viewing by the security team Intelligent proxy Deeper inspection Security controls DNS and IP enforcement Risky domain inspection through proxy SSL/TLS decryption available Destinations Original destinations or blocked page Internet traffic On-and off-network Safe Original destinations Blocked Modified destinations

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