Proxy blockers are major requirement for Web security. A Web proxy is a computer, server or application that provides an indirect connection to the Internet, bypassing your existing networking and security devices for unrestricted, uncontrolled and unprotected access to the Web. Web proxies are easy to find and use; their popularity has dramatically increased in recent years because they do not require a person to be technically savvy or have specific programming knowledge. This translates into the largest Web security gap in existence and all Web security solutions must have proxy blocking as a core technology in order to provide real protection and control of Web traffic.
With more and more time spent on social networking, music downloading, streaming video and other recreational activities, users often resort to Web proxies in an effort to gain unrestricted Web access. However, this unrestricted access through Web proxies leaves your network vulnerable to acceptable use policy violations and serious threats like botnets, Trojans, worms and other types of viruses and malware. And since most traditional solutions only inspect URL-based traffic, it is usually very easy to find and connect to Web proxies that circumvent content filters and firewalls. Proxy Blocker prevents any type of Web proxy including anonymizers, tor networks, tunneling, encrypted proxies, and many more. The combination of proprietary signatures and deep packet inspection allows Proxy Blocker to identify and block all Web proxies regardless of port, protocol or application to ensure network security and compliance.
DeepNines Proxy Blocker detects and eliminates Web-based proxies that circumvent network security and filtering solutions. By identifying, reporting and preventing Web proxies in real-time, Proxy Blocker protects against users bypassing content filtering, security policies and malware detection across all ports and protocols. And since the DeepNines approach is based on detecting the fundamental technology used by the proxy, Proxy Blocker can immediately block all Web proxies without knowing the specific IP address or URL.
Key Features
Technology Purpose
Technical Detail
Key Features
Complete proxy blocking
Eliminates any security and filtering circumvention
Prevents inappropriate, illegal or unwanted Web traffic
Supports SafeSearch mode in Google and Yahoo!
Technology Purpose
DeepNines products that utilize Proxy Blocker are the Secure Web Gateway and Trust Agent, and the technology’s protection and findings are logged for reporting by the Network Security Manager.
Technical Detail
There are over 26 different types of Web proxies, and Proxy Blocker eliminates them all. The chart below outlines some of the more popular types of Web proxies, and how they typically work when bypassing filtering and firewall policies.
TYPE
DESCRIPTION
BLOCKED BY DEEPNINES
Anonymous Proxies
Anonymous proxies are the most common type of Web proxy and therefore easiest to block. These are generally URL-based and offer an embedded feature that allows users to bypass the network through an interface on the website.
Circumventors
Circumventor software can be placed on a home (or any out-of-network) computer, and it will return a URL that acts as a proxy and can be used to connect back to that computer for anonymous browsing. These URLS are dynamic and easily changed if ever discovered and blocked.
Tor Network
The Tor network is a network of virtual tunnels that creates an indirect connection to the Internet by having the desired connection to hop through all of the computers on the Tor network before reaching its final destination, therefore disguising the browsing session and circumventing filtering policies.
Browser Proxies
Browser proxies are a more complex version of anonymous proxies that provide the option of selecting different types of encoding to further hide the connection.
SSL Proxies
SSL (or encrypted) proxies form a secure connection (HTTPS) which can only be detected and stopped by recognizing the proxy connection before the three-way handshake is completed and the secure tunnel is formed.
Google Proxies
Google Mobile
Google can be used as a proxy by either choosing the option to translate the website into another language, or show content as it would appear on a mobile device, both of which allow for unrestricted Web browsing that all appears to come from Google and therefore circumvents filtering policies.
Transparent Proxies
Transparent proxies work when a user changes his/her browser settings to search through a proxy. Thousands of free IP addresses are available online and can be easily added to any browser. These IP addresses are constantly changing and therefore very difficult to detect and stop as thousands of new IPs come out daily.
