Blue Coat SGOS 4.x Upgrade Guide

Table 3.2: New Substitutions

(Continued)

 

 

 

 

ELFF

CPL

Description

 

 

 

x-exception-category

$(exception.category_

An HTML-formatted message suitable for

-review-message

review_message)

inclusion in an exception page. The values are

 

 

empty if the selected content filter provider

 

 

does not support review messages, or if the

 

 

provider was not consulted for categorization,

 

 

or if the categorization process failed due to an

 

 

error.

 

 

 

x-p2p-client-type

$(p2p.client)

The name of the P2P network the client

 

 

application is connected to. In case of non-P2P

 

 

traffic, this substitution variable does not have

 

 

a value.

 

 

 

x-cs-netbios-

$(netbios.computer-

The NetBIOS name of the computer. This is an

computer-name

name)

empty string if the query fails or the name is

 

 

not reported.

x-cs-netbios-

$(netbios.computer-

The name of the domain to which the

computer-domain

domain)

computer belongs. This is an empty string if

 

 

the query fails or the name is not reported.

 

 

 

x-cs-netbios-

$(netbios.messenger-

The name of the logged-in user. This is an

messenger-username

username)

empty string if the query fails or the name is

 

 

not reported. It is also empty if there is more

 

 

than one logged-in user.

 

 

 

x-cs-netbios-

$(netbios.messenger-

A comma-separated list of the all the

messenger-usernames

usernames)

messenger usernames reported by the target

 

 

computer. This is an empty string if the query

 

 

fails, or no names are reported.

 

 

 

x-cs-socks-

 

Compresses data on the client connection.

compression

 

 

x-sr-socks-

 

Compresses data on the server connection.

compression

 

 

x-virus-details

$(icap_virus_details)

Details of a virus if one was detected.

x-icap-error-code

$(icap_error_code)

ICAP error code.

x-icap-error-details

$(icap_error_details)

ICAP error details.

cs(Content-Encoding)

$(request.header.

Client Response header: Content-Encoding.

 

Content-Encoding)

This substitution allows you to monitor the

 

 

effect of the new HTTP compression features.

rs(Accept-Encoding)

$(response.header.

Server Request header: Accept-Encoding

 

Accept-Encoding)

This substitution allows you to monitor the

 

 

effect of the new HTTP compression features.

A new substitution modifier—label(N)—has been added. It is used in conjunction with the client.host substitution variable in defining Policy Substitution Realms. For example, $(client.host:label(2)) could be used in the definition of a Policy Substitution Realm to set the user name from the results of a reverse DNS Lookup. For more information on the :label( ) modifier, refer to Appendix D “Substitutions,” in the Blue Coat Content Policy Language Guide.

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Blue Coat Systems SGOS 4.x manual Blue Coat Sgos 4.x Upgrade Guide New Substitutions
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SGOS 4.x specifications

Blue Coat Systems SGOS 4.x is a robust operating system designed for the Blue Coat ProxySG series of appliances, which serve as content filtering and web security solutions. The SGOS (Secure Gateway Operating System) is crafted to enhance network performance while providing extensive security and policy enforcement capabilities. This article delves into the numerous features, technologies, and characteristics that define SGOS 4.x, making it an essential tool for organizations looking to fortify their web traffic management and security.

One of the standout features of SGOS 4.x is its advanced web filtering capabilities. The system employs a comprehensive URL categorization database that allows organizations to enforce content policies effectively. By categorizing millions of web pages, SGOS enables users to block or allow access to specific sites based on their content category, ensuring a safe browsing experience for employees and preventing access to harmful or non-work-related content.

Another notable technological characteristic of SGOS 4.x is its accelerated SSL decryption. As encrypted traffic continues to dominate the web, it becomes increasingly important for organizations to inspect this traffic for potential threats. SGOS 4.x offers robust SSL decryption capabilities that allow organizations to analyze encrypted traffic while maintaining the confidentiality and integrity of the data being transmitted. This attribute not only strengthens security but also aids in compliance with regulatory requirements.

SGOS 4.x is also equipped with exceptional caching and content delivery features. By caching frequently accessed content, the system reduces load times and optimizes bandwidth usage. This caching mechanism is enhanced by predefined policies that dictate how content is stored and retrieved, significantly improving user experience while reducing operational costs.

Furthermore, SGOS 4.x supports advanced reporting and analytics features. The integrated reporting tools provide administrators with insights into web usage patterns, bandwidth consumption, and security incidents. These insights facilitate informed decision-making and allow organizations to refine their web usage policies based on actual user behavior and threat landscape analysis.

In terms of scalability, SGOS 4.x is engineered to support a wide range of deployment scenarios, from small businesses to large enterprises. The architecture is designed to efficiently handle varying volumes of traffic without compromising performance or security, making it a flexible solution for diverse organizational needs.

Overall, Blue Coat Systems SGOS 4.x presents a powerful platform for web security and traffic management. With its advanced filtering, SSL decryption, caching, and analytics capabilities, SGOS 4.x remains a vital solution for organizations aiming to enhance their security posture and improve operational efficiency in an increasingly complex web environment.
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