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Blue Coat Systems SGOS 4.x manual Redoing an Upgrade from Sgos

Models: SGOS 4.x

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Chapter 2: Upgrade Behavior, General

Redoing an Upgrade from SGOS 3.2.4

When the initial SGOS 4.x upgrade occurs, any compatible configurations are converted. This only happens the first time you upgrade; if you later downgrade to a pre-SGOS 4.x version by selecting an earlier image on your system, make configuration changes, and re-install SGOS 4.x, the new SGOS 3.2.4 changes are not propagated to SGOS 4.x.

To force the new system's configuration to be regenerated after changes are made to the older system's configuration, you will need to force the upgrade conversion to occur again. Use the restore-sgos3-configcommand, which converts the current SGOS 3.x configuration to the SGOS 4.x configuration.

Note: Previous force commands, restore-sgos2-config and restore-cacheos4-config, are not available in SGOS 4.x; they can only be run from earlier versions.

The restore-sgos3-configcommand first checks if there are saved SGOS 3.2.4 settings on the ProxySG. If not, the CLI command warns the administrator and exits.

If saved SGOS 3 settings exist, the restore-sgos3-configcommand warns the administrator that all the current SGOS 4.x settings will be lost and that a restart will be initiated, waiting for positive confirmation before clearing all the current SGOS 4.x settings, and then initiating a restart. The restart (similar to a restart regular) triggers the upgrade process, which copies over the SGOS 3 settings and transforms them to the SGOS 4.x settings.

Redoing an Upgrade from SGOS 2.x or CacheOS 4.x

To downgrade to capture changes to the older version’s configuration, you must first launch the SGOS 3.x image, then select the SGOS 2.x or CacheOS 4.x version to launch. After you make the desired changes, you must follow the upgrade path back to SGOS 3.2.4, using the restore-sgos2-configor restore-cacheos4-configcommands. (See Table 2.1 on page 7 for information on upgrade paths.)

The restore-sgos2-config or restore-cacheos4-config command first checks if there are saved SGOS 2.x or CacheOS 4.x settings on the ProxySG. If not, the CLI command warns the administrator and exits.

Important: Check for deprecation warnings after upgrading to 3.2.4 and before proceeding to SGOS 4.x.

If saved settings exist, the command warns the administrator that all the current next version settings will be lost and that a restart will be initiated, waiting for positive confirmation before clearing all the current next version settings, and then initiates a restart. The restart (similar to a restart regular) triggers the upgrade process, which copies over the settings and transform them to the next version settings.

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Blue Coat Systems SGOS 4.x manual Redoing an Upgrade from Sgos 2.x or CacheOS
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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.