Archive for the ‘System administration’ Category

ISA Server 2006 as Reverse Web Caching Proxy: Analyze “Object source” and “Cache Info” fields

When publishing content from a web server that is behind a ISA 2006 firewall, the ISA can be configured as Reverse Web Caching proxy, i.e. the ISA caches responses from the web server(s) and sends the cached content to the clients instead of requesting the content from the web servers again (see “Reverse proxy” on […]

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Crashplan 3.8.2010: Fix “CrashPlan PRO Server failed to initialize – error 4001” on Linux

For any reason my Linux CrashPlan PRO Server (version 3.8.2010) crashed. The CrashPlan manager web user interface shows the error CrashPlan PRO Server failed to initialize – error 4001 After restarting the CrashPlan PRO Server the log (/var/log/proserver/com_backup42_app.log.0) shows the following error: […] org.h2.jdbc.JdbcSQLException: File corrupted while reading record: "index not found 286". Possible solution: […]

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IIS 7.5 Application Pools: Understanding default identity “ApplicationPoolIdentity”

In former versions of IIS the default identity for application pools was “NetworkService“. Using this option, the application pool runs under the built-in and low-privileged Windows identity “NETWORKSERVICE“. The disadvantage of this (old default) option is that multiple services using the Windows identity “NETWORKSERVICE” are not isolated from each other, i.e. services could theoretically read, […]

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Microsoft IIS 7: Enable Client Side Browser Caching for static Content in Web.config

To optimize the performance of a web site that is hosted in Microsoft’s Internet Information Server 7 it is reasonable to enable client side browser caching for static content (like for example image files, CSS files or JavaScript files) that probably won’t change in the near feature. You can find more information and best practices […]

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