NetScaler Integrated Caching

Citrix NetScaler comes with a caching feature named Integrated Caching which can cache frequently accessed data to take the stress off backend servers and deliver content to users faster by elminating trips to backend servers.

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Citrix Command Center service fails to start

Windows could not start the Citrix Command Center service on Local Computer. Error 1067: The process terminated unexpectedly.

Error occured during initialization of VM. NoClassDefFoundError. These are some of the messages being shown randomly when I noticed Command Center was offline and I tried to start the service.

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NetScaler Compression

NetScaler can perform compression on data to reduce the size of the data in transit without any loss to that data. Compression advantages include reduced bandwidth, reduced stress on backend web servers and the quicker serving of content to users.

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NetScaler 401 Unauthorized Access

Error: 401 – Unauthorized: Access is denied due to invalid credentials. This error was appearing after authenticating to NetScaler Gateway just as users were being passed through to Citrix Web Interface v5.4.

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Citrix NetScaler traffic capture using nstrace and nstcpdump

Nstrace

Nstrace is a NetScaler packet capture tool. Nstrace dumps packets in the native NetScaler format. These trace files have an extension of .cap and can be analysed with WireShark. You can use specific filters in WireShark as normal to filter through captured data or specify filters using the NetScaler CLI. This allows you to only capture traffic of interest.

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