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Getting Started with NetScaler
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Solutions for Telecom Service Providers
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Load Balance Control-Plane Traffic that is based on Diameter, SIP, and SMPP Protocols
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Provide Subscriber Load Distribution Using GSLB Across Core-Networks of a Telecom Service Provider
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Authentication, authorization, and auditing application traffic
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Basic components of authentication, authorization, and auditing configuration
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Web Application Firewall protection for VPN virtual servers and authentication virtual servers
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On-premises NetScaler Gateway as an identity provider to Citrix Cloud™
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Authentication, authorization, and auditing configuration for commonly used protocols
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Troubleshoot authentication and authorization related issues
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Troubleshoot authentication, authorization and auditing issues
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Configure EULA as an authentication factor in NetScaler nFactor system
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Configure periodic Endpoint Analysis scan as a factor in nFactor authentication
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Configure post-authentication Endpoint Analysis scan as a factor in NetScaler nFactor authentication
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Configure pre-authentication Endpoint Analysis scan as a factor in nFactor authentication
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Configure pre-auth and post-auth EPA scan as a factor in nFactor authentication
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Configure prefill user name from certificate in NetScaler nFactor authentication
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Localize error messages generated by NetScaler nFactor system
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Configure NetScaler Gateway preauthentication EPA scan for the domain check
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Persistence and persistent connections
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Advanced load balancing settings
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Gradually stepping up the load on a new service with virtual server–level slow start
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Protect applications on protected servers against traffic surges
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Retrieve location details from user IP address using geolocation database
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Use source IP address of the client when connecting to the server
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Use client source IP address for backend communication in a v4-v6 load balancing configuration
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Set a limit on number of requests per connection to the server
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Configure automatic state transition based on percentage health of bound services
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Use case 2: Configure rule based persistence based on a name-value pair in a TCP byte stream
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Use case 3: Configure load balancing in direct server return mode
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Use case 6: Configure load balancing in DSR mode for IPv6 networks by using the TOS field
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Use case 7: Configure load balancing in DSR mode by using IP Over IP
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Use case 10: Load balancing of intrusion detection system servers
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Use case 11: Isolating network traffic using listen policies
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Use case 12: Configure Citrix Virtual Desktops for load balancing
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Use case 13: Configure Citrix Virtual Apps and Desktops for load balancing
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Use case 14: ShareFile wizard for load balancing Citrix ShareFile
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Use case 15: Configure layer 4 load balancing on the NetScaler appliance
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Create a certificate signing request and use SSL certificates on a NetScaler appliance
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Configure SSL acceleration with HTTP on the front end and SSL on the back end
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Export certificates used on a NetScaler appliance as PFX file
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Configure SSL monitoring when client authentication is enabled on the back-end service
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Configure SSL action to forward client traffic if a cipher is not supported on the ADC
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Configure synchronization of files in a high availability setup
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Authentication and authorization for System Users
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Configuring a CloudBridge Connector Tunnel between two Datacenters
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Configuring CloudBridge Connector between Datacenter and AWS Cloud
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Configuring a CloudBridge Connector Tunnel Between a Datacenter and Azure Cloud
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Configuring CloudBridge Connector Tunnel between Datacenter and SoftLayer Enterprise Cloud
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Configuring a CloudBridge Connector Tunnel Between a NetScaler Appliance and Cisco IOS Device
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CloudBridge Connector Tunnel Diagnostics and Troubleshooting
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Synchronization across cluster nodes
All configurations on a NetScaler cluster are performed on the cluster IP address, which is the management address of the cluster. The cluster node owns the cluster IP address that is referred to as the cluster configuration coordinator (CCO) as shown in the following figure:
The configurations that are available on the CCO are automatically propagated to the other cluster nodes and therefore all cluster nodes have the same configurations.
- NetScaler allows only a few configurations to be performed on individual cluster nodes through their NSIP address. In these cases, you must ensure configuration consistency manually across all nodes in the cluster. These configurations are not propagated across the other cluster nodes. For more information on operations supported on each cluster node, see Operations Supported on Individual Cluster Nodes.
- The following commands when ran on the cluster IP address are not propagated to other cluster nodes:
- shutdown. Shuts down only the configuration coordinator.
- reboot. Reboots only the configuration coordinator.
- rm cluster instance. Removes the cluster instance from the node that you are running the command on.
- For a command to propagate to other cluster nodes:
- The quorum must be configured on the cluster instance.
- Most the cluster quorum with (n/2 + 1) of the cluster nodes must be active for the cluster to be operational.
- A cluster can run with a minimum number of nodes when the majority rule (n/2 + 1) is relaxed.
When a node is added to a cluster, the configurations and the files (SSL certificates, licenses, DNS, and so on) that are available on the CCO are synchronized to the newly added cluster node. When an existing cluster node, that was intentionally disabled or that had failed, is once again added, the cluster compares the configurations available on the node with the configurations available on the CCO. If there is a mismatch in configurations, the node is synchronized by using one of the following:
- Full synchronization. If the difference between configurations exceeds 255 commands, all the configurations of the CCO are applied to the node that is rejoining the cluster. The node remains operationally unavailable during the synchronization.
- Incremental Synchronization. If the difference between configurations is less than or equal to 255 commands, only the configurations that are not available are applied to the node that is rejoining the cluster. The operational state of the node remains unaffected.
Note
You can also manually synchronize the configurations and files. For more information, seeSynchronizing Cluster Configurations and Synchronizing Cluster Files.
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