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Getting Started with Citrix NetScaler
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Deploy a Citrix NetScaler VPX instance
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Install a Citrix NetScaler VPX instance on Microsoft Hyper-V servers
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Install a NetScaler VPX instance on Linux-KVM platform
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Prerequisites for Installing NetScaler VPX Virtual Appliances on Linux-KVM Platform
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Provisioning the NetScaler Virtual Appliance by using OpenStack
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Provisioning the NetScaler Virtual Appliance by using the Virtual Machine Manager
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Configuring NetScaler Virtual Appliances to Use SR-IOV Network Interface
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Configuring NetScaler Virtual Appliances to use PCI Passthrough Network Interface
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Provisioning the NetScaler Virtual Appliance by using the virsh Program
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Deploying NetScaler VPX Instances on AWS
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Upgrade and downgrade a NetScaler appliance
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Overriding Static Proximity Behavior by Configuring Preferred Locations
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Example of a Complete Parent-Child Configuration Using the Metrics Exchange Protocol
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Configuring Global Server Load Balancing for DNS Queries with NAPTR records
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Using the EDNS0 Client Subnet Option for Global Server Load Balancing
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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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Use source IP address of the client when connecting to the server
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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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SSL service monitoring
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Monitor accounting information delivery from a RADIUS server
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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 14: ShareFile wizard for load balancing Citrix ShareFile
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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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SSL service monitoring
The NetScaler appliance has built-in secure monitors, TCPS and HTTPS. You can use the secure monitors to monitor HTTP as well as non-HTTP traffic. To configure a secure HTTP monitor, select the monitor type as HTTP, and then set the secure flag. To configure a secure TCP monitor, select the monitor type as TCP, and then set the secure flag.The secure monitors work as described below:
- Secure TCP monitoring. The NetScaler appliance establishes a TCP connection. After the connection is established, the appliance performs an SSL handshake with the server. After the handshake is over, the appliance closes the connection.
- Secure HTTP monitoring. The NetScaler appliance establishes a TCP connection. After the connection is established, the appliance performs an SSL handshake with the server. When the SSL connection is established, the appliance sends HTTP requests over the encrypted channel and checks the response codes.
The following table describes the available built-in monitors for monitoring SSL services.
Monitor type | Probe | Success criteria (Direct condition) |
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TCP | TCP connection; SSL handshake | Successful TCP connection established and successful SSL handshake. |
HTTP | TCP connection; SSL handshake; Encrypted HTTP request | Successful TCP connection is established, successful SSL handshake is performed, and expected HTTP response code in server HTTP response is encrypted. |
TCP-ECV | TCP connection; SSL handshake (Data sent to a server is encrypted.) | Successful TCP connection is established, successful SSL handshake is performed, and expected TCP data is received from the server. |
HTTP-ECV | TCP connection; SSL handshake (Encrypted HTTP request) | Successful TCP connection is established, successful SSL handshake is performed, and expected HTTP data is received from the server. |
Sample configuration for HTTPS-ECV health check monitor
HTTP services have predefined monitors capable of Extended Content Verification (ECV). These monitors are used when a validation is required beyond a successful TCP connection. These monitors validate the service as UP, when all the following criteria are met:
- A successful TCP connection.
- A particular type of request must be generated.
- A specific message is expected in reply from the Receive String.
For these monitors, a request string is configured along with a reply string. If the reply string received by the NetScaler monitor matches the configured string, then the service is marked UP.
Bind a monitor to a service by using the GUI
- Navigate to Traffic Management > Load Balancing > Services, create a service, and specify the protocol as SSL. Click OK.
- Click in the Service to Load Balancing Monitor Binding pane, and click Add Binding.
- Choose the monitor type as HTTPS-ECV and click Edit.
- In the Configure Monitor pane under Basic Parameters tab, enter values for the following parameters:
- Send String – The string that the monitor must send to the service.
- Receive String – The string that the monitor must receive to mark the service as UP.
- Click OK to complete the monitor configuration.
- Click Select.
- Click Bind to bind the HTTPS-ECV monitor to the service.
- Click Close.
Note
Prior to NetScaler release 12.0 build 56.20, Basic Parameters and Advanced Parameters are named Standard Parameters and Special Parameters respectively.
Bind a monitor to a service by using the CLI
At the command prompt, type:
bind service <servicename> -monitorName https-ecv
Example:
bind services1 -monitorName https-ecv
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