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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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Configuring Basic Content Switching
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Customizing the Basic Content Switching Configuration
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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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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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Customizing the basic content switching configuration
After you configure a basic content switching setup, you might need to customize it to meet your requirements. If your web servers are UNIX-based and rely on case sensitive pathnames, you can configure case sensitivity for policy evaluation. You can also set precedence for evaluation of the content switching policies that you configured. You can configure HTTP and SSL content switching virtual servers to listen on multiple ports instead of creating separate virtual servers. If you want to configure content switching for a specific a virtual LAN, you can configure a content switching virtual server with a listen policy.
Configuring case sensitivity for policy evaluation
You can configure the content switching virtual server to treat URLs as case sensitive in URL-based policies. When case sensitivity is configured, the NetScaler appliance considers case when evaluating policies. For example, if case sensitivity is off, the URLs /a/1.htm and /A/1.HTM are treated as identical. If case sensitivity is on, those URLs are treated as separate and can be switched to different targets.
To configure case sensitivity by using the command line interface
At the command prompt, type:
set cs vserver \<name\> -caseSensitive (ON|OFF)
Example:
set cs vserver Vserver-CS-1 -caseSensitive ON
To configure case sensitivity by using the configuration utility
- Navigate to Traffic Management > Content Switching > Virtual Servers, and open a virtual server.
- In Advanced Settings, select Traffic Settings, and then select Case Sensitive.
Setting the precedence for policy evaluation
Precedence refers to the order in which policies that are bound to a virtual server are evaluated. You do not normally have to configure precedence: the default precedence works correctly in many cases. If you want to make sure that one policy or set of policies is applied first, however, and another policy or set of policies is applied only if the first set does not match a request, you can configure either URL-based precedence or rule-based precedence.
Precedence with URL-Based policies
If there are multiple matching URLs for the incoming request, the precedence (priority) for URL-based policies is:
- Domain and exact URL
- Domain, prefix, and suffix
- Domain and suffix
- Domain and prefix
- Domain only
- Exact URL
- Prefix and suffix
- Suffix only
- Prefix only
- Default
If you configure precedence based on URL, the request URL is compared to the configured URLs. If none of the configured URLs match the request URL, then rule-based policies are checked. If the request URL does not match any rule-based policies, or if the content group selected for the request is down, then the request is processed as follows:
- If you configure a default group for the content switching virtual server, then the request is forwarded to the default group.
- If the configured default group is down or if no default group is configured, then an “HTTP 404 Not Found” error message is sent to the client.
Note
You should configure URL-based precedence if the content type (for example, images) is the same for all clients. However, if different types of content must be served based on client attributes (such as Accept-Language), you must use rule-based precedence.
Precedence with Rule-Based policies
If you configure precedence based on rules, which is the default setting, the request is tested on the basis of the rule-based policies you have configured. If the request does not match any rule-based policies, or if the content group selected for the incoming request is down, the request is processed in the following manner:
- If a default group is configured for the content switching virtual server, the request is forwarded to the default group.
- If the configured default group is down or if no default group is configured, an “HTTP 404 Not Found” error message is sent to the client.
To configure precedence by using the command line interface
At the command prompt, type:
set cs vserver \<name\> -precedence ( RULE | URL )
Example:
set cs vserver Vserver-CS-1 -precedence RULE
To configure precedence by using the configuration utility
- Navigate to Traffic Management > Content Switching > Virtual Servers, and open a virtual server.
- In Advanced Settings, select Traffic Settings, and then specify Precedence.
Support for multiple ports for HTTP and SSL type content switching virtual servers
You can configure the NetScaler appliance so that HTTP and SSL content switching virtual servers listen on multiple ports, without having to configure separate virtual servers. This feature is especially useful if you want to base a content switching decision on a part of the URL and other L7 parameters. Instead of configuring multiple virtual servers with the same IP address and different ports, you can configure one IP address and specify the port as *. As a result, the configuration size is also reduced.
To configure an HTTP or SSL content switching virtual server to listen on multiple ports by using the command line
At the command prompt, type:
add cs vserver <name> <serviceType> <IPAddress> Port *
Example
> add cs vserver cs1 HTTP 10.102.92.215 *
Done
> sh cs vserver cs1
cs1 (10.102.92.215:*) - HTTP Type: CONTENT
State: UP
Last state change was at Tue May 20 01:15:49 2014
Time since last state change: 0 days, 00:00:03.270
Client Idle Timeout: 180 sec
Down state flush: ENABLED
Disable Primary Vserver On Down : DISABLED
Appflow logging: ENABLED
Port Rewrite : DISABLED
State Update: DISABLED
Default: Content Precedence: RULE
Vserver IP and Port insertion: OFF
L2Conn: OFF Case Sensitivity: ON
Authentication: OFF
401 Based Authentication: OFF
Push: DISABLED Push VServer:
Push Label Rule: none
IcmpResponse: PASSIVE
RHIstate: PASSIVE
TD: 0
Done
To configure an HTTP or SSL content switching virtual server to listen on multiple ports by using the configuration utility
- Navigate to Traffic Management > Content Switching > Virtual Servers, and create a virtual server of type HTTP or SSL.
- Use an asterisk (*) to specify the port.
Configuring per-VLAN Wildcarded virtual servers
If you want to configure content switching for traffic on a specific virtual local area network (VLAN), you can create a wildcarded virtual server with a listen policy that restricts it to processing traffic only on the specified VLAN.
To configure a wildcarded virtual server that listens to a specific VLAN by using the command line interface
At the command prompt, type:
- add cs vserver <name> <serviceType> IPAddress
* Port *
-listenpolicy <expression> [-listenpriority <positive_integer>]
Example:
add cs vserver Vserver-CS-vlan1 ANY * *
-listenpolicy "CLIENT.VLAN.ID.EQ(2)" -listenpriority 10
To configure a wildcarded virtual server that listens to a specific VLAN by using the configuration utility
Navigate to Traffic Management > Content Switching > Virtual Servers, and configure a virtual server. Specify a listen policy that restricts it to processing traffic only on the specified VLAN.
After you have created this virtual server, you bind it to one or more services as described in Binding Services to the Virtual Server.
Configuring the Microsoft SQL server version setting
You can specify the version of Microsoft® SQL Server® for a content switching virtual server that is of type MSSQL. The version setting is recommended if you expect some clients to not be running the same version as your Microsoft SQL Server product. The version setting provides compatibility between the client-side and server-side connections by ensuring that all communication conforms to the server’s version.
To set the Microsoft SQL Server version parameter by using the command line interface
At the command prompt, type the following commands to set the Microsoft SQL Server version parameter for a content switching virtual server and verify the configuration:
set cs vserver \<name\> -mssqlServerVersion \<mssqlServerVersion\>
show cs vserver \<name\>
Example
> set cs vserver myMSSQLcsvip -mssqlServerVersion 2008R2 Done > show cs vserver myMSSQLcsvip myMSSQLcsvip (192.0.2.13:1433) - MSSQL Type: CONTENT State: UP . . . . . . MSsql Server Version: 2008R2 . . . . . . Done >
To set the Microsoft SQL server version parameter by using the configuration utility
- Navigate to Traffic Management > Content Switching > Virtual Servers, configure a virtual server and specify the protocol as MYSQL.
- In Advanced Settings, select MySQL, and specify the Server Version.
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