Getting Started with Citrix ADC
Deploy a Citrix ADC VPX instance
Install a Citrix ADC VPX instance on Microsoft Hyper-V servers
Install a Citrix ADC VPX instance on Linux-KVM platform
Prerequisites for Installing Citrix ADC VPX Virtual Appliances on Linux-KVM Platform
Provisioning the Citrix ADC Virtual Appliance by using OpenStack
Provisioning the Citrix ADC Virtual Appliance by using the Virtual Machine Manager
Configuring Citrix ADC Virtual Appliances to Use SR-IOV Network Interface
Configuring Citrix ADC Virtual Appliances to use PCI Passthrough Network Interface
Provisioning the Citrix ADC Virtual Appliance by using the virsh Program
Provisioning the Citrix ADC Virtual Appliance with SR-IOV, on OpenStack
Configuring a Citrix ADC VPX Instance on KVM to Use OVS DPDK-Based Host Interfaces
Deploy a Citrix ADC VPX instance on Microsoft Azure
Network architecture for Citrix ADC VPX instances on Microsoft Azure
Configure multiple IP addresses for a Citrix ADC VPX standalone instance
Configure a high-availability setup with multiple IP addresses and NICs
Configure a high-availability setup with multiple IP addresses and NICs by using PowerShell commands
Configure HA-INC nodes by using the Citrix high availability template with Azure ILB
Configure address pools (IIP) for a Citrix Gateway appliance
Upgrade and downgrade a Citrix ADC appliance
Authentication, authorization, and auditing application traffic
Configuring authentication, authorization, and auditing policies
Configuring Authentication, authorization, and auditing with commonly used protocols
Use an on-premises Citrix Gateway as the identity provider for Citrix Cloud
Troubleshoot authentication issues in Citrix ADC and Citrix Gateway with aaad.debug module
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Persistence and persistent connections
HTTP cookie persistence
Advanced load balancing settings
Gradually stepping up the load on a new service with virtual server–level slow start
Protect applications on protected servers against traffic surges
Retrieve location details from user IP address using geolocation database
Use source IP address of the client when connecting to the server
Use client source IP address for backend communication in a v4-v6 load balancing configuration
Set a limit on number of requests per connection to the server
Configure automatic state transition based on percentage health of bound services
Use case 2: Configure rule based persistence based on a name-value pair in a TCP byte stream
Use case 3: Configure load balancing in direct server return mode
Use case 6: Configure load balancing in DSR mode for IPv6 networks by using the TOS field
Use case 7: Configure load balancing in DSR mode by using IP Over IP
Use case 10: Load balancing of intrusion detection system servers
Use case 11: Isolating network traffic using listen policies
Use case 12: Configure Citrix Virtual Desktops for load balancing
Use case 13: Configure Citrix Virtual Apps for load balancing
Use case 14: ShareFile wizard for load balancing Citrix ShareFile
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Authentication and authorization
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Configuring a CloudBridge Connector Tunnel between two Datacenters
Configuring CloudBridge Connector between Datacenter and AWS Cloud
Configuring a CloudBridge Connector Tunnel Between a Datacenter and Azure Cloud
Configuring CloudBridge Connector Tunnel between Datacenter and SoftLayer Enterprise Cloud
Configuring a CloudBridge Connector Tunnel Between a Citrix ADC Appliance and Cisco IOS Device
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HTTP cookie persistence
When HTTP cookie persistence is configured, the Citrix ADC appliance sets a cookie in the HTTP headers of the initial client request. The cookie contains the IP address and port of the service selected by the load balancing algorithm. As with any HTTP connection, the client then includes that cookie with any subsequent requests.
When the Citrix ADC appliance detects the cookie, it forwards the request to the service IP and port in the cookie, maintaining persistence for the connection. You can use this type of persistence with virtual servers of type HTTP or HTTPS. This persistence type does not consume any appliance resources and therefore can accommodate an unlimited number of persistent clients.
Note: If the client’s Web browser is configured to refuse cookies, HTTP cookie-based persistence will not work. It might be advisable to configure a cookie check on the Web site, and warn clients that do not appear to be storing cookies properly that they will need to enable cookies for the Web site if they want to use it.
The format of the cookie that the Citrix ADC appliance inserts is:
NSC_XXXX=
where:
- NSC_XXXX is the virtual server ID that is derived from the virtual server name.
- ServiceIP and ServicePort are encoded representations of the service IP address and service port, respectively. The IP address and port are encoded separately.
You can set a time-out value for this type of persistence to specify an inactivity period for the session. When the connection has been inactive for the specified period of time, the Citrix ADC appliance discards the persistence session. Any subsequent connection from the same client results in a new server being selected based on the configured load balancing method, and a new persistence session being established.
Note: If you set the time-out value to 0, the Citrix ADC appliance does not specify an expiration time, but sets a session cookie that is not saved when the client’s browser is shut down.
默认情况下,Citrix ADC设备设置HTTP版本sion 0 cookies for maximum compatibility with client browsers. (Only certain HTTP proxies understand version 1 cookies; most commonly used browsers do not.) You can configure the appliance to set HTTP version 1 cookies, for compliance with RFC2109. For HTTP version 0 cookies, the appliance inserts the cookie expiration date and time as an absolute Coordinated Universal Time (GMT). It calculates this value as the sum of the current GMT time on the appliance and the time-out value. For HTTP version 1 cookies, the appliance inserts a relative expiration time by setting the “Max-Age” attribute of the HTTP cookie. In this case, the client’s browser calculates the actual expiration time.
To configure persistence based on a cookie inserted by the appliance, seeConfiguring Persistence Types That Do Not Require a Rule.
In the HTTP cookie, the appliance by default sets the httponly flag to indicate that the cookie is nonscriptable and should not be revealed to the client application. Therefore, a client-side script cannot access the cookie, and the client is not susceptible to cross-site scripting.
Certain browsers, however, do not support the httponly flag and, therefore, might not return the cookie. As a result, persistence is broken. For browsers that do not support the flag, you can omit the httponly flag in the persistence cookie.
To change the httponly flag setting by using the command line interface
At the command prompt, type:
set lb parameter -httpOnlyCookieFlag (ENABLED | DISABLED) |
Example:
> set lb parameter -httpOnlyCookieFlag disabled Done > show lb parameter Global LB parameters: Persistence Cookie HttpOnly Flag: DISABLED Use port for hash LB: YES Done
To change the httponly flag setting by using the configuration utility
- Navigate to Traffic Management > Load Balancing > Configure Load Balancing Parameters, and select or clear the Persistence Cookie HTTPOnly Flag.
Encrypting the Cookie
From release 10.5 build 55.8, you can encrypt the cookie in addition to any SSL encryption.
To encrypt the cookie by using the command line interface, at the command prompt, type
set lb parameter -UseEncryptedPersistenceCookie ENABLED -cookiePassphrase test
To encrypt the cookie by using the configuration utility
- Navigate toTraffic Management>Change Load Balancing Parameters, and selectEncode Persistence Cookie Valuesand enter a passphrase inCookie Passphrase.
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