Getting Started with Citrix ADC
Deploy a Citrix ADC VPX instance
Optimize Citrix ADC VPX performance on VMware ESX, Linux KVM, and Citrix Hypervisors
Apply Citrix ADC VPX configurations at the first boot of the Citrix ADC appliance in cloud
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
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 AWS
Deploy a VPX high-availability pair with elastic IP addresses across different AWS zones
Deploy a VPX high-availability pair with private IP addresses across different AWS zones
Configure a Citrix ADC VPX instance to use SR-IOV network interface
Configure a Citrix ADC VPX instance to use Enhanced Networking with AWS ENA
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 a Citrix ADC VPX instance to use Azure accelerated networking
Configure HA-INC nodes by using the Citrix high availability template with Azure ILB
Configure a high-availability setup with Azure external and internal load balancers simultaneously
Configure address pools (IIP) for a Citrix Gateway appliance
Upgrade and downgrade a Citrix ADC appliance
Solutions for Telecom Service Providers
Load Balance Control-Plane Traffic that is based on Diameter, SIP, and SMPP Protocols
提供DNS基础设施/交通服务,等as, Load Balancing, Caching, and Logging for Telecom Service Providers
Provide Subscriber Load Distribution Using GSLB Across Core-Networks of a Telecom Service Provider
Authentication, authorization, and auditing application traffic
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Persistence and persistent connections
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 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 14: ShareFile wizard for load balancing Citrix ShareFile
Use case 15: Configure layer 4 load balancing on the Citrix ADC appliance
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Client Keep-Alive
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Authentication and authorization for System Users
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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
CloudBridge Connector Tunnel Diagnostics and Troubleshooting
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同步hronizing Configuration Files in a High Availability Setup
Restricting High-Availability Synchronization Traffic to a VLAN
Understanding the High Availability Health Check Computation
Managing High Availability Heartbeat Messages on a Citrix ADC Appliance
Remove and Replace a Citrix ADC in a High Availability Setup
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Client keep-alive
The client keep-alive feature enables multiple clients requests to be sent on a single connection. This feature benefits transaction management. When the Client Keep-Alive mode is enabled on an appliance and the server response to the client request contains the Connection: close the HTTP header and performs the following tasks:
Renames the existing Connection header name by shuffling the characters in the header name.
Adds a new Connection: header with Keep-Alive as the value for the header.
The Client Keep-Alive mode enables the Citrix ADC appliance to process multiple requests and responses using the same socket connection. The feature keeps the connection between the client and the appliance (client-side connection) open even after the server closes the connection with the appliance. This allows multiple clients requests using a single connection and saves the round trips associated in opening and closing a connection. Client keep-alive is most beneficial in SSL sessions.
Client keep-alive is useful for the following scenarios:
- If the server does not support the client keep-alive.
- If the server supports but an application on the server does not support the client keep-alive.
Note:Client keep-alive is applicable for HTTP and SSL traffic. Client-keep alive can be configured globally to handle all traffic. Also, you can activate it on specific services.
In the client keep-alive environment, the configured services intercept the client traffic and the client request is directed to the origin server. The server sends the response and closes the connection between the server and the appliance. If a “Connection: Close” header is present in the server response, the appliance corrupts this header in the client-side response, and the client-side connection is kept open. As a result, the client does not have to open a new connection for the next request. Instead, the connection to the server is reopened.
Note:If a server sends back two “Connection: Close” headers, only one is edited. This results in significant delays on the client rendering of the object because a client does not assume that the object has been delivered completely until the connection is closed.
Configure client keep-alive
Client keep-alive, by default, is disabled on the Citrix ADC, both globally and at service level. Therefore, you must enable the feature at the required scope.
Note:If you enable the client keep-alive globally, it is enabled for all services, regardless of whether you enable it at the service level. Also, you must configure some HTTP parameters to specify the following:
the maximum number of HTTP connections retained in the connection reuse pool.
enable connection multiplexing, and enable persistence
Etag
.Note:When Persistent
ETag
is enabled, theETag
header includes information about the server that served the content. This ensures that cache validation conditional requests or browser requests, for that content, always reaches the same server.
Configure client keep-alive by using Citrix ADC command interface
At the command prompt, do the following:
Enable client keep-alive on the Citrix ADC.
- At global level -
enable ns mode cka
- At service level -
set service
-CKA YES
Note:
Client keep-alive can be enabled only for HTTP and SSL services.
- At global level -
Configure HTTP parameters on the HTTP profile that is bound to one or more services.
set ns httpProfile
-maxReusePool -conMultiplex ENABLED -persistentETag ENABLED
Note:
Configure these parameters on the
nshttp_default _profile HTTP
profile, to make them available globally.
Configure client keep-alive by using Citrix ADC GUI
Enable client keep-alive on the Citrix ADC.
At global level
Navigate toSystem>Settings, clickConfigure Modesand selectClient side Keep Alive.
At service level
Navigate toTraffic Management>Load Balancing>Services, and select the required service. In theSettingssection, selectClient Keep-Alivecheck box.
Configure the required HTTP parameters on the HTTP profile that is bound to one or more services.
Navigate toSystem>Profiles, and onHTTP Profilestab, select the required profile and update the required HTTP parameters.
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