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Getting Started with Citrix ADC
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Deploy a Citrix ADC VPX instance
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Apply Citrix ADC VPX configurations at the first boot of the Citrix ADC appliance in cloud
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Install a Citrix ADC VPX instance on Microsoft Hyper-V servers
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Install a Citrix ADC VPX instance on Linux-KVM platform
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Prerequisites for Installing Citrix ADC VPX Virtual Appliances on Linux-KVM Platform
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Provisioning the Citrix ADC Virtual Appliance by using OpenStack
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Provisioning the Citrix ADC Virtual Appliance by using the Virtual Machine Manager
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Configuring Citrix ADC Virtual Appliances to Use SR-IOV Network Interface
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Configuring Citrix ADC Virtual Appliances to use PCI Passthrough Network Interface
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Provisioning the Citrix ADC Virtual Appliance by using the virsh Program
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Provisioning the Citrix ADC Virtual Appliance with SR-IOV, on OpenStack
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Configuring a Citrix ADC VPX Instance on KVM to Use OVS DPDK-Based Host Interfaces
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Deploy a Citrix ADC VPX instance on AWS
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Deploy a VPX high-availability pair with elastic IP addresses across different AWS zones
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Deploy a VPX high-availability pair with private IP addresses across different AWS zones
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Configure a Citrix ADC VPX instance to use SR-IOV network interface
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Configure a Citrix ADC VPX instance to use Enhanced Networking with AWS ENA
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Deploy a Citrix ADC VPX instance on Microsoft Azure
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Network architecture for Citrix ADC VPX instances on Microsoft Azure
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Configure multiple IP addresses for a Citrix ADC VPX standalone instance
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Configure a high-availability setup with multiple IP addresses and NICs
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Configure a high-availability setup with multiple IP addresses and NICs by using PowerShell commands
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Configure a Citrix ADC VPX instance to use Azure accelerated networking
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Configure HA-INC nodes by using the Citrix high availability template with Azure ILB
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Configure address pools (IIP) for a Citrix Gateway appliance
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Upgrade and downgrade a Citrix ADC appliance
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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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On-premises Citrix 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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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 14: ShareFile wizard for load balancing Citrix ShareFile
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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 Citrix ADC Appliance and Cisco IOS Device
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CloudBridge Connector Tunnel Diagnostics and Troubleshooting
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Synchronizing Configuration Files in a High Availability Setup
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Restricting High-Availability Synchronization Traffic to a VLAN
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Understanding the High Availability Health Check Computation
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Managing High Availability Heartbeat Messages on a Citrix ADC Appliance
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Remove and Replace a Citrix ADC in a High Availability Setup
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Enforce HTTP RFC compliance
Citrix Web App Firewall inspects the incoming traffic for HTTP RFC compliance and drops any request that has RFC violations by default. However, there are certain scenarios, where the appliance might have to bypass or block a non-RFC compliance request. In such cases, you can configure the appliance to bypass or block such requests at global or profile level.
Block or bypass non-RFC compliant requests at global level
The HTTP module tags a request as invalid if it is incomplete or invalid and such requests cannot be processed by WAF. For example, an incoming HTTP request having host header missing. To block or bypass such invalid requests, you must configure the “malformedReqAction” option in the application firewall global settings.
Note:
If you disable the “block” option in the “malformedReqAction” parameter, the appliance bypasses the entire app firewall processing for all non-RFC compliance requests and forwards the requests to the next module.
To block or bypass invalid non-RFC compliant HTTP requests by using the command line interface
To block or bypass invalid requests, enter the following command:
set appfw settings -malformedreqaction <action>
Example:
set appfw settings –malformedReqAction block
To display malformed request action settings
To display malformed request action settings, enter the following command:
show appfw settings
Output:
DefaultProfile: APPFW_BYPASS UndefAction: APPFW_BLOCK SessionTimeout: 900 LearnRateLimit: 400 SessionLifetime: 0 SessionCookieName: citrix_ns_id ImportSizeLimit: 134217728 SignatureAutoUpdate: OFF SignatureUrl:"https://s3.amazonaws.com/NSAppFwSignatures/SignaturesMapping.xml" CookiePostEncryptPrefix: ENC GeoLocationLogging: OFF CEFLogging: OFF EntityDecoding: OFF UseConfigurableSecretKey: OFF SessionLimit: 100000 MalformedReqAction: block log stats
Done
To block or bypass invalid non-RFC compliant HTTP requests by using the Citrix ADC GUI
- Navigate to Security > Citrix Web App Firewall.
- In the Citrix Web App Firewall page, click Change Engine Settings under Settings.
- In the Configure Citrix Web App Firewall Settings page, select the Log Malformed Request option as Block, Log or Stats.
- Click OK and Close.
Note:
If you unselect the “block” action or do not select any malformed request action, the appliance bypasses the request without intimating the user.
Block or bypass non-RFC compliant requests at profile level
Other non-RFC compliant requests can be configured to block or bypass at profile level. You must set the RFC profile either in “Block” or “Bypass” mode. By doing this, any invalid traffic that matches the Web App Firewall profile is either bypassed or blocked accordingly.
Note:
When you set the RFC profile in “Bypass” mode, you must make sure you disable the transformation option in the “HTML Cross-Site Scripting Settings” and in the “HTML SQL Injection Settings” sections. If you enable the option and set the rfc profile in “Bypass” mode, the appliance displays a warning message, “Transform cross-site scripts” and “Transform SQL special characters” are both currently ON. Recommend to turn it off when used with APPFW_RFC_BYPASS”.
Important:
Also, the appliance displays a warning note, “Appfw Security checks enabled might not be applicable to requests which violates RFC checks when this profile is set. Enabling any transformation setting is not recommended as requests might be partially transformed that contains RFC violations.”
To configure RFC profile in the Web App Firewall profile by using the command line interface
At the command prompt, type the following commands:
set appfw profile <profile_name> -rfcprofile <rfcprofile_name
Example
set appfw profile P1 -rfcprofile APPFW_RFC_BLOCK
Note:
By default, the rfc profile is bound to the Web App Firewall profile in “Block” mode.
To configure RFC profile in the Web App Firewall profile by using the GUI
- Navigate to Security > Citrix Web App Firewall > Profiles.
- In the Profiles page, select a profile and click Edit.
- In the Web App Firewall Profile page, click Profile settings from Advanced Settings section.
- In the HTTP Settings section, set the RFC profile in APPFW_RFC_BYPASS mode. The system displays a warning message, “Appfw Security checks enabled might not be applicable to requests which violates RFC checks when this profile is set. Enabling any transformation setting is not recommended as requests might be partially transformed that contains RFC violations”.
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