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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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Configure a classic expression
Classic expressions consist of the following expression elements, listed in hierarchical order:
- Flow Type. Specifies whether the connection is incoming or outgoing. The flow type is REQ for incoming connections and RES for outgoing connections.
- Protocol. Specifies the protocol, the choices for which are HTTP, SSL, TCP, and IP.
- Qualifier. The protocol attribute, which depends on the selected protocol.
- Operator. The type of test you want to perform on the connection data. Your choice of operator depends upon the connection information you are testing. If the connection information you are testing is text, you use text operators. If it is a number, you use standard numeric operators.
- Value. The string or number against which the connection data element—defined by the flow type, protocol, and qualifier—is tested. The value can be either a literal or an expression. The literal or expression must match the data type of the connection data element.
In a policy, classic expressions can be combined to create more complex expressions using Boolean and comparative operators.
Expression elements are parsed from left to right. The leftmost element is either REQ or RES and designates a request or a response, respectively. Successive terms define a specific connection type and a specific attribute for that connection type. Each term is separated from any preceding or following term by a period. Arguments appear in parentheses and follow the expression element to which they are passed.
The following classic expression fragment returns the client source IP for an incoming connection.
REQ.IP.SOURCEIP
The example identifies an IP address in a request. The expression element SOURCEIP designates the source IP address. This expression fragment may not be useful by itself. You can use an additional expression element, an operator, to determine whether the returned value meets specific criteria. The following expression tests whether the client IP is in the subnet 200.0.0.0/8 and returns a Boolean TRUE or FALSE:
REQ.IP.SOURCEIP == 200.0.0.0 -netmask 255.0.0.0
Create a classic policy expression by using the CLI
At the command prompt, type the following commands to set the parameters and verify the configuration:
- set appfw policy \<name\> -rule \<expression\> -action \<action\>
- show appfw policy \<name\>
Example
> set appfw policy GenericApplicationSSL_ 'HTTP.REQ.METHOD.EQ("get")' APPFW_DROP
Done
> show appfw policy GenericApplicationSSL_
Name: GenericApplicationSSL_ Rule: HTTP.REQ.METHOD.EQ("get")
Profile: APPFW_DROP Hits: 0
Undef Hits: 0
Policy is bound to following entities
1) REQ VSERVER app_u_GenericApplicationSSLPortalPages PRIORITY : 100
Done
Add an expression for a classic policy by using the GUI
This procedure documents the Add Expression dialog box. Depending on the feature for which you are configuring a policy, the route by which you arrive at this dialog box may be different.
- Perform steps 1-4 in “To create a policy with classic expressions by using the GUI”.
- In the Add Expression dialog box, in Expression Type, click the type of expression you want to create.
- Under Flow Type, click the down arrow and choose a flow type.
The flow type is typically REQ or RES. The REQ option specifies that the policy applies to all incoming connections or requests. The RES option applies the policy to all outgoing connections or responses.
For Application Firewall policies, you should leave the expression type set to General Expression, and the flow type set to REQ. The Application Firewall treats each request and response as a single paired entity, so all Application Firewall policies begin with REQ.
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Under Protocol, click the down arrow and choose the protocol you want for your policy expression. Your choices are:
- HTTP. Evaluates HTTP requests that are sent to a Web server. For classic expressions, HTTP includes HTTPS requests.
- SSL. Evaluates SSL data associated with the current connection.
- TCP. Evaluates the TCP data associated with the current connection.
- IP. Evaluates the IP addresses associated with the current connection.
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Under Qualifier, click the down arrow and choose a qualifier for your policy. The qualifier defines the type of data to be evaluated. The list of qualifiers that appears depends on which protocol you selected in step 4. The following choices appear for the HTTP protocol:
- METHOD. Filters HTTP requests that use a particular HTTP method.
- URL. Filters HTTP requests for a specific Web page.
- URLQUERY. Filters HTTP requests that contain a particular query string.
- VERSION. Filters HTTP requests on the basis of the specified HTTP protocol version.
- HEADER. Filters on the basis of a particular HTTP header.
- URLLEN. Filters on the basis of the length of the URL.
- URLQUERY. Filters on the basis of the query portion of the URL.
- URLQUERYLEN. Filters on the basis of the length of the query portion of the URL only.
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Under Operator, click the down arrow and choose the operator for your policy expression. Some common operators are:
Operator | Description |
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== | Matches the specified value exactly or is exactly equal to the specified value. |
!= | Does not match the specified value. |
> | Is greater than the specified value. |
< | Is less than the specified value. |
>= | Is greater than or equal to the specified value. |
<= | Is less than or equal to the specified value. |
CONTAINS | Contains the specified value. |
CONTENTS | Returns the contents of the designated header, URL, or URL query. |
EXISTS | The specified header or query exists. |
NOTCONTAINS | Does not contain the specified value. |
NOTEXISTS | The specified header or query does not exist. |
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If a Value text box appears, type a string or numeric value, as appropriate. For example, chose REQ as the Flow Type, HTTP as the Protocol, and HEADER as the qualifier, and then type the value of the header string in the Value field and the header type for which you want to match the string in the Header Name text box.
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Click OK.
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To create a compound expression, click Add. Note that the type of compounding that is done depends on the following choices in the Create Policy dialog box:
- Match Any Expression. The expressions are in a logical OR relationship.
- Match All Expressions. The expressions are in a logical AND relationship.
- Tabular Expressions. Click the AND, OR, and parentheses buttons to control evaluation.
- Advanced Free-Form. Enter the expressions components directly into the Expression field, and click the AND, OR, and parentheses buttons to control evaluation.
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