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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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Configuring and Managing Virtual IP (VIP) Addresses
Configuration of a virtual server IP (VIP) address is not mandatory during initial configuration of the Citrix ADC. When you configure load balancing, you assign VIP addresses to virtual servers.
For more information about configuring a load balancing setup, see Load Balancing.
In some situations, you need to customize VIP attributes or enable or disable a VIP address. A VIP address is usually associated with a virtual server, and some of the VIP attributes are customized to meet the requirements of the virtual server. You can host the same virtual server on multiple Citrix ADC appliances residing on the same broadcast domain, by using ARP and ICMP attributes. After you add a VIP (or any IP address), the appliance sends, and then responds to, ARP requests. VIPs are the only Citrix ADC-owned IP addresses that can be disabled. When a VIP address is disabled, the virtual server using it goes down and does not respond to ARP, ICMP, or L4 service requests. As an alternative to creating VIP addresses one at a time, you can specify a consecutive range of VIP addresses.
To create a VIP address by using the CLI:
At the command prompt, type:
- add ns ip <IPAddress> <netmask> -type <type>
- show ns ip <IPAddress>
Example:
> add ns ip 10.102.29.59 255.255.255.0 -type VIP
Done
To create a range of VIP addresses by using the CLI:
At the command prompt, type:
- add ns ip <IPAddress> <netmask> -type <type>
- show ns ip <IPAddress>
Example:
> add ns ip 10.102.29.[60-64] 255.255.255.0 -type VIP
ip "10.102.29.60" added
ip "10.102.29.61" added
ip "10.102.29.62" added
ip "10.102.29.63" added
ip "10.102.29.64" added
Done
To enable or disable an IPv4 VIP address by using the CLI:
At the command prompt, type one of the following sets of commands to enable or disable a VIP and verify the configuration:
- enable ns ip <IPAddress>
- show ns ip <IPAddress>
- disable ns ip <IPAddress>
- show ns ip <IPAddress>
Example:
> enable ns ip 10.102.29.79
Done
> show ns ip 10.102.29.79
IP: 10.102.29.79
Netmask: 255.255.255.255
Type: VIP
state: Enabled
arp: Enabled
icmp: Enabled
vserver: Enabled
management access: Disabled
telnet: Disabled
ftp: Disabled
ssh: Disabled
gui: Disabled
snmp: Disabled
Restrict access: Disabled
dynamic routing: Disabled
hostroute: Disabled
Done
> disable ns ip 10.102.29.79
Done
> show ns ip 10.102.29.79
IP: 10.102.29.79
Netmask: 255.255.255.255
Type: VIP
state: Disabled
arp: Enabled
icmp: Enabled
vserver: Enabled
management access: Disabled
telnet: Disabled
ftp: Disabled
ssh: Disabled
gui: Disabled
snmp: Disabled
Restrict access: Disabled
dynamic routing: Disabled
hostroute: Disabled
Done
To configure a VIP address by using the GUI:
Navigate to System > Network > IPs > IPV4s, and add a new IP address or edit an existing address.
To create a range of VIP addresses by using the GUI:
- Navigate to System > Network > IPs > IPV4s.
- In the Action list, select Add Range.
To enable or disable a VIP address by using the GUI:
- Navigate to System > Network > IPs > IPV4s.
- Do one of the following:
- Select a VIP address.
- Hold down the Ctrl key and select multiple server address entries.
- Hold down the Shift key and select a range of server address entries.
- Select all the addresses by selecting the checkbox on the left side of the header row.
- From the Action list, select Disable or Enable.
Detecting a Citrix ADC Appliance in a UDP Load Balancing Setup through TTL Updates
The following table displays how a Citrix ADC appliance handles the TTL value of received packets in different functionalities.
Functionality | TTL value |
---|---|
Virtual Server | TTL is set to 255 when forwarding the request to the backend servers. TTL is decremented by 1 when forwarding the response to the client. |
L2 Mode | TTL is not changed. |
L3 Mode | TTL is set to 255. |
INAT | TTL is set to 255 when forwarding the request to the backend server. TTL is decremented by 1 when forwarding the response to the client. |
Some enterprises/scenarios running a monitoring application requires the Citrix ADC appliance of a load balancing setup to be detected as one of the hop in a traceroute. A Citrix ADC appliance of a load balancing setup is not detected in a traceroute because the appliance, by default, sets the TTL value to 255 instead of decrementing it when forwarding the request to a backend server.
To meet this requirement, Decrement TTL parameter of a VIP address can be used. This parameter applies to all UDP virtual servers using this VIP.
When you enable the Decrement TTL parameter of a VIP, the Citrix ADC appliance decrements the TTL value by 1 instead of setting it to 255 when forwarding requests, which are received on the UDP virtual servers that uses this VIP.
Monitoring applications using traceroute data can now detect the presence of a Citrix ADC appliance of a UDP load balancing setup.
Before You Begin
Before you begin configuring a Citrix ADC appliance to be detected in a traceroute of a load balancing setup, note the following points:
- Decrement TTL parameter is supported only for UDP load balancing virtual servers.
- Decrement TTL parameter is supported for IPv4 VIP as well as IPv6 VIP (VIP6) addresses.
- Decrement TTL parameter is supported for standalone Citrix ADC appliances as well as for high availability (HA) and cluster setups.
Configuration Steps
Configuring a Citrix ADC appliance to be detected in a traceroute of a UDP load balancing setup consists of the following tasks:
- Create a UDP load balancing configuration
- Enable the Decrement TTL parameter for the VIP address
CLI Procedures
To enable the decrement TTL option for a VIP address by using the CLI:
- To enable the decrement TTL option for a VIP address while adding the VIP address, at the command prompt, type:
- add ns ip <ip> <mask> -type VIP -decrementTTL ENABLED
- show ns ip <VIP address>
- To enable the decrement TTL option for an existing VIP address, at the command prompt, type:
- set ns ip <ip> <mask> -decrementTTL ENABLED
- show ns ip <VIP address>
To enable the decrement TTL option for a VIP6 address by using the CLI:
- To enable the decrement TTL option for a VIP6 address while adding the VIP6 address, at the command prompt, type:
- add ns ip6 <IP6/prefix> <mask> -type VIP -decrementTTL ENABLED
- show ns ip6 <VIP6/prefix>
- To enable the decrement TTL option for an existing VIP6 address, at the command prompt, type:
- set ns ip6 <ip6/prefix> <mask> -decrementTTL ENABLED
- show ns ip6 <VIP6 address>
> add ns ip 203.0.113.30 -type VIP -decrementTTL ENABLED
Done
> add ns ip6 2001:DB8:5001::30 -type VIP -decrementTTL ENABLED
Done
GUI Procedures
To enable the decrement TTL option for a VIP address by using the GUI:
Navigate to System > Network > IPs > IPv4s, and enable the Decrement TTL parameter while adding a new VIP address or editing an existing address.
To enable the decrement TTL option for a VIP6 address by using the GUI:
Navigate to System > Network > IPs > IPv6s, and enable the Decrement TTL parameter while adding a new VIP6 address or editing an existing address.
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