How to Use Listen Policy to Create Virtual Servers with Same IP and Perform Selective Dual Authentication
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Article ID: CTX211473
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Description
You can use the Listen Policy feature of Citrix ADC (NetScaler) to use the same IP and FQDN and have selective authentication on the basis of the IP range.
Example: Single authentication for internal users and dual authentication for external users.
Instructions
Considering 10.103.0.0/16 as your internal user’s subnet and 10.104.0.0/16 as external user’s subnet, complete the following steps to configure the Listen Policy:
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While creating virtual server (single authentication), click Other Settings.

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Enter the internal IP range using expression editor.

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Enter a Listen Priority.

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Virtual server with same IP and Port.

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Welcome Screen 1

- Welcome Screen 2

Issue/Introduction
This article explains how to use listen policy to create virtual servers with same IP and perform selective dual authentication.
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