Secure Tunnel proxy server

SSO and Proxy Considerations for MDX Apps

XenMobile integration with NetScaler enables you to provide users with single sign-on (SSO) to all backend HTTP/HTTPS resources. Depending on your SSO authentication requirements, you can configure user connections for an MDX app to use Secure Browse, which is a type of clientless VPN, or Full VPN Tunnel. If NetScaler isn't the best way to provide SSO in your environment, you can set up an MDX app with policy-based local password caching. This article explores the various SSO and proxy options, with a focus on Secure Web. The concepts apply to other MDX apps.

The following flow chart summarizes the decision flow for SSO and user connections.

NetScaler Authentication Methods

This table provides some general information about the authentication methods supported by NetScaler.

Authentication option

Configuration requirement summary

SAML Authentication

When you configure NetScaler for Security Assertion Markup Language (SAML), users can connect to web applications that support the SAML protocol for single sign-on. NetScaler Gateway supports the identity provider (IdP) single sign-on for SAML web applications.

Configure SAML SSO in the NetScaler Traffic profile. Configure the SAML iDP for the requested service.

NTLM Authentication

NetScaler performs this automatically if SSO to web applications is enabled in the session profile.

Enable SSO in the NetScaler Session or Traffic profile.

Kerberos Impersonation

XenMobile supports Kerberos for Secure Web only.

When you configure NetScaler for Kerberos SSO, NetScaler uses impersonation when a user’s password is available to NetScaler. Impersonation means that NetScaler leverages user credentials to get the ticket needed to gain access to service(s), such as Secure Web.

Configure the NetScaler Worx Session policy to allow it to identify the Kerberos Realm from your connection.

Configure on NetScaler a Kerberos Constrained Delegation (KCD) account that has no password and is bound to a traffic policy on your XenMobile gateway.

Kerberos Constrained Delegation

When you configure NetScaler for Kerberos SSO, NetScaler uses constrained delegation when a user's password is not available to NetScaler. With constrained delegation, NetScaler uses a specified administrator account to get tickets on behalf of users and services.

Configure a KCD account in Active Directory with the required permissions and a KDC account on NetScaler.

Enable SSO in the NetScaler Traffic profile.

Configure the back-end Website for Kerberos authentication.

Form Fill Authentication

When you configure NetScaler for Form-based single sign-on, users can log on one time to access all protected applications in your network.

Applies to apps that use Secure Browse or Full VPN modes.

Configure Form-based SSO in the NetScaler Traffic profile.

Digest HTTP Authentication

NetScaler performs this automatically if you enable SSO to web applications in the session profile.

Basic HTTP Authentication

Secure Browse, Full VPN Tunnel, or Full VPN Tunnel with PAC

In addition to the following table that describes the user connection types for Secure Web, also see this Secure Web article in the Citrix documentation, Configuring User Connections.

User connection type


Full VPN Tunnel

Connections that tunnel to the internal network can use a full VPN tunnel, configured by the Secure Web Preferred VPN mode policy. Citrix recommends Full VPN tunnel for connections that use client certificates or end-to-end SSL to a resource in the internal network. Full VPN tunnel handles any protocol over TCP. You can use full VPN tunnel with Windows and Mac computers as well as iOS and Android devices.

In Full VPN Tunnel mode, NetScaler does not have visibility inside an HTTPS session.


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