Configure the correct ports and services to allow end users to authenticate using SSO through your on-premises Active Directory server from your corporate intranet locations.

Internet access on-premises gateway authentication proxy using Kerberos authentication diagram
Internet access on-premises gateway authentication proxy using Kerberos authentication
Internet Access on-premises gateway authentication Proxy using NTLM authentication diagram
Internet access on-premises gateway authentication Proxy using NTLM authentication
The authentication proxy service on the Zero Trust Secure Access Internet Access On-Premises Gateway facilitates NTLM v2 or Kerberos-supported single sign-on (SSO) authentication with your on-premises Active Directory server. The service retrieves settings and data from Trend Vision One via HTTPS through port 443 on firewall A.
Once configured, the authentication proxy service allows end users to reach your Active Directory server from endpoints under the following scenarios.
Secure Access Module status
Location
Connection method
Installed
Corporate network
Any method
Not installed
Corporate network
Through a configured Internet Access On-Premises Gateway or through the Internet Access Cloud Gateway from a defined IP address
Before configuring the authentication proxy service, you must have a Service Gateway virtual appliance installed with the Zero Trust Secure Access Internet Access On-Premises Gateway service enabled.

Procedure

  1. In Secure Access ConfigurationInternet Access ConfigurationGlobal Settings, enable Single Sign-On with Active Directory (On-Premises) and complete the configuration steps.
  2. Ensure that DNS can resolve the FQDN of the authentication proxy with the proper IP address for endpoints accessing from the corporate network.
    Note that if you are using:
    • a single gateway, the authentication proxy FQDN is the <single gateway FQDN>
    • multiple gateways behind a load balancer, authentication proxy FQDN is the <load balancer FQDN>