USG Series - Authenticate SSL VPN clients with Microsoft Active Directory

The following article explains, how to authenticate SSL VPN Clients with Microsoft Active Directory

In this scenario, we have a AD server with the configuration as below:

1. IP: 192.168.1.35
2. Domain name: cso.net
3. Domain user: aduser
4. Domain administrator: administrator
5. Domain administrator's password: admin1234

[Configuration Steps]

Step 1: Create a SSL VPN Connection. You can check the walkthrough in the following article:

How to create an SSL VPN Tunnel (via SecuExtender software)
 

Step 2: Add a user on the Domain -Controller named "SSL-User"
 

Step 3: Add a user on the ZyWALL and select the user type as Ext-User

Step 4: On the ZyWALL, click "SSL" from left panel and add the user "SSL-user" to the policy of the SSL Application that you added on step 1.

Step 5: Configure the Auth.Method, add the "group ad" in the default method.

Step 6: Configuring the AAA server from "Object" > "AAA Server" > Active Directory and refer the parameters listed below to complete the settings.

 

[Paramaters]
Host: 192.168.1.35
Port: 389
Base DN: dc=cso,dc=net     
Bind DN: cn=administrator,cn=users,dc=cso,dc=net
Password: admin1234(Domain administrator's password)
Search time limit: 5

CN is also possible with ext-group-user.

Test result:

If you scroll down you can test the AD connection in the option "Configuration Validation"

+++ You can buy licenses for your Zyxel VPN clients (SSL VPN, IPsec) with immediate delivery by 1-click: Zyxel Webstore +++

KB-00143