ZyWALL OTP Co works with Active Directory Not Only Enhances Password Security but Also Simplifies Account Management

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1 ZyWALL OTP Co works with Active Directory Not Only Enhances Password Security but Also Simplifies Account Management Problem: The employees of a global enterprise often need to telework. When a sales representative attends customer site for a product demonstration or when an engineer comes over to customer site for onsite service, they very often need to retrieve information or documents which are only available on the corporate network. The company has implemented Microsoft Active Directory as the directory service to provide the means to manage the identities and relationships that make up the corporate Local Area Network. To simplify the users experience and improve working efficiency for the employees who require to frequently accessing corporate network application when they are working outside the company, the IT department in the company had decided to roll out SSL VPN remote access service over the secured corporate network resource to the mobile users. The mobile users sometimes need to remotely access the corporate network by using a public computer or any computer from customer site. Therefore, enhancing user account security became an essential criteria for the remote access service. A secure password is commonly difficult to remember. Very often the users forgot their own password, and call the IT department to reset the password for them. These events heavily increase the work load of help desk. In order to simplify user account management and enhance the user account password security, finally the IT department decided to employ Active Directory Service in conjunction with OTP (One Time Password) as the SSL VPN authentication method for the mobile application users

2 ZyXEL Solution: How does ZyWALL OTP co work with Microsoft Active Directory over the SSL VPN application? The user opens a web browser on the remote client PC and connects to the ZyWALL logon page. ZyWALL logon page comes up and the user enters the logon information, known as the Microsoft Active Directory domain username, domain password and OTP (One Time Password) generated from the ZyWALL OTP hardware token. The client PC sends the user account information to the ZyWALL. The ZyWALL relay the entire logon information to the back end authentication server (ASAS Server). The ASAS server keeps the OTP and forwards the domain user name and domain password to the AD server. The AD server verifies the username and the password and feedbacks ASAS the result from authentication. The ASAS server verifies the OTP if authentication is successful, otherwise, it denies the remote access attempt. If OTP verification succeeds, then it grants access. Note: There are totally 3 different types of ZyWALL OTP operation mode: Default Mode = (Login SSL VPN) with OTP Pin + OTP OTP Mode = OTP only AD Mode = Domain Password + OTP In the application scenario discussed here, the ZyWALL OTP runs in AD Mode. In order to employ Active Directory in conjunction with the ZyWALL OTP authentication over the ZyWALL 1050 SSL VPN, there are few phases to be discussed. The following sections provide detail configuration instructions for connection over the ZyWALL 1050 / Microsoft Active Directory / ZyWALL OTP ASAS. Microsoft Active Directory Configuration: Create a Microsoft Active Directory user account for remote login over the ZyWALL 1050 SSL VPN 2

3 ZyWALL 1050 Configuration: Create an External User over the ZyWALL 1050 Create a SSL VPN Application Configure Access Privilege Configure AAA Server Configure Auth. Method ZyWALL OTP ASAS Configuration: Add a NAS Entry Assign the NAS Entry to the newly created user Switch the ASAS Operation into AD mode Add a LDAP Server by using ASAS web Management Console Active Directory configuration: Domain name: cso.net IP Address: ZyWALL ASAS Server: IP Address: Active Directory Configuration: In this section, you will create a new user through the Active Directory Domain Controller for SSL VPN application. STEP 1: On the DC (Domain Controller), open the management console from Start > Administrative Tools > Active Directory Users and Computers

4 STEP 2: Right Click on the User group name or OU (Organization Unit) name and select New > User. STEP 3: Fill in the user account details, e.g. First Name, Last Name and logon name. Click Next to enter the user password page. STEP 4: Enter the AD account password. 4

5 STEP 5: Click Finish in order to complete user creation

6 ZyWALL 1050 Configuration: STEP 1: Create an External User over the ZyWALL 1050 Navigate to ZyWALL > Object > User/Group, click on Add. Enter the user name (same as the AD user name) and specify the user type as Ext User. STEP 2: Create an SSL Application Create a Web Application by navigating to ZyWALL > Object > SSL Application and clicking on Add. STEP 3: Assign the Access Privilege Navigate to ZyWALL > SSL VPN > Access Privilege. Click Add in order to create a new SSL VPN Access Policy. Name the newly created SSL VPN policy and assign the newly created user and the SSL VPN application he is to be allowed to access. Click OK to complete SSL VPN policy configuration. 6

7 STEP 4: Configure the RADIUS Server (ASAS Server) Navigate to ZyWALL > Object > AAA Server > RADIUS, specify the ASAS server IP / Authentication Port / Key. (Note: Key is the Shared Secret value you configure on ZyWALL OTP ASAS server.) STEP 5: Configure the Authentication Method Navigate to ZyWALL > Object > Auth. Method > Edit, add Group Radius

8 ASAS Configuration: STEP 1: Add a NAS Entry Logon into the ASAS WMC by using a ASAS administrator account. Click Server Configuration > NAS Entries > Add NAS Entry. Please fill the table up with information provided by the Active Directory or network administrator and then click Add. In the Name column, please fill a name that represents the domain controller that is going to have two of the Active Directory plug ins installed. The IP Address is the IP address of the designated domain controller. The Shared Secret is the handshake message between the ASAS and domain controller. Here please fill it with the string radius, for it is the default radius secret. 8

9 STEP 2: Assign the NAS Entry to the newly created user STEP 3: Manually change the ASAS Operation into AD Mode Edit the AuthServer.properties which located in c: \ program files \ Authenex \ ASAS \ Server \ lib. Find the parameter OTP PIN Mode and change its value to ad

10 STEP 4: Add a LDAP Server from ASAS WMC (Web Management Console) Click Server Configuration > LDAP Servers > Add LDAP Servers in order to create a LDAP server. Fill in the following details into the LDAP server table as follows: Name: MSAD IP Address: (Known as the Active Directory Server IP Address.) User Name: cn=administrator,cn=users,dc=cso,dc=net User Password: Password (Known as the AD administrator password.) Organization: dc=cso, dc=net STEP 5: Restart the Authenex RADIUS Server in advance the complete configuration over ASAS. 10

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12 Validation: Once you complete the previous configuration, you can start to validate by logon into the ZyWALL SSL VPN. Remark: User name: Active Directory domain username Password: Active Directory domain password One time Password: The 6 digits one time password generated from the ZyWALL OTP token 12

13 If the authentication is successful, you will see the welcome message from the personal portal