Two factor authentication for Array Networks VPN

 

The LoginTC RADIUS Connector is a complete two-factor authentication virtual machine packaged to run within your corporate network. The LoginTC RADIUS Connector enables Array Networks appliances to use LoginTC for the most secure two-factor authentication.

User Experience

There are a wide variety of authentication mechanism users can use to perform MFA with Array Networks product suite.

Architecture

Authentication Flow

  1. A user attempts access with their existing Array Networks client with username / password
  2. A RADIUS authentication request is sent to the LoginTC RADIUS Connector
  3. The username / password is verified against an existing first factor directory (LDAP, Active Directory or RADIUS)
  4. An authentication request is made to LoginTC Cloud Services
  5. Secure push notification request sent to the user’s mobile or desktop device
  6. User response (approval or denial of request) sent to LoginTC Cloud Services
  7. The LoginTC RADIUS Connector polls until the user responds or a timeout is reached
  8. RADIUS Access-Accept sent back to Array Networks
  9. User is granted access to Array Networks 2 factor authentication
Compatibility

Array Networks appliance compatibility:

  • Array Networks supporting RADIUS authentication

Appliance not listed?
We probably support it. Contact us if you have any questions.

Compatibility Guide
Any other Array Networks appliance which have configurable RADIUS authentication are supported.

Prerequisites

Before proceeding, please ensure you have the following:

Create Application

Start by creating a LoginTC Application for your deployment. An Application represents a service (e.g. An application is a service (e.g., VPN or web application) that you want to protect. e) that you want to protect with LoginTC.

Create a LoginTC Application in LoginTC Admin Panel, follow Create Application Steps.

If you have already created a LoginTC Application for your deployment, then you may skip this section and proceed to Installation.

Installation
  1. Download the latest LoginTC RADIUS Connector:
  2. Unzip the file
  3. Import the virtual appliance your computer virtualization software
  4. Ensure that the LoginTC RADIUS Connector has a virtual network card
  5. Start the virtual appliance
  6. You will be presented with a console dashboard:
  7. The first thing you must do is set the logintc-user password:
  8. By default the appliance network is configured by DHCP. If you wish to manually configure the network, use the Down arrow key to navigate to Network Configuration and DNS Configuration
  9. For access to the web interface select Web Server and then Start:It may take 5-10 seconds to start the first time:
  10. Once started, access the web interface by navigating to the URL mentioned in the information box:

The LoginTC RADIUS Connector runs CentOS 7.7 with SELinux. A firewall runs with the following open ports:

Port Protocol Purpose
22 TCP SSH access
1812 UDP RADIUS authentication
1813 UDP RADIUS accounting
8888 TCP Web interface
443 TCP Web interface
80 TCP Web interface
80 TCP Package updates (outgoing)
123 UDP NTP, Clock synchronization (outgoing)

Note: Username and Password
logintc-user is used for SSH and web access. The default password is logintcradius. You will be asked to change the default password on first boot of the appliance and will not be able to access the web interface unless it is changed.

The logintc-user has sudo privileges.

Configuration for Array Networks MFA

Endpoints describe how the appliance will authenticate your RADIUS-speaking device with an optional first factor and LoginTC as a second factor. Each endpoint has 4 Sections:

1. LoginTC Settings

This section describes how the appliance itself authenticates against LoginTC Admin Panel with your LoginTC Application. Only users that are part of your organization and added to the domain configured will be able to authenticate.

2. User Directory

This section describes how the appliance will conduct an optional first factor. Either against an existing LDAP, Active Directory or RADIUS server. If no first factor is selected, then only LoginTC will be used for authentication.

3. Challenge Strategy / Passthrough

This section describes whether the appliance will perform a LoginTC challenge for an authenticating user. The default is to challenge all users. However with either a static list or Active Directory / LDAP Group you can control whom gets challenged to facilitate seamless testing and rollout.

4. Client Settings

This section describes which RADIUS-speaking device will be connecting to the appliance and whether to encrypt API Key, password and secret parameters.

The web interface makes setting up an endpoint simple and straightforward. Each section has a Test feature, which validates each input value and reports all potential errors. Section specific validation simplifies troubleshooting and gets your infrastructure protected correctly faster.

First Endpoint

Close the console and navigate to your appliance web interface URL. Use username logintc-user and the password you set upon initial launch of the appliance. You will now configure the LoginTC RADIUS Connector.

Create a new endpoint file by clicking + Create your first endpoint:

Web Server

LoginTC Settings

A list of available Applications will be displayed from your LoginTC organization. Select which LoginTC Application to use:

Web Server

Configure the application:

Web Server

Configuration values:

Property Explanation
Application ID The 40-character Application ID, retrieve Application ID
Application API Key The 64-character Application API Key, retrieve Application API Key
Request Timeout Number of seconds that the RADIUS connector will wait for

The Application ID and Application API Key are found on the LoginTC Admin Panel.

Request Timeout

Make a note of what you set the Request Timeout to as you will need to use a larger timeout value in your RADIUS client. We recommend setting the Request Timeout value to 60 seconds in the LoginTC RADIUS Connector and setting the RADIUS authentication server timeout to 70 seconds in RADIUS Client. For more information see: Recommended settings for an optimal user experience for VPN access

Click Test to validate the values and then click Next:

Web Server

User Directory

Configure the user directory to be used for first authentication factor in conjunction with LoginTC. You may use Active Directory / LDAP or an existing RADIUS server. You may also opt not to use a first factor, in which case LoginTC will be the only authentication factor.

Web Server

Active Directory / Generic LDAP Option

Select Active Directory if you have an AD Server. For all other LDAP-speaking directory services, such as OpenDJ or OpenLDAP, select Generic LDAP:

Web Server

Configuration values:

Property Explanation Examples
host Host or IP address of the LDAP server ldap.example.com or 192.168.1.42
port (optional) Port if LDAP server uses non-standard (i.e., 389/636) 4000
bind_dn DN of a user with read access to the directory cn=admin,dc=example,dc=com
bind_password The password for the above bind_dn account password
base_dn The top-level DN that you wish to query from dc=example,dc=com
attr_username The attribute containing the user’s username sAMAccountName or uid
attr_name The attribute containing the user’s real name displayName or cn
attr_email The attribute containing the user’s email address mail or email
LDAP Group (optional) The name of the LDAP group to be sent back to the authenticating server. SSLVPN-Users
encryption (optional) Encryption mechanism ssl or startTLS
cacert (optional) CA certificate file (PEM format) /opt/logintc/cacert.pem

Click Test to validate the values and then click Next.

Existing RADIUS Server Option

If you want to use your existing RADIUS server, select RADIUS:

Web Server

Configuration values:

Property Explanation Examples
IP Address or Host Name Host or IP address of the RADIUS server radius.example.com or 192.168.1.43
Authentication Port (optional) Port if the RADIUS server uses non-standard (i.e., 1812) 1812
Shared Secret The secret shared between the RADIUS server and the LoginTC RADIUS Connector testing123

RADIUS Vendor-Specific Attributes

Common Vendor-Specific Attributes (VSAs) returned by the RADIUS server will be relayed.

Click Test to validate the values and then click Next.

Challenge Strategy / Passthrough

Configure which users will be challenged with LoginTC. This allows you to control how LoginTC will be phased in for your users. This flexibility allows for seamless testing and roll out.

Web Server

For example, with smaller or proof of concept deployments select the Static List option. Users on the static list will be challenged with LoginTC, while those not on the list will only be challenged with the configured First Authentication Factor. That means you will be able to test LoginTC without affecting existing users accessing your VPN.

For larger deployments you can elect to use the Active Directory or LDAP Group option. Only users part of a particular LDAP or Active Directory Group will be challenged with LoginTC. As your users are migrating to LoginTC your LDAP and Active Directory group policy will ensure that they will be challenged with LoginTC. Users not part of the group will only be challenged with the configured First Authentication Factor.

Challenge All Users

Select this option if you wish every user to be challenged with LoginTC.

Challenge Users Based on Static Username List

Select this option if you wish to have a static list of users that will be challenged with LoginTC. Good for small number of users.

Web Server

LoginTC challenge users: a new line separated list of usernames. For example:

            jane.doe
            jane.smith
            john.doe
            john.smith

Challenge Users Based on Group Membership

Select this option if you wish to have only users part of a particular Active Directory or LDAP group to be challenged with LoginTC. Good for medium and large number of users.

Web Server

Configuration values:

Property Explanation Examples
Challenge Groups (Optional) Comma separated list of groups for which users will be challenged with LoginTC SSLVPN-Users or two-factor-users
Challenge Groups (Optional) Comma separated list of groups for which users will always bypass LoginTC NOMFA-Users

Click Test to validate the values and then click Next.

Client Settings

Configure RADIUS client (e.g. your RADIUS-speaking VPN):

Web Server

Client configuration values:

Property Explanation Examples
name A unique identifier of your RADIUS client CorporateVPN
IP Addresss The IP address of your RADIUS client (e.g. your RADIUS-speaking VPN). Add additional IP Addresses by clicking plus. 192.168.1.44
Shared Secret The secret shared between the LoginTC RADIUS Connector and its client bigsecret

Under Authentication Mode select Challenge

Web Server

The user will be prompted on how they wish to proceed with second-factor authentication (e.g. LoginTC Push, OTP, bypass code). Your RADIUS client must support RADIUS challenges to use this. Challenging the user will often result in a better user experience. See User Experience for more information.

Click Test to validate the values and then click Save.

Web Server Testing

When you are ready to test your configuration, create a LoginTC user (if you haven’t already done so). The username should match your existing user. Provision a token by following the steps:

  1. In a new tab / window log into the LoginTC Admin Panel
  2. Click Domains
  3. Click on your domain
  4. Click on MembersWeb Server
  5. Click Issue Token button beside your user:Web Server
  6. A 10-character alphanumeric activation code will appear beside the user:Web Server
  7. Open the LoginTC mobile app.
  8. Enter the 10-character alphanumeric activation code:
  9. Load the token to complete the process

When you have loaded a token for your new user and domain, navigate to your appliance web interface URL:

Web Server

Click Test Configuration:

Web Server

Enter a valid username and password; if there is no password leave it blank. A simulated authentication request will be sent to the mobile or desktop device with the user token loaded. Approve the request to continue:

Web Server

Congratulations! Your appliance can successfully broker first and second factor authentication. The only remaining step is to configure your RADIUS device!

If there was an error during testing, the following will appear:

Web Server

In this case, click See logs and then click the /var/log/logintc/authenticate.log tab to view the log file and troubleshoot:

Web Server

Array Networks VPN Configuration

Once you are satisfied with your setup, configure your Array Networks VPN client to use the LoginTC RADIUS Connector.

For your reference, the appliance web interface Settings page displays the appliance IP address and RADIUS ports:

Web Server

The following are quick steps to get VPN access protected with LoginTC. The instructions can be used for existing setups as well.

  1. Login to your Array Networks appliance and select your Virtual Site:Array Networks Login
  2. Choose Config Mode and go to Site Configuration > AAA:Array Networks AAA
  3. Under Server > RADIUS tab enter the desired name for your Radius servers group, give the group a name (LoginTC-Radius in our example) then click Add to create the group:Array Networks AAA
  4. Once added, double click your RADIUS Server Group name that you just created:Array Networks AAA
  5. This will open the editor for the RADIUS server group that was just created:Array Networks AAA
  6. Click on Add RADIUS Server link in the RADIUS SERVER CONFIGURATION section. Enter the details for your LoginTC RADIUS Connector:Array Networks AAA
    Property Explanation Example
    Server IP IP Address of your LoginTC RADIUS Connector. 192.168.1.7
    Server Port RADIUS authentication port. Must be 1812. 1812
    Secret Password The secret shared between the LoginTC RADIUS Connector and its client. bigsecret
    Timeout Indicates how long the appliance will wait for a response from the Radius server. Recommended 70 second minimum. 70
    Redundancy Order Specifies the position in a multi RADIUS servers list. 1
    Retries Specifies how many retries if no authentication response. Recommended 1. 1
    Accounting Port RADIUS accounting port. Must be 1813. 1813
  7. Click Save. This will take you back to the previous section:Array Networks AAA
  8. Click the Method tab:Array Networks AAA
  9. Click Add Method to add your RADIUS group as the authentication method. Update the properties described in the table below:Array Networks AAA
    Property Explanation Example
    Method Name Name you configure for this authentication method. LoginTC
    Authentication Select the Authentication Server group previously created LoginTC-Radius
  10. Click Save. This will take you back to the previous section:Array Networks AAA
  11. In order to send Accounting messages to the Login TC Radius Connector, click the Accounting tab:Array Networks AAA
  12. Configure the RADIUS Accounting Settings:Array Networks AAA
  13. Click APPLY CHANGES
  14. If LoginTC should be the only method to authenticate, delete the previous method in the Method tab and only leave LoginTC as the only method:Array Networks AAA

To test, open the Array Networks VPN Client and attempt access.

User Management

There are several options for managing your users within LoginTC:

Logging

Logs can be found on the Logs tab:

Web Server

Troubleshooting

Not Authenticating

If you are unable to authenticate, navigate to your appliance web interface URL and click Status:

Web Server

Ensure that all the status checks pass. For additional troubleshooting, click Logs:

Web Server

Email Support
For any additional help please email support@cyphercor.com. Expect a speedy reply.

Upgrading

From 3.X

Follow these instructions to upgrade your LoginTC RADIUS virtual appliance to the latest version (3.0.7):

  1. SSH into the virtual appliance or open the console (use same username / password as web GUI)
  2. cd /tmp
  3. curl -O https://www.logintc.com/downloads/logintc-radius-connector-3.0.7-upgrade.sh
  4. sudo sh logintc-radius-connector-3.0.7-upgrade.sh

The upgrade script will restart your appliance after upgrading.

Upgrade Script Download Verification

Execute: sha1sum /tmp/logintc-radius-connector-3.0.7-upgrade.sh

Output SHA‑1 should match: 631fa21d614a1976e9c6141471878f114e544994

From 2.X

Important: LoginTC RADIUS Connector 2.X End-of-life

The LoginTC RADIUS Connector 2.X virtual appliance is built with CentOS 6.8. CentOS 6.X is End of Lifetime (EOL) November 30th, 2020. Although the appliance will still function it will no longer receive updates and nor will it be officially supported.

New LoginTC RADIUS Connector 3.X

A new LoginTC RADIUS Connector 3.X virtual appliance has been created which runs CentOS 7.7.1908. It is virtually identical to the existing appliance, with the exception of the underlying operating system. Inline upgrade from CentOS 6.X to CentOS 7.X is not supported. As a result upgrade is deploying a new appliance. A migration script has been created to help quickly copy over existing configurations and ssl certificates to the new appliance and minimize manual steps.

Complete 2.X to 3.X upgrade guide: LoginTC RADIUS Connector Upgrade Guide

Additional Resources

Start your free trial today. No credit card required.

Sign up and Go