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Need help setting up Duo Security for 2FA with Meraki MX84 VPN

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Last Modified: 2019-01-16
We are currently using a Meraki MX84 for VPN.  It connects to our Active Directory to authenticate users.
I am setting up a Duo Authentication Proxy to tie into my Meraki MX84 so I can have Multi-Factor Authentication on my VPN.  The Duo Auth Proxy is asking for a Radius Secret from the Meraki.  I am not sure where to setup the connection on the Meraki side.  Am I setting up sign in with my Radius Server under Access control?
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Jody LemoineNetwork Architect
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Commented:
The RADIUS servers and secrets are set up under the Client VPN section of the portal. Screenshot is attached. If you've been authenticating directly against Active Directory, your authentication may not be set up for RADIUS and so the secret field will be hidden.
Screen-Shot-2018-12-11-at-2.54.59-PM.png
Relay700IT Manager

Author

Commented:
Thanks Jody.
So when I add the Radius Server Host, Port and Secret there will my VPN clients stop working instantly or will they still be able to connect while I troubleshoot the integration with Duo?
Jody LemoineNetwork Architect
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Commented:
They won't stop working instantly, but new connections won't be able to establish while you're troubleshooting. If possible, I would set an after-hours window for testing, just so you don't have angry users.
Relay700IT Manager

Author

Commented:
Thanks Jody.  I will setup a maintenance window and give it a shot.  Have you done this with the Duo 2 factor?  If so, anything I should watch out for?
Network Architect
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Relay700IT Manager

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Commented:
I am a bit confused Jody.  I thought the Duo Authentication Proxy acted as the Radius Server and talked to Active Directory.  Wouldn't this negate the need for Microsoft NPS?
Jody LemoineNetwork Architect
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Commented:
I believe that may be an option, but I've never used it. I've always gone through NPS because it allows for remote access policies. If you authenticate directly off of AD, the only real control you have is the dial-in permission field in the user properties.
Relay700IT Manager

Author

Commented:
Are you still out there Jody?
Relay700IT Manager

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Commented:
Thanks Jody for getting me up and running!!