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Unable to Send Radius Request Across the VPN from Dedicated Interfaces

03/26/2020 21 People found this article helpful 196,947 Views

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    Description

    Issue- Not able to send Radius Request across the VPN from dedicated interfaces

    Cause

    Binding effect of inbuilt Feature "SEND THROUGH VPN TUNNEL"

    Resolution

     

     

    Image

    Customer has a Radius server across the Site to Site VPN behind another SonicWall and customer’s requirement is to send request to the Radius Server from a VLAN interface X1:V10 and not from X0 interface.

     

    Image

     

     

    We configured the Radius Server on Site A’s SonicWall and enabled “SEND THROUGH VPN TUNNEL”:

     

    Image

     

    Under the Site to Site VPN settings, we set up LOCAL Network as “X1:V10 INTERFACE IP” and REMOTE Network as 192.168.17.0/24 Address Object (Site B Subnet) on Site A:

     

    Image

    After setting up the Radius Server on Site A and Site to Site VPN, we tried to test a User and found that the request was going through X0 interface instead of X1:V10 interface:

     

    Image

     

    In this scenario, the Check Box  “SEND THROUGH VPN TUNNEL” is required to be checked to send the requests across the VPN tunnel but it also binds these requests to X0 interface even if we have specified LOCAL network for Site to Site VPN as “X1:V10 Interface IP” on Site A.

     

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    After running a couple of tests we were unable to redirect the traffic via X1:V10 interface as X0 interface was always taking precedence. So for testing purpose we UNCHECKED the “SEND THROUGH VPN TUNNEL” check box and traffic started redirecting through X1:V10 interface.

     

    So the conclusion to the above discussed issue is, if you want to redirect traffic to send Radius requests via a dedicated interface of your choice then “SEND THROUGH VPN TUNNEL” must be unchecked.

     

    Example, we have the option to redirect traffic for SYSLOGS via dedicated interface:

     

    Image

     

    Similarly, we can do the same for Radius server but by unchecking the “SEND THROUGH VPN TUNNEL” check box.

    Related Articles

    • Bandwidth usage and tracking in SonicWall
    • How to force an update of the Security Services Signatures from the Firewall GUI
    • Configure Guest VLAN in the TZ firewall, for guest users to access Internet only.

    Categories

    • Firewalls > TZ Series > User Login
    • Firewalls > SonicWall NSA Series > User Login

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