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AP talking directly to Radius, why?

Hello,

I have the following setup:
Sophos SG230, Firmware 9.113
Sophos AP50

Site with Sophos  IPSEC VPN-Tunnel  Site with Microsoft Radius Server


Problem: I have set up WPA2 Enterprise Authentication for a wireless network. However the radius client request is not coming from the sophos gateway as exepected, but instead from the AP! I can see this on the Microsoft NPS-Radius Server, that the AP with its DHCP assigned address is doing the radius request! What is this all about?

I have 6 other UTM 220 Installations with similar setup (but with AP10) and there always the  sophos gateway itself correctly does the radius requests. And not the APs!
However: Those UTM220 reach the Microsoft Radius Server not via IPSEC Tunnel, but via normal static routes (MPLS-Cloud).

How can I fix the SG230 to do the requests instead of the AP? Why does it behave that way? Its really weird and I can't explain. I even connected a AP10 to the gateway and also this AP does then the radius requests....
So it is not some kind of hardware difference between AP10 and AP50...

In another thread moderator "TOM" says:
"The ASG collects the RADIUS traffic from the APs and forwards it to the NPS"
And this is how I also know it, until today when I installed the SG230 with the weird behaviour.
Is the talking of the APs to the Radius server directly a kind of "fallback", if they cannot forward the requests via the Sophos gateway? (Remember the IPSEC Tunnel above!)..
But the sophos gateway and the APs are on the same subnet and both can reach the Radius Server...

Any help greatly appreciated.


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Parents
  • I'm really interested in what Sophos Support has to say about this!

    Cheers - Bob
     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
  • I involved support via our distributor, so will keep you updated on their findings.
    Anyhow.. What is the name and path of the config file for wireless security (radius settings)? Maybe I can get some clues there. Even though I involve support, I like doing detective work myself :-)
  • I have seen the described behavior before myself (in previous versions) occasionally... I'm in for an explanation too!

    CTO, Convergent Information Security Solutions, LLC

    https://www.convergesecurity.com

    Sophos Platinum Partner

    --------------------------------------

    Advice given as posted on this forum does not construe a support relationship or other relationship with Convergent Information Security Solutions, LLC or its subsidiaries.  Use the advice given at your own risk.

Reply
  • I have seen the described behavior before myself (in previous versions) occasionally... I'm in for an explanation too!

    CTO, Convergent Information Security Solutions, LLC

    https://www.convergesecurity.com

    Sophos Platinum Partner

    --------------------------------------

    Advice given as posted on this forum does not construe a support relationship or other relationship with Convergent Information Security Solutions, LLC or its subsidiaries.  Use the advice given at your own risk.

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