Important note about SSL VPN compatibility for 20.0 MR1 with EoL SFOS versions and UTM9 OS. Learn more in the release notes.

Sophos Firewall: SATC with Sophos Server Protection Step by Step Guide

Disclaimer: This information is provided as-is for the benefit of the Community. Please contact Sophos Professional Services if you require assistance with your specific environment.


Table of Contents


Sophos Authentication for Thin client (*SATC) with Sophos Server Protection enables Sophos Firewall to authenticate users accessing a server or remote desktop.SATC is included with Sophos Server Protection in Sophos Central. It's part of Sophos Central Server Core Agent and is available with any Server Protection license in Sophos Central. Currently, SATC with Sophos Server Protection only supports Windows Remote Desktop Services.You must download the Windows Server installer from Sophos Central. The installers that you can download would depend on the licenses you have. 

Sophos Firewall controls those authenticated users using a session-based approach via an identity-based firewall rule providing more granular access controls per user group. 

SATC functionality is only supported on Windows Server 2016 and requires a Core Agent of  2022.2 and higher.

What To Do

Follow the steps below to set up new SATC client integration with Sophos Server Protection: 

For full details on enabling SATC with Sophos Central Server Protection see this help document:  SATC with Sophos Server Protection.

The steps below walk through the setup:

  1.  Turn off tamper protection for server protection. Note the current settings before you turn off tamper protection, as you need to change these back once SATC is activated. 

  2. On the server, open a command-line console/Power Shell. Add new parameter Satc PendDuration Ms in SATC, run the following command to turn on SatcPendDurationMs parameter  
    command: - reg add "HKLM\Software\Sophos\Sophos Network Threat Protection\Application" /v SatcPendDurationMs /t REG_DWORD /d 300 

    NOTE: We are updating the pend duration only when there is network latency

  3. Please ensure to reboot the Terminal Server once changes are applied. 

  4. Lastly, check the windows registry to confirm the changes under: HKLM\Software\Sophos\Sophos Network Threat Protection\Application  
  5. If you face any issues or need further assistance with this, kindly reach out to our Sophos Support team -


Added horizontal lines below disclaimer and end of RR, updated KB link to latest, Added table of contents
[edited by: Raphael Alganes at 1:19 PM (GMT -8) on 4 Dec 2023]
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  • Thank you for the reply...

    I have tried to provide access to Sophos support it took me a month case to escalate to the Global Support team, they have tried to provide me support many times, i have also spent around 10+ hours with for the remote support to diagnose the issue but, not done.. finally i have to uninstall the Sophos server protection, as it was high on server resources.

    Sophos as already discontinued the old SATC client, and the new solution is provided in full of bugs... what exactly does Sophos expect from the customers, to provide them with our production servers for their own research and developments?

    It is almost 1+ year Sophos has announced end of support or OLD SATC and new solution still in BETA...

    Looking forward to get some ETA announcement for the final and proper solution...

  • Hey ,

    The 2022.2.x version of the Server agent moves the SATC functionality out of IPS and into the Core product.

    We are due to release that to IT next week and start the Server release towards the end of July. 

    Thanks & Regards,

    Vivek Jagad | Team Lead, Global Support & Services 

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