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Network Threat Protection causing SMB to timeout on all endpoints

Hi,

We are having issues where Sophos Network Threat Protection (NTP) is causing all Windows SMB file transfers to time out, all other network traffic seems unaffected. If the NTP feature is disabled in the local endpoint settings GUI the issue still occurs, however if the Windows service relating to SophosNtpService.exe is stopped the issue immediately goes away and network file access is normal. If the Windows service is started again manually or via a reboot the issue still doesn't come back in the limited testing so far.

Versions are: Intercept X 2022.1.1.22 (core agent 2022.2.1.9).

I don't have a ticket just yet as i'm waiting on our support portal account to get approved
Thanks for any help



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