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Endpoint slow down internet speed

Hello,

We got a dedicated optical fiber 1gb Down/up .

With the endpoint installed, the speed download seems to be block around around 150 to 300 mb/s. Upload is correct.

IF i uninstall it, then the speed go back to normal with around 900 mb/s. Tests are made through NPERF. 

I tried a to play with settings on sophos central but none of them seems to make it work normally.

Does someone experiencing this issue or does know how to fix it ?


Note: Please see the following Blog Post for the latest update regarding this issue



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  • I'm also getting the same issue, how can we resolve this permanently, without compromising on security?

    Speed is reduced to around 300, if "Internet" from Real Time Scanning is disabled, then the speed increases to over 900 on a 1gb LL.

  • same problem here guys... no solution provided at moment by Sophos... just a message asking to open one more ticket...frustrating. almost 1000 devices afected.

  • Hello, out of interest, how do you check the speed?  Do you use a specific site or app?

    For example, what does Internet Speed Test | Fast.com give you in the way of results with and without the internet scanning and web control feature on? Essentially if the process SophosNetFilter.exe is running or is not running. 

    If SophosNetFilter.exe process is running, at least one of the web protection/control features is active.  If it's not running, then all web protection/control is off. 

    Additionally, download reputation feature can still be on, that is a scan post download for browsers that support IOfficeAntiVirus interfaces, such as Chrome, Edge but not Firefox.

    Also, do you have SSL/TLS decryption of HTTPS websites enabled or disabled?

    To check on the endpoint, the value of https_decrypt_enabled under the key:

    HKEY_LOCAL_MACHINE\SOFTWARE\Sophos\Management\Policy\ThreatProtection\[latest]\web_protection

    will be 1 to be enabled and 0 to be disabled.

    Thanks.

  • Having the same issue also with NTP.  Taking 1gb service down to 100-150mb.

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