Sophos Central Real Time Scanning "Internet" slow down

Question

So I've been pulling my hair out for the past month with internet slowness, High MS when pinging, and Resolving DNS. Ithink I found the issue and not sure how I could fix it. It turns out if I disable "Internet" within the Sophos Central menu every runs alot smoother. Does anyone else experience this? Is there a fix to this?

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DianneY · Answer

Hello Luke Deubner 
 Interesting that you mentioned Windows Defender - can you disable this completely and see if the issue persists? Ideally third party AV or scanning applications shouldn't be running alongside each other if they perform similar features, otherwise this may cause performance issues. 
 You also mentioned Cisco Umbrella Roaming Client -- some features of this may be interacting with Real-time Scanning (Internet) features. If this application has vendor-recommended A/V exclusions, it is best to include this in your Threat Protection Policy in Sophos. 
 I also found this: https://support.umbrella.com/hc/en-us/articles/230901148-Umbrella-Roaming-Client-Known-Incompatibilities- 
 Perhaps adding 127.0.0.1 as a Website Exclusion (in your Threat Protection Policy's Scanning Exclusions ) also helps? 
 If that does not help, I would suggest uninstalling Cisco Umbrella Roaming Client completely (together with disabling Windows Defender) to see if the issue still occurs. I would think that what Cisco Umbrella Roaming client could be similar to what Sophos Internet Real-time scanning and both cannot be enabled.