New-NetEventSession -LocalFilePath $Env:TEMP\SlowUp.etl -Name SlowUpĪdd-NetEventPacketCaptureProvider -TruncationLength 100 -Level 255 -SessionName SlowUpĪdd-NetEventProvider -Name "Microsoft-Windows-TCPIP" -Level 255 -SessionName SlowUp I do not have a record of what was changed, either a firewall update, Windows update or something else. I used to get normal speeds during upload. I think I tried all the suggested things, unless I missed something. I have an open ticket with Sophos and will bring up Out of Order delivery with them. My suspicion is on my Sophos XG firewall which would be why I can get acceptable speeds directly connected to my WAN connection on a client computer. I did read through your responses, but I had not run any measures to check for out of order delivery yet.
Server: Comcast - Sacramento, CA (id = 9436)ĭownload: 1232.96 Mbps (data used: 1.7 GB)Īll devices are fully updated, firmware included. ISP: Washington State K-20 Telecommunications Networkĭownload: 915.29 Mbps (data used: 1.2 GB) Server: Comcast - Seattle, WA (id = 1782) Linux (CentOS 8) speed tests: Speedtest by Ookla Windows Server 2019 Datacenter speed tests: Local iPerf3 tests ruled out my core router/switch/datacenter.Īll tests run from Hyper-V guests on Server 2019 Datacenter running on HPE ProLiant D元60 Gen10 hardware. I haven't been able to find any setting in Sophos XG to tweak that would make any difference. If I plug a client directly into my 10Gbit fiber before my firewall, I can get acceptable speeds on Windows. I have an HPE/Aruba network and a Sophos XG 310 v2 running SFOS 18.0.4 MR-4. There is an initial burst, but drops quickly. Going past a few hundred kilometers it drops to 30-70Mbps. Distance is a factor, as I can get 400Mbps to my local telco (which isn't my IPS). My ISP (Washington State K-20 Telecommunications Network) confirmed that their circuit is not the cause and is capable of 1800 Mbps symmetrical throughput. Upload speed in Windows is being throttled by something. I first noticed it when my offsite backups stopped completing in time.
I've been having this issue since at least January 2021 on my entire fleet of Windows devices.
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