Synology DSM Reverse Proxy: How to Fix Unrealistic Upload Speeds with OpenSpeedTest

[eiger8]

Version: latest docker image

Environment:
Browser: Safari & Chrome
Backend: Synology Docker

Description:
The Openspeedtest Dashboard's UI is displaying incorrect upload speed measurements. While the download speed appears to be accurate, the upload speed is consistently showing a value that is much higher than expected.

Steps to Reproduce:
Open the Openspeedtest.
Initiate a speed test.

Expected Result:
The upload speed displayed on the Openspeedtest Dashboard should be consistent with download benchmark.

Actual Result:
The upload speed displayed is much higher than the actual speed measured by download benchmark.

[openspeedtest]

follow #91

DS920-1Gbps-.mp4

[eiger8]

when using the IP it is showing correct values, as shown on the video. but with DSM's Reverse Proxy it is showing incorrect values even with client_max_body_size set to 10000M

[openspeedtest]

Putting the source and destination in HTTP will fix this issue. HTTP/2 is the problem here. You need to handle the upload as we mentioned here, or disable HTTP/2.

[openspeedtest]

Disable HTTP/2 if you need speedtest to work on HTTPS. For HTTP, you don't need to disable HTTP/2.

[eiger8]

Putting the source and destination in HTTP will fix this issue. HTTP/2 is the problem here. You need to handle the upload as we mentioned here, or disable HTTP/2.

thanks! this solution was helpful! we can consider this as a working workaround for those facing this issue.