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[GH-ISSUE #5178] Throttled upload speeds with OpenSpeedTest via Nginx Proxy Manager #3134

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opened 2026-02-26 07:37:56 +03:00 by kerem · 2 comments

kerem commented

2026-02-26 07:37:56 +03:00

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Originally created by @creativezane on GitHub (Jan 16, 2026).
Original GitHub issue: https://github.com/NginxProxyManager/nginx-proxy-manager/issues/5178

Hi, I am convinced that NPM is responsible for slow upload speeds for OpenSpeedTest.

Please see my current settings and the speedtest results accessing via NPM and via direct IP:Port.

Originally created by @creativezane on GitHub (Jan 16, 2026). Original GitHub issue: https://github.com/NginxProxyManager/nginx-proxy-manager/issues/5178 Hi, I am convinced that NPM is responsible for slow upload speeds for OpenSpeedTest. Please see my current settings and the speedtest results accessing via NPM and via direct IP:Port. <img width="1312" height="488" alt="Image" src="https://github.com/user-attachments/assets/631c2062-0578-4a7d-ab9d-5bd0737e08ee" /> <img width="1832" height="1527" alt="Image" src="https://github.com/user-attachments/assets/20ec4b90-461a-4743-a48a-ae5092f4ccbe" /> <img width="1788" height="1483" alt="Image" src="https://github.com/user-attachments/assets/053c3227-f739-492a-84d7-a134538c0e1c" />

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2026-02-26 07:37:56 +03:00

kerem commented

2026-02-26 07:37:56 +03:00

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@WoBBeLnl commented on GitHub (Jan 16, 2026):

Have you changed the POST size as noted by openspeedtest?

"Warning! If you run it behind a reverse proxy, you should increase the POST body content length to 35 megabytes or more."

Not sure if this affects the slower download.

@WoBBeLnl commented on GitHub (Jan 16, 2026): Have you changed the POST size as noted by openspeedtest? "Warning! If you run it behind [a reverse proxy](https://github.com/openspeedtest/Speed-Test/issues/4#issuecomment-1229157193), you should increase the POST body content length to 35 megabytes or more." Not sure if this affects the slower download.

kerem commented

2026-02-26 07:37:56 +03:00

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@creativezane commented on GitHub (Jan 17, 2026):

Have you changed the POST size as noted by openspeedtest?

"Warning! If you run it behind a reverse proxy, you should increase the POST body content length to 35 megabytes or more."

Not sure if this affects the slower download.

Yes, I have tried basically everything. Please see below.

@creativezane commented on GitHub (Jan 17, 2026): > Have you changed the POST size as noted by openspeedtest? > > "Warning! If you run it behind [a reverse proxy](https://github.com/openspeedtest/Speed-Test/issues/4#issuecomment-1229157193), you should increase the POST body content length to 35 megabytes or more." > > Not sure if this affects the slower download. Yes, I have tried basically everything. Please see below. <img width="547" height="638" alt="Image" src="https://github.com/user-attachments/assets/0b8e1605-247e-4895-b9cc-6c3c43342e1b" />

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