The Speed test could not run. Code 1003

When I test ‘Speed’ button, the dashboard shows ’ The Speed test could not run.’

and

6

but server log shows CF visit / root correctly, and there’s nothing in nginx error log:

real_IP:[2606:4700:1101:0:9a0e:ffba:d068:82c7], proxy_CDN_IP:[162.158.106.121] - - [20/Dec/2019:05:39:42 +0000] “GET / HTTP/1.1” 200 31 “-” “Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/78.0.3904.108 Safari/537.36 (compatible; Cloudflare SpeedTest/1.0; +https://blog.cloudflare.com/new-speed-page/)” “2606:4700:1101:0:9a0e:ffba:d068:82c7”

and here is nethogs log:
PID USER PROGRAM DEV SENT RECEIVED
? root 162.158.106.121:18098-nginx service docker ipv4 address:443 0.000 2.109 KB/sec
? root nginx service docker ipv4 address:443-162.158.106.121:18098 0.000 1.145 KB/sec
? root my server public ipv4 address:443-162.158.106.121:18098

I disabled ipv6 support in my server by using:

net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1

in /etc/sysctl.conf

/ page works fine

anyone came up with this error code 1003?

OK, finally I realized that I blocked user-agent like ‘go-http’ in CF firewall. That makes CF speed test can’t be run. Case closed.

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