IIS 7 and Above
Application Request Routing (ARR)
Help needed with 502.6 error
Re: Help needed with 502.6 error
Jul 17, 2020 03:41 AM|Yuk Ding|LINK
We can't find much document about how to fix 502.6. So we need to enable both failed request tracing and etl log to trace winhttp and winet.
The way to capture etl would looks like this
logman create trace "winhttp" -ow -o winhttp.etl -p "Microsoft-Windows-WinHttp" 0xffffffffffffffff 0xff -nb 16 16 -bs 1024 -mode Circular -f bincirc -max 4096 -ets
ECHO Reproduce your issue and enter any key to stop tracing
logman stop "wininet" -ets
However, it require network monitor or dedicated software to review these logs. So if this issue is making business impact, you can open a support ticket to involve professional support engineer.