We have a public website developed using Oracle APEX which uses Tomcat. The site runs on a Windows 2016 server and is behind a wildacrd ssl. A few users reported Chromium browsers (Chrome & Edge) were having a problem connecting to the site. The error displayed is "ERR_CONNECTION_RESET".
When run from IE of Firefox the site works fine. Many Chromium browsers also work fine. We discovered internally some of our Chrome & Edge browser work, and some don't.
Troubleshooting steps we've taken so far include;
- F12 on chrome. The error which displays is "crbug/1173575, non-JS module files deprecated." When searching for these issues the only thing found is a reference to launch.json which seems .NET related and this is a Tomcat application.
- Run Fiddler. When enabling Fiddler on the client using Fiddler's builtin proxy the site works fine.
- Try different SSL certificate. We have tried two different wildcard SSLs neither work. We tried single SSL and the Chrome/Edge browsers which didn't work, started working.
- Run SSL diagnostic tools. Everything tried thus far show the SSL to be in good shape. With only TLS 1.2 allowed.
- Verified versions of browsers and OSes which work & don't work. Found no pattern.
- Ran cleanup on Chrome.
- Tried a computer with a non-working browser on different networks.
At this point we do not what to try next. Which is why I am asking for help here.
I will update this question as we try additional steps.
