Our domain (https://bit.ly/nnmainb) along with subdomains are used to host news sites on Wordpress platform.for many years.
For the past 3-4 days, we have been receiving connection reset/timeout error blank page in both Chrome (ERR_CONNECTION_RESET or ERR_TIMED_OUT) and Firefox for this domain along with subdomains. We get the sites good sometimes, but most of the time we get blank page with connection reset/timeout message. This is happening in Bangladesh only as we can browse smoothly from other countries through VPN and haven’t encountered such thing in the past.
The other domains (i.e. http://bit.ly/wednsen) have no problem, hosted in the same server with Nginx, PHP 7.4 and MariaDB.
For all our domains, we use HSTS, Free CloudFlare DNS (proxied) only (without caching or other security features of CF).
We have tried all the troubleshooting methods like creating html sites with new sub domains of the problem domain and making another fresh Webserver but the result is same. Ping and traceout from WinMTR is 100% loss.
We are really very confused after searching extensively without solution. Will highly appreciate your advice/direction to troubleshoot and solve.
Free proxy lists to test: