@rajeev.tripathi, are you also seeing the ERR_CONNECTION_RESET when the user's browser loads the vendors.bundle.dll.js?
If so, please run curl -so /dev/null http://localhost:5601/built_assets/dlls/vendors.bundle.dll.js -w '%{size_download}' from the server that is running Kibana and the equivalent curl command "substituting the host and port" from the computer that you're trying to access Kibana from. If you could share the output of both of these commands here, it'll help us diagnose further.