Diagnose Internet Connection Problems by Symptom

Choose the problem you see. Each path starts with a real observation and the comparison that helps narrow it down.

Check whether the failure looks device-specific, DNS-related, shared across devices, or limited to particular sites.

Watch this browser’s requests for 60 seconds and see when interruptions are observed. Compare devices and Ethernet to narrow the likely area.

Compare your connection with a server-side website check, then separate one-site problems from wider browsing failures.

Compare two public DNS-over-HTTPS resolvers and a direct-IP HTTPS endpoint, then check whether the issue follows your browser or network.

Measure a bounded download and compare HTTP response times before and during that transfer. Narrow whether the slowdown follows your device or shared connection.

Check the website from our server and your connection from this browser, then compare what works on another network.

A reset tells you a connection was interrupted. Compare the browser, VPN/proxy and website path to choose a useful next step.

Find out whether the timeout affects one website or your wider connection, with each observation tied to its actual test location.

Check hostname spelling and compare public resolver results with the browser error you see.

Packet loss means transmitted network packets did not arrive. Symptoms overlap with other problems, so start with honest observations and useful comparisons.