Result
How we measure
A classic ping uses ICMP packets. Because many servers and firewalls now ignore them, we measure the set-up of a TCP connection to web server port 443 or 80 by default – just as a browser would. The result is practical: if the port answers, the service is reachable. No data is transferred.
The response time mainly depends on distance: within Germany a few milliseconds are normal, to North America more like 80 to 120 ms. Fluctuating values or packet loss indicate a congested network.
Frequently asked questions
The server does not answer – is it offline?
Not necessarily. Firewalls often drop probe packets deliberately. For websites, also try the HTTP header check; if it gets an answer, the site is online.
Why only four packets?
Four measurements are enough for a meaningful response time. More packets would put needless load on the target.
Domains and DNS in good hands
1blu business GmbH looks after domains, DNS and mail servers for companies, agencies and resellers – with dedicated contacts instead of a call centre.