Same as Erwin: First the DNS server of the ISP (which I have as an IP number), because it allows me to check if I have a connection even if I don't have a proper DNS setup.
Maybe the connection is broken from the ISP to the greater Net, then this test should still respond.
Then doing a dig to see if DNS works. Then pinging betabug.ch which is a poor choice since it's my own server and may be down too.
Comment
Same as Erwin: First the DNS server of the ISP (which I have as an IP number), because it allows me to check if I have a connection even if I don't have a proper DNS setup.
Maybe the connection is broken from the ISP to the greater Net, then this test should still respond.
Then doing a dig to see if DNS works. Then pinging betabug.ch which is a poor choice since it's my own server and may be down too.