: Why would I only be able to connect to my website from some computers, but not others? I have a really strange problem, it's so strange for me that I cannot deal with it. I was working

@Murray155

This sounds like a server firewall issue. Failed ssh attempts can usually trigger a rule that will then block your IP.

1und1.de has a guide for how to manage their server firewall (I had to use Google Translate to read it). You may be able to log in to your server control panel to whitelist your IP. If not, you could try getting in touch with 1und1.de hosting support.

Vote Up Vote Down

@Megan663

The first thing that I would check is DNS. It sounds like you recently changed your DNS settings and it has not completely propagated yet. When you change DNS settings it may take several days for the changes to fully take effect depending on your time to live (TTL) settings. Some computers will see the new info sooner than others. Computers that have not connected to the website recently (presumably like your wife's devices and your proxy) will get the new information faster because it is less likely to be cached by the DNS server.

Use tools like ping and dig from your various computers and see what IP address each thinks that the website is on. If the values differ, you know that a cached version of the IP address in DNS is the problem.

Vote Up Vote Down