Thanks for the kind words,
@yossigab.
@Famine is on the right track. You're basically seeing this error because your browser is trying to connect to what it
thinks is "gtplanet.net", but the server that is actually responding does not have the correct security certificate (because it's not GTPlanet!), so your browser shows you that error page. This usually happens because, as Famine mentioned, you have to sign in or authenticate your browsing session with your network provider. It's very common with hotels or other public wifi networks, and can affect any website which forces you to connect to it securely, via "HTTPS", like GTPlanet does (that's what the HSTS means).
One quick fix — and this should be useful to everyone, if you don't know it already — is to simply visit a site that does not use HTTPS, like
msn.com. Because it does not require the browser to authenticate the server against its security certificate before allowing you to continue, it can forward you to the network's authentication page instead. Once you are authenticated with the network, you can browse all sites like normal.
If that does not work, you will have to ask your company's IT department for assistance. There is no problem with GTPlanet's security certificate and, despite the message that you see, our site is secure (actually, the reason you are seeing the error message is
because our site is secure).
