We had problems in work with Chrome intermittently failing or slow to connect to G-mail and other sites. I found this is down to an experimental QUIC transport layer protocol in Chrome.
Finding and disabling QUIC in Chrome by typing:
chrome://flags
into’s Chrome’s URL bar and hitting return should have you browsing the internet the way Chrome originally intended…
It doesn’t seem to be a problem if you have a direct connection to the internet (home user) but if Chrome’s throwing hissy fit’s when connecting to sites it’s worth a try disabling it.
You may also need to set the flag again if Chrome updates in the background or you update manually.