I am getting "WP HTTP Error: Failed to connect to planet.wordpress.org port 443: Connection timed out" on the dashboard. "An unexpected error occurred. Something may be wrong with WordPress.org or this server’s configuration. If you continue to have problems, please try the support forums.
Try again" - when going the ad plugins.
"Your server had a problem connecting to WPMU DEV: "Connection timed out after 15000 milliseconds". Please try again." - when trying to sign in.
I lost access to most of the site earlier in the week and was able to access it again when I removed the events+ plugin.