We will be performing network maintenance from 00:00-03:00 UTC on 7 February 2017. As part of this maintenance, we will be reducing the MTU and MSS values on our public-facing resources.
Most users will be unaffected by the MTU and MSS changes. If you begin experiencing trouble with your HTTPS or SSH connections after this maintenance is complete, though, then please see https://confluence.atlassian.com/bbkb/troubleshooting-bitbucket-cloud-mtu-mss-issues-858778091.html
for troubleshooting help.
As always, please contact our support team at support.atlassian.com if you need further assistance.