WordPress and blocked IP

For the past few weeks I have been developing a web site using WordPress.  Every so often, when I go to save my work, nothing moves for awhile and then I get a connect error message.  The host support people think that something in Norton 360 is sending something to the host server making that think I am trying to login with an invalid login and/or password. The host server then blocks my IP address.  At their suggestion I turned off Auto-Protect while working on the site.  The problem still occurred.  Any ideas if Norton 360 is involved? 

Thank you.