Shaker your IP has been banned for one reason or another.
You can run the caUtils command to clear-bans, or the ban will expire after some time. However, whatever caused the ban might just ban you again.
I have just today logged an issue with the ban hammer plugin that is blocking people simply because they have tried accessing the site on the same IP but different devices.
https://github.com/collectiveaccess/pawtucket2/issues/155
A couple options:
- Disable the blocking in your themes ban_hammer.conf file.
- Whitelist your IP.