We have a customer that maintains a Barracuda X100 firewall, and they were suddenly getting “Temporarly Unavailable” when trying to access the web interface. The following article was a help getting us access to the admin console.
After the “/cgi-mod” in the URL we added “/index.cgi?error=3&locale=en_US&primary_tab=ADVANCED&secondary_tab=troubleshooting” ( without the quotes), and hit enter. We could then access the admin panel.
Let us know if this helped you…