Remote phones blocked by s series firewall

I have remote phones that are continually blocked by the firewall whenever there is a power outage. When I delete the auto defense they reconnect. All phones are provisioned with mac address but continue to get blocked. I would think that if the mac address is entered to allow them through they would always be allowed to connect no matter what inbound ip address they come from. Any suggestions to stop this from happening?


Please sign in to leave a comment.