I have 2 cites and both sides has astaro hardware firewall v7.
I configured on the astaro city one(HQ)site-to-site VPN and the other City(our branch-1) too. They nearly one year worked witout Problem But sudennly something happend and stop connection between HQ and OUR BRANCH-1. 2 weeks ago both sites started sometimes lose connections .NOW NO MORE CONNECTIONS ANY MORE.
when lose connections then i look HQ astaro admin page->site-to-site VPN
site-to-site VPN our_Branch-1the status RED.
But IPSec section is Green.
any idea please?