Another Problem with the up2date of an HA Pair is that the Slave updates directly from the Internet.
The upload of the up2date-Package to the Master is only for the Master not for the Slave. So if your UTM is not directly connected to the Internet you may have a Problem.
A Firewallrule wich allows the Contact from the UTM to the Astaro/Sophos Update Servers is not enough, it seems there are Servers with dynamic Names/adresses in the Cloud wich have to be allowed to.
Another Problem with the up2date of an HA Pair is that the Slave updates directly from the Internet.
The upload of the up2date-Package to the Master is only for the Master not for the Slave. So if your UTM is not directly connected to the Internet you may have a Problem.
A Firewallrule wich allows the Contact from the UTM to the Astaro/Sophos Update Servers is not enough, it seems there are Servers with dynamic Names/adresses in the Cloud wich have to be allowed to.