Hello,
thanks for your quick reply.
Enabled blades are firewall and IPSec VPN
traffic going over the specific firewall are only some small http/xml messages a couple times an hour.
in combination with logs which are being sent over to our central management + some monitoring traffic (snmp + ping) and opening the webgui of the firewall for example our line provider can see that their internetline is at a 100% full usage, which sometimes causes a small interruption.
So in my opinion a minimum amount of bandwith is needed on the internet line to make sure all traffic is working.
Firewall itself has indeed probably no minimum bandwith, but question is actually how big the internet line should be to get everything working.