Dear all,
I just recently installed the Sophos UTM 9. I have one "External (WAN)" Interface and several internal interfaces.
I had setup a firewall rule for each internal interface with any to External (WAN) (Network) and this mainly worked fine with one exception:
The internal network my son is on with the same firewall rule as above did block his applications like TeamSpeak and Steem.
When I changed the firewall rule for his network to:
Internal Son -> any -> Internet IPv4 it works fine.
To understand what I am doing and not bypassing the additional security UTM provides, I would like to understand what the difference is between the destination being defined as "Internet IPv4" and "External (WAN) (Network) ?
Thx for you help !!!
Background: The UTM is sitting behind a Fritz.Box Router which does NAT as well.
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