I configured the UTM to block devices from accessing the internet with a firewall rule and a Source MAC address list.
This setup worked for me, but now I have enabled the transparent web proxy my firewall rule does not seem to work.
Rulz(A must read) explains why it is not working after enabling the proxy.
Rule #2:
In general, a packet arriving at an interface is handled only by one of the following, in order: DNATs first, then VPNs and Proxies and, finally, manual Routes and Firewall rules.
So what I want to achieve is to block devices by their MAC address from accessing the internet, while also using the transparent proxy. Does any
ideas on how this can be done?
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