Description of problem: Firewall's often include rules that define allows / blocks based on subnet. For example, I may wish anything on the same subnet as my adapter to access port 80, but not outside of the subnet. On a routed network, I may wish to only allow a seperate subnet to access something, IE allowing a monitoring VLAN access to SNMP for example. This amounts to two features 1) Create a rule that allows traffic only from the subnet of the adapter to this port in this zone. 2) Create a rule that allows traffic from a user defined subnet to adapters of this zone. The difference being 1 auto-detects the subnet from the adapter, the second is set by the administrator.
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Please have a look at rich rules. It has source and destination addresses and address ranges in the rules. You can also bind source addresses and address ranges to zones.
Yes these provide what I need, but in general firewalld is much harder to "achieve" the same as what iptables allows. Commands with lots of -- in them certainly makes typing them out difficult (Fixing that alone would make my life easier!).