On 1/18/19 10:34 AM, mark wrote:
Does someone have a link to a how-to-do-it with firewalld, not "disable
firewalld and use iptables"?

Are you trying to filter the packets crossing the bridge device?

If so, you should need three files:

1. /etc/dracut.conf.d/br_netfilter.conf:
   add_drivers+=" br_netfilter"
2. /etc/modprobe.d/br_netfilter.conf:
   softdep bridge post: br_netfilter
3. /etc/sysctl.d/90-br_netfilter.conf:
   # Enable netfilter on bridges.
   net.bridge.bridge-nf-call-ip6tables = 1
   net.bridge.bridge-nf-call-iptables = 1
   net.bridge.bridge-nf-call-arptables = 1

You'll want to rebuild your initrd so that br_netfilter is included and loaded at boot.  From there, filtering the bridge is the same as filtering FORWARD rules, generally (IIRC).

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