* Add my LAN interface to the internal zone and my WAN interface to the external zone, by adding ZONE= to the appropriate scripts under /etc/sysconfig/network-scripts
* Enable IP forwarding by adding _forward=1 to /etc/sysctl.d/nf and running sudo sysctl -p.
Using Firewalls in the RHEL 7 Security Guide.RHEL7: How to get started with Firewalld.I have no experience with firewalld or iptables but I have looked through these resources: It seems that I would use firewalld for this? I'm having trouble configuring it. For example I'd like a LAN machine to be able to ping a WAN machine. I want machines on my LAN to be able to communicate with machines on the WAN transparently. I'd like to configure my CentOS 7 machine to act as a router between an LAN and a WAN (I have two NICs).
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