I am making an edge-router server from Fedora 20. Now I am stuck on the last step, where I need to forward all non-local packets out to the WAN.
I have four NICS and a bridge on this server. All are defined in /etc/sysconfig/network-scripts/ifcfg-*. Only lan0 and wan0 use NetworkManager.

wan0 -> internet. Defined in ifcfg-wan0. Gets ip via dhcp
lan0 -> Local network. Defined in ifcfg-lan0. No IP, bridged to br0.
br0-> Local network. Defined in ifcfg-br0. Static IP (192.168.0.xxx).
wifi0-> Local network. Defined in ifcfg-wifi0. Managed via hostapd. Bridged to br0
wifi1-> Local network. Defined in ifcfg-wifi1. Managed via hostapd. Bridges to br0

For testing, I defined a gateway in /etc/sysconfig/network, as is recommended by RedHat. But this machine will BE the gateway, and the external IP is dynamic. I therefore removed it, but should it be GATEWAY=127.0.0.1?
After boot I can manually execute

ip route change default via XXX.XXX.XXX.XXX dev wan0

But I obviously need this to be set automatically. How do I do that?
Thanks!
PS. This machine uses iptables and NAT to direct the traffic of other hosts on my network to the WAN. The bridge is for hostapd WIFI.

The dhcp server should push the gateway definition along with the IP and netmask. You want to let your dhcp client set the gateway.

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