Add static route in Smoothwall
Firstly, edit the file /etc/rc.d/rc.netaddress.upAbove the 'echo "setting up firewall ……."', add:
/sbin route add -net destination netmask subnetmask gw gateway devdeviceinterface
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Edit /etc/rc.d/rc.firewall.upAfter the section on "# Allow packets that we know about through …"
Add:
# Allow packets from green to green
/sbin/iptables -A FORWARD -i $GREEN_DEV -o $GREEN_DEV -j ACCEPT