I finally have a config that works for my needs. Since 99.9% of the traffic I wanted to route through the VPN comes from one IP I just routed all it's traffic to the VPN port and then added a couple ports to be sent over the the regular wan connection. Seems to be working well so far.
Now what I want to figure out is putting in some kind of kill switch to counter the VPN route IF the VPN loses it's connection. For some reason nothing I try seems to work though. Maybe someone can have a look at my config and tell me how I might be able to accomplish this?
Here's my config:
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ip route flush table 10
ip route del default table 10
ip rule del fwmark 10 table 10
ip route flush table 12
ip route del default table 12
ip rule del fwmark 12 table 12
ip route flush cache
iptables -t mangle -F PREROUTING
tun_if="tun11"
tun_ip=$(ifconfig $tun_if | grep 'inet addr:'| cut -d: -f2 | awk '{ print $1}')
ip route add default via $tun_ip dev $tun_if table 10
ip rule add fwmark 10 table 10
ip route add default via $(nvram get wan0_gateway) dev eth0 table 12
ip rule add fwmark 12 table 12
echo 0 > /proc/sys/net/ipv4/conf/$tun_if/rp_filter
iptables -t mangle -A PREROUTING -i br0 -s 192.168.1.100 -j MARK --set-mark 10
iptables -t mangle -A PREROUTING -i br0 -p tcp --dport 563 -j MARK --set-mark 12
iptables -t mangle -A PREROUTING -i br0 -p tcp --dport 32400 -j MARK --set-mark 12
exit
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Many thanks to whoever originally posted this method for routing, BTW.
