DD-WRT, OpenVPN, Policy Based Routing, Excluding IPs/Netflix

These are just notes to use policy based routing when I decide to do so.

hopefully sometime in future setup rules to

  • send all traffic through vpn except for a couple of ips
  • send all traffic through vpn except for certain destinations like maybe netflix

related links to lookup

just random notes from looking at different posts:

  • openvpn adds rules new table ‘table 10’
  • ssh to the router and /tmp/openvpncl – has all the files
    • policy_ips has the ips we list in the ui
    • route_up.sh is the script that sets up the route table 10 and the routes for the ips
  • essentially routes will have to setup and/or firewall rules will have to be setup
  • routing
    • From the Linux networking help pages (http://linux-ip.net/html/routing-tables.html) found that there could be other routing tables other than main and the tables will be under /etc/iproute2/rt_tables. this is not present in the ddwrt. I couldn’t find a command that will list the different routing tables or where they are specified in dd-wrt.
    • “ip route” or “ip route show” lists all the routes from the main routing table
    • finally while looking at the help realized “ip route show table all” – will list the routes from all the tables, this is how i was able to see table 10 added by openvpn
    • ip rule list will show the different rules
    • you can also you “netstat -rn” to look at the rules (this will show the tun1 interface) and iptables to look at the firewall rules, “iptables -L” will list all the firewall rules