I’m running Slackware Linux 13.1 x86 and I use wicd to work my net connections and when I put in Comodo’s Secure DNS to use I can’t surf. I can only surf if I use my ISP DNS.
Since you are using a free account, you can not use Comodo Secure DNS directly. You may use them if you add the route to Comodo Secure DNS via your default gateway. To do this, add in free_client.conf the following:
route 156.154.70.22 255.255.255.255 net_gateway
route 156.154.71.22 255.255.255.255 net_gateway
where net_gateway - the pre-defined constant, which means in terms of openVPN-client the network default gateway.