No connections work after starting OpenVPN service?

view full story

http://unix.stackexchange.com – I setup my Scientific Linux 6.2 as an OpenVPN client via the instructions here, and restarted my OpenVPN service. I checked /var/log/messages and it says the VPN connection was established. However, now I cannot make any connections out of my computer! Browsing with Firefox gives me "Server not found" errors, and even ping and traceroute don't work (they produce unknown host errors). How can I troubleshoot this issue? BTW, is there a way to route only certain traffic through this VPN (once I get it working), while everything else don't? Thanks! My OpenVPN /etc/openvpn/client.conf looks like (HowTos)