OpenVPN sometimes does not forward all traffic to server
I have successfully installed OpenVPN on both my Windows Vista and a VMWare of Windows XP and Ubuntu. I have setup my VPN client to redirect gateway and forward all traffic thru the tunnel. Now, I was just wondering why it is not working all the time. When I do a traceroute to a specific site, sometimes the 1st hop is the VPN gateway and sometimes its my local router's IP address. How can I set it in such a way that it will redirect all traffic thru the tunnel and not use the DNS of my local server? Thanks.