For some reason, TunnelBlick started killing my internet entirely when I try to connect via OpenVPN to my remote NAS. After a lot of troubleshooting, it seems TunnelBlick is assuming I want to use the OpenVPN connection for all internet. I couldn't figure out a way to stop this from happening, except for adding these to the configuration:
route 0.0.0.0 192.0.0.0 net_gateway
route 64.0.0.0 192.0.0.0 net_gateway
route 128.0.0.0 192.0.0.0 net_gateway
route 192.0.0.0 192.0.0.0 net_gateway
However, is there a way to *only* use the specific IP of the NAS for the VPN connection? I ask because enabling my PrivateInternetAccess causes my internet to die, since I believe it's reading the PIA IP rather than the local network IP, and therefore doesn't follow the custom gateway routing.