I'm using OSX Mavericks at the moment. Looking through VPN options (L2TP in my case), I see that it is possible to "Send all traffic over VPN connection".
However, I cannot figure out if I don't click it, what traffic goes through the VPN connection and what doesn't? Can I specify this? And if I do click it, does it mean that even local subnet traffic goes through this VPN connection?
More generally, I'm really trying to figure out what this checkbox means.