Hi all,
It's been a while since I've worked over a VPN and I'm wondering how secure can one be made? I've never heard of anyone hacking into a server with VPN access, but then again, there are lots of things I've never heard of! Is there a consensus on actual VPN security?

In theory anything is hackable, but have there been many problems so far in the real world with patched, up to date systems?

Thanks in advance,

Gary