Wolf - I was just playing with the whole HSRP/VLAN/OSPF thing, none of it is possible without 10K in hardware or many sleepless nights compiling the latest Linux Kernel and configuring your brains out in both locations.
Network security always needs prospective. The following are some considerations
1) How important is the data on the network?
2) If access is gained how much damage can be caused?
3) How many perimeters can you afford create internally?
I’ve worked on some of the world’s most secure networks and the common theme is zones or secure networks with-in the larger internal network. Most large companies even if you were able to get on main internal network it would take another one to two security breaches of additional networks to do any bottom line effecting damage. The federal government also has proprietary OS and network protocols that require inside knowledge to even function.
The moral of the story here is do you were a bullet proof vest and Kevlar helmet and drive a bullet proof car to work everyday? Most just say “if it’s your time to go…” and go along their marry way. Computer security is much the same, just make it difficult to be ‘Cracked’ (hacked is not really the correct term) then mitigate and understand the risk and worry about issues you can control, like what you’re going to smoke next.