If anyone 'attacks' an IL internet site: send a virus back in defense. Whats the hold up!?

No Goverment owned hacker group will launch attack from their own network. They use for it dummy networks that do not realize that they have been compromised. While it is still possible to figure out from which country attack order came from, only few intelligence serivices in the world can pinpoint actual location of professional hackers. Without precise target, bombing virus left and right in countries like US, Russia, China and South Korea is beyond stupid.

...with limited, controlled, secure entry points to the internal network.

maybe someone could explain to me why the iec critical infrastructure has to be connected to the world wide web. private fibre optic cables between different sites would stop the attacks in one day . its not like part of the job is having to read ynet everyday

main computer system, get more portals.

Unless you have about 20-40 Million US$ to burn (and it won't last you for very long) .... don't expect to be able to find out who to target back at! Many hackers are well funded themselves....are not stupid, and are re-directing their attacks from compromised systems in a 3rd country! Going to be much cheaper for IEC to develop secure and ISOLATED systems, specifically for all their SCADA based solutions which (in my opinion) will pose the biggest risk.

Why can't vital Israeli systems that must be interlocked to exchange information , and control: use private fibre optic links between stations, to eliminate the possibility of unwanted interference ? Seems to be obvious that the distance between stations within Israel make such a defensive network EASY to build ! moshe