This trap makes sense but is not implemented fairly based on comparable traps.
Krionus Virus wears off much quicker and can be avoided like Omnicron Mine trap. Quantum Firewall is instant, 1st click, and lasts 2 hours.

Quantum Firewall trap needs to have a much shorter duration, say 30 mins, or have the possibility of being defeated/avoided.

this trap has been complained about many times. my favorite proposal is it gives the player a scan-vs-player boost so they cant be hacked by anyone over the course of 2 hours. that way the hacker isnt open for 2 hours, and that way the player has a chance to fend off a hacking onslaught.

+1 to fending off a hacking onslaught :-3