Ships need to be disabled before they can be raided, so normal traps somewhat protect against the raid already. So preventing the raider from raiding for 2 hrs (like Firewall) can be a bit dry. How about some special effect, like:

toxic gas - intoxicates the raider crew to become vulnerable in raids; any raid against the intoxicated crew is always critical for the duration of 2 hours. The intoxicated crew suffer increased chance of critical failure when attempting raids on other ships.