Isolet is a framework to deploy linux wargames like Bandit. It uses pre-configured templates to provide isolated instance using kubernetes pods for each user.
When the instance time limit is once increased to 5 minutes and the time decreases to less than 4 min, it is no longer possible to increase the limit by even a single minute.
Exiting the instance, upon submission of correct flag could be done.
To prevent brute forcing the flags, certain wrong submission MAX limit could be given which is not made public. And the instance exits out after reaching the limit.