I watched that as well, at a later point in the episode or it may have been the next episode one of the characters did say that if they knew the IP address they could access the equipment they were trying to access.
Also given in the series they have the power to turn off the internet they also over looked this fact later in the series when it would have helped them
ETA: TV/Films is full of inaccuracy's like this, there is a James Bond film where Bond disconnects the the red air line on an articulated truck, thus in the film stopping the brakes from working
In real life the red airline being disconnected would instantly apply the trailer brakes, however disconnecting the yellow air line would have had the effect they intended albeit only the trailer brakes wouldn't have worked, unless it had EBS then they would still work