Made from leafy fossil and magic, the power within the golem is stored in a glowing orb. Though having nothing to do with technology you can expect it to be similar to a robotic guard. Those who dabble in magic arts and apothecaries use these guards as security for the labs that hold their experiments. They pay the dwarves a hefty sum to create them, no other knows how or has yet to get hold of any blue prints for one.
If you are looking for reliable protection make a journey to your nearest dwarven dwelling and be sure to take plenty of gold with you.
Once you have your Firewall golem please understand that it is not a maid. A professional and well trained dwarven mechanic will place the golem and only when there is a threat in the area will it activate. Do not expect it to do your laundry or get upset when it doesn't obey commands to sharpen and clean weapons. Each Firewall is guaranteed to last ten generations but may require a magic recharge at least once. If there are any defects or the golem becomes hostile please leave the area and do not confront. Go seek immediate assistance of a dwarven mechanic.
Thank you for your interest and remember to take care of your golem. -Dwarven Technical Magical Support