<networking> A dedicated gateway machine with special security
precautions on it, used to service outside network, especially Internet,
connections and dial-in lines. The idea is to protect a cluster of more loosely
administered machines hidden behind it from crackers. The typical firewall is an
inexpensive microprocessor-based Unix machine with no critical data, with modems
and public network ports on it, but just one carefully watched connection back
to the rest of the cluster. The special precautions may include threat
monitoring, call-back, and even a complete iron box keyable to particular
incoming IDs or activity patterns.
Firewalls often run proxy gateways.
Synonym flytrap, Venus flytrap.
firehose syndrome « firewall « firewall code «
firewall machine » FireWire » fireworks mode »