1. The code you put in a system (say, a telephone switch) to make sure that the users can’t do any damage. Since users always want to be able to do everything but never want to suffer for any mistakes, the construction of a firewall is a question not only of defensive coding but also of interface presentation, so that users don’t even get curious about those corners of a system where they can burn themselves.
2. Any sanity check inserted to catch a can’t happen error. Wise programmers often change code to fix a bug twice: once to fix the bug, and once to insert a firewall which would have arrested the bug before it did quite as much damage.
- Firewall machine
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 […]
[fahyuh r-wawr-dn] /ˈfaɪərˌwɔr dn/ noun 1. a person having authority in the prevention or extinguishing of , as in towns or camps. /ˈfaɪəˌwɔːdən/ noun 1. (US & Canadian) an officer responsible for fire prevention and control in an area, esp in a forest
- Fire watcher
noun 1. a person who watches for fires, esp those caused by aerial bombardment
[fahyuh r-waw-ter, -wot-er] /ˈfaɪərˌwɔ tər, -ˌwɒt ər/ noun 1. alcoholic drink; liquor. /ˈfaɪəˌwɔːtə/ noun 1. any strong spirit, esp whisky n. “alcoholic liquor,” 1826, American English, supposedly from American Indians, from fire (n.) + water (n.). noun Liquor; booze [1826+; the term is attributed to North American Indians]