iron box: [UNIX/Internet] n. A special environment set up to trap a {cracker} logging in over remote connections long enough to be traced.

:iron box: [UNIX/Internet] n. A special environment set up to trap
a {cracker} logging in over remote connections long enough to be
traced. May include a modified {shell} restricting the cracker's
movements in unobvious ways, and `bait' files designed to keep
him interested and logged on. See also {back door},
{firewall machine}, {Venus flytrap}, and Clifford Stoll's
account in "{The Cuckoo's Egg}" of how he made and used
one (see the Bibliography in appendix C). Compare {padded
cell}.
-- The AI Hackers Dictionary