Greynet (or graynet) Definition
Posted by: Margaret
Rouse
Greynet is a term for the use of unauthorized
applications on a corporate network. A greynet application is a network-based
program that corporate network users download and install without permission
from their company's IT department. Common examples of greynet applications
include instant messaging, peer-to-peer collaboration and conferencing
programs, streaming media players, and RSS readers.
Many greynet applications, such as instant messaging and
collaboration programs, have legitimate business use and help boost user
productivity. Other greynet applications, like peer-to-peer file and music
sharing programs, pose serious security risks and can drain network resources.
User-downloaded programs also can include malicious programs like spyware components for tracking and
reporting information without the user's knowledge. Greynet usage by employees
is thought to be a major contributor to the growth of spyware-related
incidents.
All greynets, even those that benefit the end-user, can
be detrimental to a company network. Because they use corporate bandwidth, the programs often have negative
effects on overall network performance. They introduce security risks,
including client code vulnerabilities and new avenues for attack, and can lead
to data loss and property or identity theft. Greynets can be difficult
to eliminate because many use encryption and port agility (the ability to
dynamically send and receive traffic across any open network port), which makes them difficult to detect
and block.
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