Security Solutions

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Appendix A: Glossary

Xauth eXtended authentication. An IKE extension that permits the use of legacy

protocols such as RADIUS, SecurID, and OTP. For more information, see the

Internet Draft at http://www.vpnc.org/ietf-xauth/draft-beaulieu-ike-xauth-

02.txt.

Xsupplicant An 802.1X supplicant developed by the Open1X project that runs on Linux

platforms that permits authentication to a RADUIS server and use of the EAP

protocols. For more information, see http://open1x.sourceforge.net.

zero-day attack An attack of any sort that exploits a vulnerability that has not yet been

officially discovered and patched. Because systems are not protected from

zero-day attacks, these attacks can aggressively propagate throughout the

world in a matter of hours. Zero-day attacks consume incredible amounts of

network resources when propagating and can use unique code that most

antivirus software does not detect.