3Com 3CR16110-95-US User Guide - Page 15

Feedback about this User Guide 15 RADIUS - Remote Authentication Dial-in User Service. RADIUS enables network administrators to effectively deploy and manage VPN Client based remote users. The RADIUS server allows multiple users to share a single Group Security Association but require an additional unique password for accounting and access. SYN Flood - A type of DoS attack. This is where a client opens a connection with a server but does not complete it. If the server queue fills up with partially-open connections, no other clients can make genuine connections to that server. UTC -stands for Universal Time Co-ordinated, and is the standard time common to all places in the world. It is also commonly referred to as GMT or World Time. VPN - stands for Virtual Private Network, and is a method of networking that uses data encryption and the public internet to provide secure communications between sites without incurring the expense of leased lines. Web Site Filter - Used in this guide to refer to the SuperStack 3 Web Site Filter. See Chapter 13, "Types of Attack and Firewall Defences" for further information on types of attack and how the Firewall defends against them. Feedback about this User Guide Your suggestions are very important to us. They will help make our documentation more useful to you. Please e-mail comments about this document to 3Com at: [email protected] Please include the following information when commenting: I Document title I Document part number (on the title page) I Page number (if appropriate) Example: I SuperStack 3 Firewall User Guide