1.1 Disappearing Perimeters | Managing Security with Snort and IDS Tools

In the old days (two years ago or so), a firewall was most of what an administrator needed to protect a network from attack. It was easy to establish where your network ended and the Internet began. Technological advances and decreasing costs for wide area network technologies have eroded this concept of a perimeter. VPNs have all but replaced conventional dial-up modem pools. Most users have high-speed DSL or Cable Modem service, and the VPN makes the user feel like he's sitting at his desk. Some VPNs use an appliance that sits on the perimeter of the network and has the capability of controlling how the network is used remotely. While this is a boon for telecommuters, it is a real risk for most networks. A virus or worm-infected system on the user's home network suddenly has unfettered access to the inside of your network. That high-speed highway into your network can allow rapid propagation of an aggressive worm.

Connections to business partners used to be an expensive proposition and were only for the most well-to-do organizations. Dedicated T1 links are expensive. With less expensive network options (not to mention network-to-network VPN connections), this cost has decreased significantly. This allows many organizations to connect their network to yours sometimes directly into the internal network. Without real precautions in place, security problems on the partner networks quickly become security problems on your network very often undetected until much damage is done. Whether you trust your partner to that extent is another matter.

Table of content

Managing Security with Snort and IDS Tools

ISBN: 0596006616
EAN: 2147483647

Year: 2006
Pages: 136

Authors: Christopher Gerg, Kerry J. Cox

BUY ON AMAZON

Cisco IP Telephony (CIPT) (Authorized Self-Study) (2nd Edition)

Network Security Architectures

Developing Tablet PC Applications (Charles River Media Programming)

Cisco CallManager Fundamentals (2nd Edition)

101 Microsoft Visual Basic .NET Applications

The New Solution Selling: The Revolutionary Sales Process That Is Changing the Way People Sell [NEW SOLUTION SELLING 2/E]