Network Security: Recent Episodes
University of Twente
Through following this course, students will gain a basic understanding of the principles behind network security and the working of the main protocols, mechanisms and techniques in the area of security. The course consists of three parts: security mechanisms within network protocols, systems security and lab sessions. In the first part (security mechanisms within network protocols), the following topics will be discussed: IPSec, SSH, SSL, HTTPS and security for wireless networks. The second part (systems security) discusses topics like scans, intrusions, DOS attacks and firewalls. The last part (lab sessions) will have the students perform practical experiments. Some examples of possible practical experiments are listed below: Remote system fingerprinting (such as possible with tools like nmap); Break anonymization (such as on network traces); Break in into dedicated and prepared web-servers, using tools like Cross-site scripting and SQL injection
In this short video we provide some examples of possible security related assignments and projects at the DACS group. The lecture concludes with information regarding the exam.
This lecture discusses two main techniques to protect your network: Intrusion Detection Systems (IDS) and Firewalls. The IDS part discusses host-based versus network-based ID systems, passive versus reactive systems, as well as the main operation of an IDS (data capturing, signature versus anomaly-based operation). The firewall part compares different kind of firewalls: network-level, transport-level as well as application-level firewalls, and discusses stateless versus stateful systems. the lec
In the first part of this lecture we discuss the operation of the SSL/TLS protocol, which is used for secure web browsing (HTTPs), as well as the SSH protocol, which is used, amongst others, for remote login. In the second part of this lecture the concept of AAA (Authentication, Authorization and Access Control) is introduced, followed by a discussion of the basic operation of two important AAA protocols: Radius and Diameter.
In this lecture we will discuss the IPSec protocol. We start with comparing IPSec usage to that of other secure protocols, such as SSH and TLS. An overview of the various IPSec standards is given, followed by a discussion of the two modes in which IPSec can operate: transport mode and tunnel mode. We than provide some details regarding the two variants of IPSec: AH and ESP. The lecture concludes with showing the relationship between IPSec and VPNs, followed by a short discussion on IPSec key man