RHL-410
RED HAT LINUX NETWORK SECURITY

This extremely popular class focuses on network security, and makes an excellent companion class to the GL550: Enterprise Linux Security Administration course. After a detailed discussion of the TCP/IP suite component protocols and Ethernet operation, the student practices using various tools to capture, analyze, and generate IP traffic. Students then explore the tools and techniques used to exploit protocol weaknesses and perform more advanced network attacks. After building a thorough understanding of network based attacks, course focus shifts to the defensive solutions available. Students install, configure, and test one of the most popular and powerful NIDS solutions available. Finally, students create a Linux based router / firewall solution, including advanced functionality such as NAT, policy routing, and traffic shaping.

Prerequisites: Since the tools used in class are compiled and run on a Linux system, Linux or UNIX system experience is helpful, but not necessary. A solid background in networking concepts will greatly aid incomprehension. This is an intense class that covers many topics.

Ethernet and IP Operation

·          OSI Network Model

·          Application Layers

·          Network Services Layers

·          Moving Data Through the Stack

·          Data Link Layer Format

·          Ethernet Operation

·          Hug and Switch Operation

·          Ethernet Security Issues

·          Detecting Promiscuous NICs

·          Network Packet Capture

·          tcpdump

·          Ethereal

·          IPv4

·          IP Addressing Differentiated Services

·          IP Fragmentation

·          Path MTU Discovery

·          ARP

·          ICMP
ICMP Redirects

·          Important ICMP Messages

·          ICMP Security Issues

·          Protecting Against ICMP Abuse

IP and ARP Vulnerability Analysis

·          IP security Issues

·          IP Routing

·          Routing Protocol Security

·          Protecting Against IP Abuse

·          ARP Security Issues

·          Cache Poisoning with ARP Replies

·          Cache Poisoning with ARP Requests

·          ARP Cache Poisoning Defense

UDP/TCP Protocol and TELNET Vulnerability Analysis

·          User Datagram Protocol

·          UDP Segment Format

·          Transmission Control Protocol

·          TCP Segment Format

·          TCP Port Numbers

·          TCP Sequence/ Acknowledgement #’s

·          TCP Three-way Handshake

·          TCP Window Size

·          The TCP State Machine

·          TCP Connection Termination

·          TCP SYN Attack

·          TCP Sequence Guessing

·          TCP Connection Hijacking

·          Telnet

·          Telnet Concepts-Options

·          Telnet Concepts-Commands

·          Telnet Security Concerns

FTP and HTTP Vulnerability Analysis

·          FTP

·          Modes

·          Transfer Methods

·          Security Concerns

·          The Bounce Attack

·          Minimizing Risk

·          FTP-Port Stealing

·          Brute-force Attacks

·          Access Restriction

·          Privacy

·          HTTPv1.1

·          HTTP Protocol Parameters

·          HTTP Message

·          HTTP Request/Method Definitions

·          Response/Status Codes

·          Proxies

·          Authentication

·          Security Concerns

·          Personal Information

·          Attacks On File and Path Names

·          Header Spoofing

·          Auth Credentials and Idle Clients

·          Proxy Servers

DNS Protocol Vulnerability Analysis

·          DNS

·          DNS Basic Concepts and Terms

·          DNS Resolution

·          DNS Zone Transfers

·          DNS Spoofing

·          DNS Cache Poisoning

·          DNS Security Improvements

SSH and HTTPS Protocol Vulnerability Analysis

·          SSH Concepts

·          Initial Connection

·          Protocols

·          SSH1

·          SSH2

·          Encryptions Vulnerabilities

·          SSH1 Insertion Attack

·          SSH Brute Force Attack

·          SSH1 CRC Compensation Attack

·          Bleichenbacher Oracle

·          SSH1 Session Key Recovery

·          Client Authentication Forwarding

·          Host Authentication Bypass

·          X Session Forwarding

·          HTTPS Protocol Analysis

·          SSL Enabled Protocols

·          SSL protocol

·          SSL Layers

·          The SSL Handshake

·          SSL Vulnerabilities

·          Intercepted Change Cipher Spec

·          Intercepted Key Exchange

·          Version Rollback Attack

Remote Operating System Detection

·          OS Detection

·          Banners

·          Commands

·          Less-direct Approaches

·          TCP/IP Stack Fingerprinting

·          Remote Fingerprinting Apps

·          nmap

Attacks and Basic Attack Detection

·          Sources of Attack

·          Denial-of-Service Attacks

·          Methods of Intrusion

·          Exploit Software Bugs

·          Exploit System Configuration

·          Exploit Design Flaws

·          Password Cracking

·          Typical Intrusion Scenario

·          Intrusion Detection

·          IDS Considerations Attack Detection Tools

·          Klaxon

·          PortSentry

·          PortSentry Design

·          Snort

Intrusion Detection Technologies

·          Intrusion Detection Systems

·          Host Based IDS

·          Network Based IDS

·          Network Node IDS

·          File Integrity Checkers

·          Hybrid NIDS

·          Honeypots

·          Focused monitors

·          Snort Architectures

·          Snort Detection Rules

·          Snort Logs and Alerts

·          Snort rules

Advanced Snort Configuration

·          Advanced snort Features

·          Snort Add-ons

·          ACID Web Console

·          The ACID Interface

·          SnortCenter Management

Snort Rules

·          Snort Rules Format

·          Snort Rules Options

·          Writing Snort Rules

·          Example Rules

Linux and Static Routing

·          Linux As a Router

·          Linux Router Minimum Requirements

·          Router Focused Distributions

·          Router Specific Settings