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Red Hat Enterprise [RHCE]

The full RHCE curriculum consists of three courses or modules:


RH0253 Red  Hat Linux  networking and security administration



Course Description

RH253 arms students with in-depth knowledge needed for the most essential Red Hat Enterprise Linux network services and access control mechanisms. You will learn how to go from a basic system administrator to a professional with the knowledge to use Linux as part of your more complex services infrastructure. At the end of the course, you’ll be able to set up a Red Hat Enterprise Linux server and configure its network services and security. Through the lectures and hands-on labs, students already familiar with the RHCT competencies will leave with exposure to all competencies tested by the RHCE exam

Linux system administrators who install
configure, and/or maintain networked services
Linux system administrators who want to harden the security of their machines or networked services as well as handle additional security issues  

  • Prerequisites
  • RHCT or equivalent experience  
  • Red Hat Enterprise Linux system administration or equivalent experience  
  • LAN/WAN fundamentals  
  • Internetworking with TCP/IP

Course content

The following is an outline of the skills and knowledge represented in the training
elements of the RH253 Red Hat Linux Networking and Security Administration Course.
Unit 1: System Performance and Security
• Concepts and Practices
• System Faults and Breaches
• Method of Fault Analysis
• Benefits of System Monitoring
• Managing Processes by Account
Hands-on lab: System Monitoring
Unit 2: System Service Access Controls
• Service and Network Access Controls
• System Initialization and Service Management
• Service and Application Access Controls
• tcp_wrappers Configuration
• Security Enhanced Linux (SELinux)
Hands-on Lab: Controlling access to certain hosts
Unit 3: Network Resource Access Controls
• Internet Protocol and Routing
• IPv6: Dynamic Interface Configuration
• IPv6: StaticInterface Configuration
• IPv6: Routing Configuration
• Netfilter Overview
• Rules: General Considerations
• Connection Tracking
• Network Address Translation (NAT)
• IPv6 and ip6tables
Hands-on Lab: Securing Networking
Unit 4: Organizing Networked Systems
• Host Name Resolution
• DNS-Specific Resolvers
• Trace a DNS Query with dig
• Exploring DNS with host
• Service Profile: DNS
• Getting Started with BIND
• bind-chroot Package
• caching-nameserver Package
• Remote Name Daemon Control (rndc)
• The DHCP Service
• DHCP Overview
• Configuring an IPv4 DHCP Server
Hands-on Lab: Implement a Minimal DNS Server
Unit 5: Network File Sharing Services
• File Transfer Protocol (FTP)
• Network File Service (NFS)
• Port options for the Firewall
• Samba services
• Configuring Samba
Hands-on Lab: Network File Sharing Services
Unit 6: Web Services
• Apache Overview
• Apache Server Configuration
• Virtual Hosts
• Apache Access Configuration
• Apache Encrypted Web Server
• Squid Web Proxy Cache
Hands-on Lab: Implementing Web (HTTP) Services
Unit 7: Electronic Mail Services
• Essential Email Operation
• Simple Mail Transport Protocol
• Sendmail SMTP Restrictions
• Sendmail Operation
• Using alternatives to Switch MTAs
• Postfix Configuration
• Postfix SMTP Restrictions
• Postfix Operation
• Mail Retrieval Protocols
Hands-on Lab: Electronic Mail
Unit 8: Securing Data
• The Need For Encryption
• Symmetric Encryption
• Asymmetric Encryption
• Public Key Infrastructures
• Digital Certificates
Hands-on Lab: Securing Data
Unit 9: Account Management
• Account Management
• Account Information (Name Service)
• Name Service Switch (NSS)
• Pluggable Authentication Modules (PAM)
• PAM Operation
• Utilities and Authentication
Hands-on Lab: Account Management Methods

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