Introduction to Linux Network Services

Introduction to Linux Network Services

Bascom Bridge’s  Linux Network Services course teaches students how to securely implement, troubleshoot, and manage network services.

 

LINUX NETWORK SERVICES OBJECTIVES

All students will:

  • Secure services with SELinux and Netfilter,
  • Learn DNS concepts and implementation with Bind
  • Understand LDAP concepts and implement using OpenLDAP
  • Secure the Apache httpd web server
  • FTP with vsftpd
  • Cache and filter proxies with Squid
  • Use SMB/CIFS (Windows networking) with Samba
  • Learn e-mail concepts and implement with Postfix combined with either Dovecot or Cyrus

LINUX NETWORK SERVICES PREREQUISITES

All students should already be comfortable with basic Linux or UNIX administration and have a solid understanding of network concepts and the TCP/IP protocol suite.

LINUX NETWORK SERVICES MATERIALS

All attendees receive comprehensive courseware and a related textbook.

SOFTWARE NEEDED FOR EACH PC:

  • Windows, Mac, or Linux PCs with at least 4 GB RAM
  • Accelebrate can provide a VirtualBox or VMware environment with all software needed for the class
    • This class can be taught using the Linux distribution of your choice
  • Please contact us for further setup details
  • For classes delivered online, all participants need either dual monitors or a separate device logged into the online session so that they can do their work on one screen and watch the instructor on the other. A separate computer connected to a projector or large screen TV would be another way for students to see the instructor’s screen simultaneously with working on their own.

LINUX NETWORK SERVICES OUTLINE

  • Introduction
  • Securing Services
    • Xinetd
    • Xinetd Connection Limiting and Access Control
    • Xinetd: Resource limits, redirection, logging
    • TCP Wrappers
    • The /etc/hosts.allow & /etc/hosts.deny Files
    • /etc/hosts.{allow,deny} Shortcuts
    • Advanced TCP Wrappers
    • Basic Firewall Activation
    • Netfilter: Stateful Packet Filter Firewall
    • Netfilter Concepts
    • Using the iptables Command
    • Netfilter Rule Syntax
    • Targets
    • Common match_specs
    • Connection Tracking
    • AppArmor
    • SELinux Security Framework
    • Choosing an SELinux Policy
    • SELinux Commands
    • SELinux Booleans
    • Graphical SELinux Policy Tools
  • DNS Concepts
    • Naming Services
    • DNS – A Better Way
    • The Domain Name Space
    • Delegation and Zones
    • Server Roles
    • Resolving Names
    • Resolving IP Addresses
    • Basic BIND Administration
    • Configuring the Resolver
    • Testing Resolution
  • Configuring Bind
    • BIND Configuration Files
    • named.conf Syntax
    • named.conf Options Block
    • Creating a Site-Wide Cache
    • rndc Key Configuration
    • Zones In named.conf
    • Zone Database File Syntax
    • SOA – Start of Authority
    • A & PTR – Address & Pointer Records
    • NS – Name Server
    • CNAME & MX – Alias & Mail Host
    • Abbreviations and Gotchas
    • $ORIGIN and $GENERATE
  • Creating DNS Hierarchies
    • Subdomains and Delegation
    • Subdomains
    • Delegating Zones
    • in-addr.arpa. Delegation
    • Issues with in-addr.arpa.
    • RFC2317 & in-addr.arpa.
  • Advanced Bind DNS Features
    • Address Match Lists & ACLs
    • Split Namespace with Views
    • Restricting Queries
    • Restricting Zone Transfers
    • Running BIND in a chroot jail
    • Dynamic DNS Concepts
    • Allowing Dynamic DNS Updates
    • DDNS Administration with nsupdate
    • Common Problems
    • Securing DNS with TSIG
  • LDAP Concepts and Clients
    • LDAP: History and Uses
    • LDAP: Data Model Basics
    • LDAP: Protocol Basics
    • LDAP: Applications
    • LDAP: Search Filters
    • LDIF: LDAP Data Interchange Format
    • OpenLDAP Client Tools
    • Alternative LDAP Tools
  • OpenLDAP Servers
    • Popular LDAP Server Implementations
    • OpenLDAP: Server Architecture
    • OpenLDAP: Backends
    • OpenLDAP: Replication
    • OpenLDAP: Configuration Options
    • OpenLDAP: Configuration Sections
    • OpenLDAP: Global Parameters
    • OpenLDAP: Database Parameters
    • OpenLDAP Server Tools
    • Enabling LDAP-based Login
    • System Security Services Daemon (SSSD)
  • Using Apache
    • HTTP Operation
    • Apache Architecture
    • Dynamic Shared Objects
    • Adding Modules to Apache
    • Apache Configuration Files
    • httpd.conf – Server Settings
    • httpd.conf – Main Configuration
    • HTTP Virtual Servers
    • Virtual Hosting DNS Implications
    • httpd.conf – VirtualHost Configuration
    • Port and IP based Virtual Hosts
    • Name-based Virtual Host
    • Apache Logging
    • Log Analysis
    • The Webalizer
  • Apache Security
    • Virtual Hosting Security Implications
    • Delegating Administration
    • Directory Protection
    • Directory Protection with AllowOverride
    • Common Uses for .htaccess
    • Symmetric Encryption Algorithms
    • Asymmetric Encryption Algorithms
    • Digital Certificates
    • SSL Using mod_ssl.so
  • Apache Server-Side Scripting Administration
    • Dynamic HTTP Content
    • PHP: Hypertext Preprocessor
    • Developer Tools for PHP
    • Installing PHP
    • Configuring PHP
    • Securing PHP
    • Security Related php.ini Configuration
    • Java Servlets and JSP
    • Apache’s Tomcat
    • Installing Java SDK
    • Installing Tomcat Manually
    • Using Tomcat with Apache
  • Implementing an FTP server
    • The FTP Protocol
    • Active Mode FTP
    • Passive Mode FTP
    • ProFTPD
    • Pure-FTPd
    • vsftpd
    • Configuring vsftpd
    • Anonymous FTP with vsftpd
  • The Squid Proxy Server
    • Squid Overview
    • Squid File Layout
    • Squid Access Control Lists
    • Applying Squid ACLs
    • Tuning Squid & Configuring Cache Hierarchies
    • Bandwidth Metering
    • Monitoring Squid
    • Proxy Client Configuration
  • Samba Concepts and Configuration
    • Introducing Samba
    • Samba Daemons
    • NetBIOS and NetBEUI
    • Accessing Windows/Samba Shares from Linux
    • Samba Utilities
    • Samba Configuration Files
    • The smb.conf File
    • Mapping Permissions and ACLs
    • Mapping Linux Concepts
    • Mapping Case Sensitivity
    • Mapping Users
    • Sharing Home Directories
    • Sharing Printers
    • Share Authentication
    • Share-Level Access
    • User-Level Access
    • Samba Account Database
    • User Share Restrictions
  • SMTP Theory
    • SMTP
    • SMTP Terminology
    • SMTP Architecture
    • SMTP Commands
    • SMTP Extensions
    • SMTP AUTH
    • SMTP STARTTLS
    • SMTP Session
  • POSTFIX
    • Postfix Features
    • Postfix Architecture
    • Postfix Components
    • Postfix Configuration
    • master.cf
    • main.cf
    • Postfix Map Types
    • Postfix Pattern Matching
    • Advanced Postfix Options
    • Virtual Domains
    • Postfix Mail Filtering
    • Configuration Commands
    • Management Commands
    • Postfix Logging
    • Logfile Analysis
    • chrooting Postfix
    • Postfix, Relaying and SMTP AUTH
    • SMTP AUTH Server and Relay Control
    • SMTP AUTH Clients
    • Postfix / TLS
    • TLS Server Configuration
    • Postfix Client Configuration for TLS
    • Other TLS Clients
    • Ensuring TLS Security
  • Mail Services and Retrieval
    • Filtering Email
    • Procmail
    • SpamAssassin
    • Bogofilter
    • amavisd-new Mail Filtering
    • Accessing Email
    • The IMAP4 Protocol
    • Dovecot POP3/IMAP Server
    • Cyrus IMAP/POP3 Server
    • Cyrus IMAP MTA Integration
    • Cyrus Mailbox Administration
    • Fetchmail
    • SquirrelMail
  • Conclusion

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Introduction to Linux Network Services

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  • Course No : LNX-104
  •  Theory : 40%
  •  Lab : 60%
  • Duration : 30 hours
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