Common services

• System daemons 101
  • NTP
  • Kernel daemons
  • Filesystem daemons
  • udevd
  • crond
  • atd
  • sshd
• DNS 101
  • A Brief History of DNS
  • Terminology
    • Domain name
    • Top-Level Domain
    • Fully Qualified Domain Name (FQDN)
    • IP address
    • Zonefile
    • Records
  • How DNS works
    • Root Servers
    • TLD Servers
    • Domain-level nameservers
  • Resource types
  • An example zonefile
  • Host-specific DNS configuration
    • /etc/hosts
    • /etc/resolv.conf
    • Caching
  • TTLs
  • Forward and reverse DNS
  • Useful DNS tools
    • Windows
    • Unix
• DNS 201
  • Architecture/design choices
    • Master/slave
    • Shadow master/slave
    • Shadow master/multi=slave
    • Split horizon
  • DNSSEC
• DHCP
  • Tools: ISC dhcpd
  • Protocol
  • dhcp helper
  • Defining classes, leases
  • Options
    • Default gateway
    • DNS server(s)
• HTTP 101 (Core protocol)
  • Request
  • Response
    • Common response codes
  • Tools: Speaking http with telnet/netcat/curl
    • Telnet
    • cURL
    • netcat
      • Basic client/server
      • Serving HTTP
  • Apache, nginx
  • HTML
  • Virtual hosting
    • IP-based
    • Name-based
• HTTP 201 (Application Servers & Frameworks)
  • Java
    • Tomcat
    • JBoss
    • Jetty
  • node.js / Server-side Javascript
  • Perl
  • PHP
  • Ruby
    • Rails
    • Sinatra
  • Python
    • Django
    • Flask
• SMTP 101
  • Tools: Speaking smtp with telnet/netcat
  • Risks / Dangers / Open relays
  • Protocol
    • MX routing
    • Envelope
    • Message Headers
    • Message Body
  • MTAs (forwarding, smart hosts, etc.)
    • Postfix
    • Sendmail
• SMTP 201
  • Anti=Spam
    • Blacklisting
    • Whitelisting
    • Greylisting
    • SpamAssassin?
  • Reliable Mail Delivery
  • Basic Etiquette
  • Authentication (SPF, DKIM)
  • Bounce Management
  • Feedback Loops
  • Reputation Management
  • Advanced routing
  • Hosted services = why they are good/bad/ugly