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Module 4. DNS Installation. DNS Software. BIND (80+ %) www.isc.org Berkeley Internet Name Domain NSD (Name Server Daemon) www.nlnetlabs.nl/projects/nsd Authoritative DNS Only UNBOUND unbound.net Caching DNS only. DNS Software - BIND. Bind runs on: Linux BSD (Free/Open/NetBSD)

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module 4
Module 4

DNS Installation

dns software
DNS Software
  • BIND (80+ %)
    • www.isc.org
    • Berkeley Internet Name Domain
  • NSD (Name Server Daemon)
    • www.nlnetlabs.nl/projects/nsd
    • Authoritative DNS Only
  • UNBOUND
    • unbound.net
    • Caching DNS only
dns software bind
DNS Software - BIND
  • Bind runs on:
    • Linux
    • BSD (Free/Open/NetBSD)
    • Windows (Server 2000, 2003, XP, Vista, 7)
    • Lots of *nix systems
  • Out-of-the-box installs on most Linux distributions and RPMs
  • BSD – Ports system
  • Windows – zipped .exe (runs as a service)
  • Daemon name is named
bind chroot jail sandbox
BIND chroot/jail/sandbox
  • Most distributions default to chroot install
    • /var/named
    • /var/named/chroot
  • Chroot is a matter of taste but important in secure environments
  • Chroot limits all daemon access to a defined path (adds base to all paths)
  • Invoked with –t option when bind loads
  • -u named limits access to named account
exercise
Exercise
  • Install BIND on your PC
  • Uses latest BIND9
  • Default path:
    • %systemroot%\system32\dns
    • %systemroot%\sysWOW64\dns
bind run time
BIND – run time
  • Starting BIND
    • /etc/rc.d/init.d/named start
    • named –u named [-t /path/]
  • Stopping BIND
    • /etc/rc.d/init.d/named stop
    • ps ax |grep named, Kill PID
  • Windows Control uses:
    • Administrative tools->Services
bind control rndc
BIND Control - rndc
  • rndc tool with bind installation
  • Allows remote access to bind
  • Default install enables rndc
    • Disable with empty controls clause
    • controls {};
  • Before use must run to set up default key:
    • rndc-confgen -a
bind rndc commands
BIND – rndc commands
  • Flush – flush cache(s)
  • Freeze zone – stop DDNS activity
  • Thaw zone – restart DDNS activity
  • Halt – immediate stop (no restart)
  • Status – BIND status
  • Reload – reload config file and all zones (keeps cache)
  • Refresh zone – force zone transfer
  • Stop – graceful stop (no restart)
quick quiz
Quick Quiz
  • Name 2 Open Source DNS implementations?
  • What is the name of BIND\'s daemon (process)?
  • What is the name of the remote control tool?
  • Did your installation work?
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