Setting up a local DNS server with Unbound
Finishing Up
When your configuration is ready, just boot your server up with the following command:
# /etc/init.d/unbound start
This command will bring up a caching DNS server with anti-advertisement, anti-malware, and anti-phishing capabilities, as well as a limited capability for validating the authenticity of the DNS responses it takes. Not bad at all.
The only task left to do is to configure the devices in your LAN to use this server. There are three main ways to do this. You can manually configure each one to use your DNS server, which is usually impractical. The second option is to configure your network router to assign your server via DHCP to each device that connects to the network. This is the easiest way, and it will work most of the time, as long as your router supports assigning custom DNS servers to the devices in your LAN.
There is a third, evil option, that I like to use when I have to deal with devices that will ignore DNS servers provided by DHCP. This method is to instruct the router to redirect queries to unauthorized DNS servers to your local DNS instance, using ds-nat. In practice, you are performing a man-in-the-middle attack by letting your local DNS server pretend to be the DNS server the rogue device is trying to connect to. This requires a router capable of advanced firewall configuration. But such mean deeds are the subject for another article.
Infos
- What is DNSSEC? https://www.icann.org/resources/pages/dnssec-what-is-it-why-important-2019-03-05-en
- What Is the Difference between Authoritative and Recursive DNS Nameservers? https://umbrella.cisco.com/blog/2014/07/16/difference-authoritative-recursive-dns-nameservers/
- Against DNSSEC: https://sockpuppet.org/blog/2015/01/15/against-dnssec/
- Questions and Answers from "Against DNSSEC": https://sockpuppet.org/stuff/dnssec-qa.html
- DNS over TLS Wikipedia article: https://en.wikipedia.org/wiki/DNS_over_TLS
- DNSCrypt official site: https://dnscrypt.info/
- Opennic Project: https://www.opennic.org/
- DNS.WATCH official site: https://dns.watch/
- StevenBlack DNS Blacklist: https://github.com/StevenBlack/hosts
- Practical Attacks with DNS Rebinding: https://www.tripwire.com/state-of-security/vert/practical-attacks-dns-rebinding/
- Namebench: https://code.google.com/archive/p/namebench/
« Previous 1 2 3 4
Buy this article as PDF
(incl. VAT)
Buy Linux Magazine
US / Canada
UK / Australia
Direct Download
Read full article as PDF:
Price $2.95
Subscribe to our Linux Newsletters
Find Linux and Open Source Jobs
Subscribe to our ADMIN Newsletters
Find SysAdmin Jobs
News
-
Escuelas Linux 8.0 is Now Available
Just in time for its 25th anniversary, the developers of Escuelas Linux have released the latest version.
-
LibreOffice 7.5 has Arrived Loaded with New Features and Improvements
The favorite office suite of the Linux community has a new release that includes some visual refreshing and new features across all modules.
-
The Next Major Release of Elementary OS Has Arrived
It's been over a year since the developers of elementary OS released version 6.1 (Jólnir) but they've finally made their latest release (Horus) available with a renewed focus on the user.
-
KDE Plasma 5.27 Beta Is Ready for Testing
The latest beta iteration of the KDE Plasma desktop is now available and includes some important additions and fixes.
-
Netrunner OS 23 Is Now Available
The latest version of this Linux distribution is now based on Debian Bullseye and is ready for installation and finally hits the KDE 5.20 branch of the desktop.
-
New Linux Distribution Built for Gamers
With a Gnome desktop that offers different layouts and a custom kernel, PikaOS is a great option for gamers of all types.
-
System76 Beefs Up Popular Pangolin Laptop
The darling of open-source-powered laptops and desktops will soon drop a new AMD Ryzen 7-powered version of their popular Pangolin laptop.
-
Nobara Project Is a Modified Version of Fedora with User-Friendly Fixes
If you're looking for a version of Fedora that includes third-party and proprietary packages, look no further than the Nobara Project.
-
Gnome 44 Now Has a Release Date
Gnome 44 will be officially released on March 22, 2023.
-
Nitrux 2.6 Available with Kernel 6.1 and a Major Change
The developers of Nitrux have officially released version 2.6 of their Linux distribution with plenty of new features to excite users.