Tag Archives: free DNS

How to speed up DNS caching on Linux machines with dnsmasq by https://is.gd/xDKMgl

Chances are, you’re looking to squeeze out as much performance from your Linux servers and desktops as possible. This is especially so with regards to networking. With Linux, there are so many tweaks you can undertake to optimize a machine, it’s mind blowing.

One such tweak that can significantly decrease your DNS lookups is by adding dnsmasq into the mix.

Dnsmasq is a lightweight DHCP and DNS caching nameserver. Unlike BIND, dnsmasq is incredibly simple to get up and running. The benefits of adding this will be quite obvious (like your DNS queries getting dramatically faster).

from https://is.gd/xDKMgl

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3 steps to install DNScrypt to improve your privacy – Ubuntu version

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Also if you use OpenDNS to improve your standard of privacy, you are not protected by “last mile” dangers but you can boost your security installing DNScrypt on your digital device. DNScrypt “works by encrypting all DNS traffic between the user and OpenDNS, preventing any spying, spoofing or man-in-the-middle attacks”.

DNScrypt “is a protocol that authenticates communications between a DNS client and a DNS resolver” and it “is not a replacement for a VPN, as it only authenticates DNS traffic, and doesn’t prevent “DNS leaks”, or third-party DNS resolvers from logging your activity”.

For this reason you have to be conscious that DNScrpt is just a -very good- improvement of your privacy but not the definitive solution to all your privacy concerns.

DNScrypt is so versatile that you can install it on every kind of device you prefer. In fact it is possible to download DNScrypt for servers, IOS, OSX, Android, Windows and Linux computers (DNScrypt-proxy version). Obviously the installation and setup will vary a little depending the OS you installed on your device.

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Here we are talking about DNScrypt installation on Ubuntu.

For this purpose I suggest to use the Terminal that allows you to install DNScrypt i just 3 steps:

sudo add-apt-repository ppa:anton+/dnscrypt

sudo apt-get update

sudo apt-get install dnscrypt-proxy

Last but not least, you need to interface the Internet traffic of your computer through the DNScrypt-proxy. For this reason you have to Edit your Network Configuration and add the address 127.0.0.2 to the “DNS Servers” line as for the below screenshot:

DNSCrypt

Now you can start DNScrypt just typing:

sudo dnscrypt-proxy -R opendns -a 127.0.0.2:53 -u okturtles

Where, in my specific case, okturtles is the name of the remote DNS resolver I decided to use. I chose that specific risolver from the list I found into into my computer after DNScrypt-proxy installation:

/usr/share/dnscrypt-proxy/dnscrypt-resolvers.csv

As usual in similar situations, you may want to spend another couple of minutes to configure your computer to start DNScrypt at the computer boot. Open the Session and Startup manager through the desktop Dash and Add this specific command to the Application Autostart menu:

sudo dnscrypt-proxy -R opendns -a 127.0.0.2:53 -u dnscrypt

How to install OpenDNS on Ubuntu (or XP, Vista and Leopard) for your peace of mind!

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I strongly believe that all you know OpenDNS yet. But for the few who still do not know this powerful free online tool we have posted a brief review in our Freeware Page. OpenDNS is very easy to configure and could be very useful to bypass all the restrictions that some ISP apply in certain countries. In Ubuntu 8.04, for example you have just to substitute your ISP default DNS with OpenDNS servers (208.67.222.222 and 208.67.220.220) in System – Administration – Network or to read the instruction contained on the proper OpenDNS page if you prefer to use the Terminal. For Windows and Apple users, we recommend to follow the official guide for XP, Vista and OSX. Moreover, if you decide to open a free account with OpenDNS, you will able to deeply examine or better manage all your network web traffic in just few clicks. Recommended!