Tags: dns

How to Install PowerDNS DNS Server on Ubuntu

PowerDNS is a powerful DNS server like Bind9. But PowerDNS is much more flexible because PowerDNS uses a database such as MySQL, PostgreSQL, SQLite etc to store it's DNS entries. So it's very flexible and you can easily write custom web apps with PHP, Python, Node.js, Ruby etc to add, remove, and...
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How Stack Overflow Plans to Survive the Next DNS Attack

Let’s talk about DNS. After all, what could go wrong? It’s just cache invalidation and naming things. tl;dr This blog post is about how Stack Overflow and the rest of the Stack Exchange network approaches DNS: By bench-marking different DNS providers and how we chose between them By implementing...
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How DNS Works: A Primer

The Domain Name System is critical to fundamental IP networking. Learn DNS basics in this primer. DNS has been in the news a great deal as of late. First, there was the controversy over the United States government essentially handing over control of the Internet's root domain naming system. Then...
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Let's Encrypt
Let’s Encrypt -- which provides free, automated, and open SSL certificates to more than 13 million fully qualified domain names -- was awarded a grant from The Ford Foundation as part of its efforts to financially support its growing operations.

Let’s Encrypt and The Ford Foundation Aim To Create a More Inclusive Web

Let’s Encrypt was awarded a grant from The Ford Foundation as part of its efforts to financially support its growing operations. This is the first grant that has been awarded to the young nonprofit, a Linux Foundation project which provides free, automated and open SSL certificates to more than 13...
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What We Know About Friday’s Massive East Coast Internet Outage

This morning’s attack started around 7am and was aimed at Dyn, an Internet infrastructure company headquartered in New Hampshire. That first bout was resolved after about two hours; a second attack began just before noon. In both cases, traffic to Dyn’s Internet directory servers on the East Coast...
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ICANN Grinds Forward on Crucial DNS Root Zone Signing Key Update

The Internet Corporation for Assigned Names and Numbers is moving -- carefully -- to upgrade the DNS root zone key by which all domains can be authenticated under the DNS Security Extensions protocol. ICANN is the organization responsible for managing the Domain Name System, and DNS Security...
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DNS dig utility
Chris Binnie wraps up his series on DNS with a look at some security options.

Dig into DNS: Part 4

Previously in this series (see links below), I’ve described the dig utility and its many uses in performing DNS lookups, along with several examples to help solve specific problems. In this final installment, I’ll look briefly at some security options and wrap up with additional examples. All...
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dig utility
In the third part of this series, Chris Binnie looks at his favorite dig utility feature -- the “trace” option.

Dig into DNS: Part 3

In the first and second articles in this series, I introduced the powerful dig utility and its uses in performing DNS lookups along with a few time-saving examples of to put it into practice. In this part, I’ll look at my favorite dig utility feature -- which is definitely the “trace” option. For...
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dig utility
Chris Binnie explains how dig syntax differs from other DNS lookup packages and offers some time-saving examples.

Dig Into DNS: Part 2

In the first article in this series, I provided an introduction to the powerful dig utility and its uses in performing DNS lookups. For those who haven't used the command before, these articles will give a useful overview of its features and capabilities. This time, I’ll explain how dig syntax...
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dig utility
This series of articles will explore the dig DNS lookup tool and its many features and uses.

Dig Into DNS: Part 1

There’s little debate that one of the absolutely fundamental services critical to the functionality of the Internet is the Domain Name System (DNS). Akin to the Simple Mail Transfer Protocol (SMTP), which is the grounding for all things email, and the Network Time Protocol (NTP), which keeps the...
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