Comments on: Alternate DNS Servers

By: Shanmugam

Shanmugam — Tue, 03 Aug 2010 10:10:55 +0000

When the internet connection doesn’t work due to DNS issues, we often use these two DNS servers to resolve it: 4.2.2.1 and 4.2.2.2

Here is an article about it:
http://www.bukisa.com/articles/327629_4221-and-4222-the-fast-dns-servers-for-faster-internet

By: petrilli

petrilli — Sat, 31 Jul 2010 03:55:13 +0000

As someone who used to be at GTE/Genuity/L3, 4.2.2.x predate Genuity. They’re actually part of the heritage of BBN, or “the people who build the Internet”. As far as I’m aware, they are the first implementation of the anycast idea in DNS. If my memory serves me — and it’s been many years — every single server, and there are many, is BGP peered into the network so that it will benefit from the overall routing architecture. As such, overall, it achieved 100% uptime for many years. Last I knew, there had been no downtime that was actually attributable to the server clusters, and instead it was all caused by peering issues.

By: james

james — Sun, 14 Jun 2009 19:44:56 +0000

Genuity was originally a dot com-era brand of the old GTE (now named Verizon), and offered business-class internet services (hosting, VPN, etc). Thats why a lookup on these IP’s sometimes returns an owner of GTEI (GTE Internet). I never followed Genuity after 2001 or so (which is when GTE sold it I believe) but it would make sense that L3 owns the brand now.

Should those 4.2.2.x servers ever go down lots of things will go boom. 4.2.2.1 and 4.2.2.2 are so reliable that many consultants/techs/admins/etc (including myself) use them as a test or temporary work-around for less-reliable DNS servers. Unfortunately, like most work-arounds, many of us forget to change them back or find a better fix. I frequently find 4.2.2.1 and its siblings configured in DNS server forwarding lists, home gateways, mail filters, even global Exchange org configurations.

By: sam

sam — Thu, 11 Jun 2009 02:03:19 +0000

Just so you know those backbone addresses are for the Go-mint and the copses. You will all be pushed to these select IPs for DHCP so they can track you moves. True DHCP will die. Static IP and select (read traceable) DHCP is the way of the future.

By: kashmiri

kashmiri — Tue, 26 May 2009 09:46:05 +0000

BTW, Genuity is a company that manufactures genetically modified seeds. Their website loads without problems if you use their dns.

By: OpenDNS: A Followup at Sector 930

OpenDNS: A Followup at Sector 930 — Wed, 13 May 2009 13:50:18 +0000

[...] instructions on how to change this: (from this guy) Click on “My Computer”. Click on “My Network Places”. Click on “View Connections”. [...]

By: Suman

Suman — Sun, 26 Apr 2009 16:56:39 +0000

It's much better to set up a local DNS cache on your computer. It speeds up DNS lookup to a large extent. Read this http://www.instantfundas.com/2008/04/speed-up-your-browsing-by-setting-up.html

By: Fluctuating access problems at TechDonkey.com

Fluctuating access problems at TechDonkey.com — Sun, 12 Apr 2009 19:24:56 +0000

[...] http://www.handcoding.com/archives/2005/04/15/alternate-dns-servers/ [...]

By: Sunny

Sunny — Wed, 08 Apr 2009 17:45:16 +0000

Always REPLYING DNS I have ever use for my Server
the DNS is Recommending
Good Luck,
sonypez

By: Rotaboy

Rotaboy — Sun, 07 Sep 2008 09:58:05 +0000

Hi all,
To check how fast the DNS is, here is a tool that i found.

http://www.codeproject.com/KB/IP/DNSTester.aspx

A tool that can be used to analyse your DNS performance. It checks the timing of DNS requests between two DNS servers, and displays the results. Download the tool and enter your DNS.