4.2.2.2: The Story Behind a DNS Legend - 0 views
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Jeff Johnson on 22 Dec 10Chances are that if you're a network operator you know the IP address 4.2.2.2. It's an easy to type and easy to remember address, which since 1998 has been a "beefy" DNS service responding to the public Internet. Since you need DNS before you can use anything other than IP addresses on the Internet, it can come in handy for testing or initial configuration. Before Google started doing public DNS service on 8.8.8.8, and because 4.2.2.2 is typically pretty fast, many people have used it as their standard DNS server. Since the most basic test of Internet connectivity you can do is to ping an IP address (with DNS disabled), a "ping -n 4.2.2.2" can tell you if your networking problem is at a higher level or a lower level right away. Is this just an accident, or was this a deliberate choice? Was it intentionally set up as a public DNS service, or an accident. I've wondered this for years. But just recently I was investigating a networking oddness reported by Kyle who uses this, and I decided to try to dig deep and find out the story behind whatI imagine is one of the most famous IP addresses on the public Internet.
