Announcement

Collapse
No announcement yet.

Google Public DNS Now Available

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Google Public DNS Now Available

    Google is trying to improve DNS with their new public service. Here's what they have to say about how they improve DNS with their approach:

    * Speed: Resolver-side cache misses are one of the primary contributors to sluggish DNS responses. Clever caching techniques can help increase the speed of these responses. Google Public DNS implements prefetching: before the TTL on a record expires, we refresh the record continuously, asychronously and independently of user requests for a large number of popular domains. This allows Google Public DNS to serve many DNS requests in the round trip time it takes a packet to travel to our servers and back.

    * Security: DNS is vulnerable to spoofing attacks that can poison the cache of a nameserver and can route all its users to a malicious website. Until new protocols like DNSSEC get widely adopted, resolvers need to take additional measures to keep their caches secure. Google Public DNS makes it more difficult for attackers to spoof valid responses by randomizing the case of query names and including additional data in its DNS messages.

    * Validity: Google Public DNS complies with the DNS standards and gives the user the exact response his or her computer expects without performing any blocking, filtering, or redirection that may hamper a user's browsing experience.
    More info here:
    http://googlecode.blogspot.com/2009/...s-new-dns.html

    How to configure your network to use Google's DNS servers can be found here:
    http://code.google.com/speed/public-dns/docs/using.html

    For those already familiar with changing your DNS server, Google's DNS IPs are 8.8.8.8 and 8.8.4.4
    Last edited by Twisted_Firestarter; 12-04-2009, 01:25 PM.
    Twisted Firestarter
    a.k.a |TG| Harkonian
    sigpic

  • #2
    Re: Google Public DNS Now Available

    Thanks Twisted for starting this thread. I have it saved to put into the weekend update, but was still on the wall because I thought it might deserve it's own thread. Reason is Download squad posted an article about it

    Speed-up your surfing with Google's Public DNS

    But they also posted this:
    Speed up your internet DNS lookup time with NameBench

    NameBench is an easy to run benchmark that got started by someone at google using his 20% time. Google employee get to spend 20% of their work time on any side project they want to see what they can come up with.

    I ran it, and looks like my DNS is pretty crappy. I'm having some weird bugs since moving to my new house where about 1 in 20 clicks gives me either a not found or a very screwed up formated site. I was thinking about changing my DNS to see if that fixed it.

    But reading through the comments turns out your router has DNS settings too. Does anyone know if I should just change that, or change the router and all my computers too? Next time I get a screwed up page load I will get a screenshot.

    LINKS

    * *


    Stoop and you'll be stepped on; stand tall and you'll be shot at.

    -Carlos A. Urbizo-

    Comment


    • #3
      Re: Google Public DNS Now Available

      Originally posted by Bamboo View Post
      But reading through the comments turns out your router has DNS settings too. Does anyone know if I should just change that, or change the router and all my computers too? Next time I get a screwed up page load I will get a screenshot.

      The short answer is that you should configure it on your router and all your computers will then pick it up automagically--assuming you don't have DNS hard coded in your computer's network settings.

      Here are the DNS scenarios:
      1. Your computer requests DNS config info from the DHCP (your router). The router then requests DNS info from the ISP (or has it cached from a previous request) and sends that DNS info to your computer which adds it to the DNS table.
      2. Your computer requests DNS config info from the DHCP (your router). The router has the DNS entries hard-coded and sends them to your computer which adds it to the DNS table.
      3. Your computer had DNS entries hard coded and ignores any DNS info from the router
      Twisted Firestarter
      a.k.a |TG| Harkonian
      sigpic

      Comment


      • #4
        Re: Google Public DNS Now Available

        I plugged in Googles DNS into my router then ran their DNS benchmark tool http://code.google.com/p/namebench/

        The tool recommended that I use Ultra DNS for 50% faster results.

        Comment


        • #5
          Re: Google Public DNS Now Available

          Interesting. It tells me UltraDNS would be 80% faster than google.
          Twisted Firestarter
          a.k.a |TG| Harkonian
          sigpic

          Comment


          • #6
            Re: Google Public DNS Now Available

            My ISP DNS was pretty good in that namebench test so I left it alone.


            POE2 Developer

            Comment


            • #7
              Re: Google Public DNS Now Available

              Make sure you run it a bunch of times. I get a VERY different result and have run it 7-8 times now.

              LINKS

              * *


              Stoop and you'll be stepped on; stand tall and you'll be shot at.

              -Carlos A. Urbizo-

              Comment


              • #8
                Re: Google Public DNS Now Available

                Another good article on the subject:

                Is Google's DNS Service Worth It?


                ,

                LINKS

                * *


                Stoop and you'll be stepped on; stand tall and you'll be shot at.

                -Carlos A. Urbizo-

                Comment


                • #9
                  Re: Google Public DNS Now Available

                  I currently use OpenDNS and love it. I noticed web pages to be a bit "zippier" right away. I haven't tried the google product but read that openDNS tends to be a bit faster for US users. Google is better for non-US users... at least when comparing the two.

                  OpenDNS also offers more features and may be great for parents because you can have various levels of filtering / protection.
                  |TG-12th| asch
                  sigpic

                  Comment


                  • #10
                    Re: Google Public DNS Now Available

                    I didn't test before I switched, so this is just after I switched to Google's DNS.


                    In this test, Your current primary DNS server is
                    70% Faster
                    than UltraDNS

                    Comment


                    • #11
                      Re: Google Public DNS Now Available

                      Here's another DNS test utility.

                      172. 16. 0. 7 | Min | Avg | Max |Std.Dev|Reliab%|
                      ----------------+-------+-------+-------+-------+-------+
                      + Cached Name | 0.001 | 0.001 | 0.002 | 0.000 | 100.0 |
                      + Uncached Name | 0.035 | 0.117 | 0.504 | 0.086 | 100.0 |
                      + DotCom Lookup | 0.038 | 0.089 | 0.170 | 0.048 | 100.0 |
                      ----------------+-------+-------+-------+-------+-------+
                      dembo-wrls.my.domain
                      Nameserver on local network


                      208. 67.220.220 | Min | Avg | Max |Std.Dev|Reliab%|
                      ----------------+-------+-------+-------+-------+-------+
                      - Cached Name | 0.034 | 0.046 | 0.102 | 0.018 | 100.0 |
                      - Uncached Name | 0.036 | 0.127 | 0.531 | 0.090 | 100.0 |
                      - DotCom Lookup | 0.040 | 0.126 | 0.213 | 0.041 | 100.0 |
                      ----------------+-------+-------+-------+-------+-------+
                      resolver2.opendns.com
                      OpenDNS, LLC


                      208. 67.222.222 | Min | Avg | Max |Std.Dev|Reliab%|
                      ----------------+-------+-------+-------+-------+-------+
                      - Cached Name | 0.034 | 0.049 | 0.099 | 0.019 | 100.0 |
                      - Uncached Name | 0.035 | 0.122 | 0.314 | 0.071 | 100.0 |
                      - DotCom Lookup | 0.040 | 0.124 | 0.192 | 0.033 | 100.0 |
                      ----------------+-------+-------+-------+-------+-------+
                      resolver1.opendns.com
                      OpenDNS, LLC


                      8. 8. 8. 8 | Min | Avg | Max |Std.Dev|Reliab%|
                      ----------------+-------+-------+-------+-------+-------+
                      - Cached Name | 0.044 | 0.054 | 0.103 | 0.014 | 81.0 |
                      - Uncached Name | 0.058 | 0.164 | 0.390 | 0.095 | 85.3 |
                      - DotCom Lookup | 0.061 | 0.175 | 0.260 | 0.061 | 82.8 |
                      ----------------+-------+-------+-------+-------+-------+
                      google-public-dns-a.google.com
                      Level 3 Communications


                      8. 8. 4. 4 | Min | Avg | Max |Std.Dev|Reliab%|
                      ----------------+-------+-------+-------+-------+-------+
                      - Cached Name | 0.044 | 0.058 | 0.102 | 0.016 | 100.0 |
                      - Uncached Name | 0.050 | 0.154 | 0.340 | 0.087 | 93.9 |
                      - DotCom Lookup | 0.064 | 0.157 | 0.283 | 0.052 | 97.8 |
                      ----------------+-------+-------+-------+-------+-------+
                      google-public-dns-b.google.com
                      Level 3 Communications

                      OenDNS seems better than googleDNS and one of the fastest public DNS out there.


                      DB
                      Last edited by Dick Blonov; 12-06-2009, 10:19 PM.

                      «That looks like a really nice house except for that horrible bathroom.» Donrhos

                      | |





                      Comment


                      • #12
                        Re: Google Public DNS Now Available

                        I ran Blonov's utility, it pointed out 8 that were faster.

                        Under the conclusions tab it said

                        "Recommended Actions:

                        Unless you have some specific reason not to, you should give serious thought to disabling your router's provisioning of DNS services (which it is providing for all computers on your local network). After this is done, a fresh reboot of your computers will likely reveal the multiple DNS nameservers provided by your ISP. This is a superior configuration, without an under-powered router acting as a incompetent middleman and impeding all DNS access."

                        I always thought using the router was just fine. I didn't know there was an option to stop the router from handling DNS.

                        Comment


                        • #13
                          Re: Google Public DNS Now Available

                          I just switched to OpenDNS, I don't notice anything different from Googles, overall though, I did notice speed increase when I stopped using my ISP's DNS.

                          Comment


                          • #14
                            Re: Google Public DNS Now Available

                            Originally posted by UnDeaD77 View Post
                            I just switched to OpenDNS, I don't notice anything different from Googles, overall though, I did notice speed increase when I stopped using my ISP's DNS.
                            I don't think there will be noticeable difference between the two when browsing. OpenDNS usually gets a slight edge for US users when performing a measured test.

                            I think OpenDNS wins the feature list. They also may gain users who are scared of the google data monster.
                            |TG-12th| asch
                            sigpic

                            Comment


                            • #15
                              Re: Google Public DNS Now Available

                              Maximum PC has a whole article that explains things:
                              http://www.maximumpc.com/article/col...le_dns_oh_wait


                              .

                              LINKS

                              * *


                              Stoop and you'll be stepped on; stand tall and you'll be shot at.

                              -Carlos A. Urbizo-

                              Comment

                              Connect

                              Collapse

                              TeamSpeak 3 Server

                              Collapse

                              Advertisement

                              Collapse

                              Twitter Feed

                              Collapse

                              Working...
                              X