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  3. DNS Cache, craziest thing

DNS Cache, craziest thing

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  • R raddevus

    Yeah, I do believe that. The odd thing is that this computer had connected to the correct ip address earlier today. Now I cannot get it to get that ip address again. I've flushed dns multiple times, etc. It's crazy. and yet, my work network thinks it has the new IP address & I even ran ipconfig / flushdns there and it still has the new IP address. Let's see what people get: $ ping newlibre.com The old one is : 205.144.171.178 The new one is (note - I thought it was 65.x but is different): 64.209.142.205 Ping and reply if you don't mind. I'm just interested. Thanks

    L Offline
    L Offline
    Luc Pattyn
    wrote on last edited by
    #4

    There are DNS caches all around the internet; they each hold data with some expiration time. It takes days for all of them to forget old stuff. My ping gave 64.209.142.205 :)

    Luc Pattyn [My Articles] The Windows 11 "taskbar" is disgusting. It should be at the left of the screen, with real icons, with text, progress, etc. They downgraded my developer PC to a bloody iPhone.

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    • R raddevus

      Yeah, I do believe that. The odd thing is that this computer had connected to the correct ip address earlier today. Now I cannot get it to get that ip address again. I've flushed dns multiple times, etc. It's crazy. and yet, my work network thinks it has the new IP address & I even ran ipconfig / flushdns there and it still has the new IP address. Let's see what people get: $ ping newlibre.com The old one is : 205.144.171.178 The new one is (note - I thought it was 65.x but is different): 64.209.142.205 Ping and reply if you don't mind. I'm just interested. Thanks

      K Offline
      K Offline
      kmoorevs
      wrote on last edited by
      #5

      I just hit it on the 64. address.

      "Go forth into the source" - Neal Morse "Hope is contagious"

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      • L Luc Pattyn

        There are DNS caches all around the internet; they each hold data with some expiration time. It takes days for all of them to forget old stuff. My ping gave 64.209.142.205 :)

        Luc Pattyn [My Articles] The Windows 11 "taskbar" is disgusting. It should be at the left of the screen, with real icons, with text, progress, etc. They downgraded my developer PC to a bloody iPhone.

        R Offline
        R Offline
        raddevus
        wrote on last edited by
        #6

        That's the correct one (new one). But I can't get it on my device any more. It's crazy! I'm going to drink some coffee then hide under my desk for a while. :sigh:

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        • K kmoorevs

          I just hit it on the 64. address.

          "Go forth into the source" - Neal Morse "Hope is contagious"

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          raddevus
          wrote on last edited by
          #7

          Thanks very much for trying. I tried it again and I still get the 205 address. I'm going to drink some coffee & hide under my desk for a while. :sigh:

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          • R raddevus

            That's the correct one (new one). But I can't get it on my device any more. It's crazy! I'm going to drink some coffee then hide under my desk for a while. :sigh:

            L Offline
            L Offline
            Luc Pattyn
            wrote on last edited by
            #8

            Three days under your desk? No, its not crazy. It is annoying, maybe very annoying, however you have to wait for all relevant nodes to have your old DNS info expired. You might try using a VPN to some location far away, where you have never been before; and then ping again. :)

            Luc Pattyn [My Articles] The Windows 11 "taskbar" is disgusting. It should be at the left of the screen, with real icons, with text, progress, etc. They downgraded my developer PC to a bloody iPhone.

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            • L Luc Pattyn

              Three days under your desk? No, its not crazy. It is annoying, maybe very annoying, however you have to wait for all relevant nodes to have your old DNS info expired. You might try using a VPN to some location far away, where you have never been before; and then ping again. :)

              Luc Pattyn [My Articles] The Windows 11 "taskbar" is disgusting. It should be at the left of the screen, with real icons, with text, progress, etc. They downgraded my developer PC to a bloody iPhone.

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              raddevus
              wrote on last edited by
              #9

              Luc Pattyn wrote:

              You might try using a VPN to some location far away, where you have never been before; and then ping again.

              I have a DigitalOcean droplet running Debian out there on the web. Earlier I ssh'd out to it and pinged it and it was getting 205. I just connected to it again and I got the 64.x address. I guess it is slowly getting propagated to DNS. Again, the weirdest thing is that this computer I'm on was getting the 64.x address & now isn't and I can't seem to get it to get back to 64.x. Still under my desk. :sigh:

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              • R raddevus

                So i'm switching to a new WebHost. I switched my DNS hosts to the new ones (in Google Domains) and waited. That worked fine after a wait and my new ip address came up. 65.x.x.x Hours later I'm working on my web site and something odd happens I see the old web site. I ping the site from the same machine where i saw it change to 65.x.x.x (new ip address). It is now pointing back to old one 205.x.x.x :confused: :wtf: No idea. I've flushed local cache etc. Still old one now. I went to my DigitalOcean site and pinged it got 205.x.x.x (OLD ONE!!!) Went to another computer on another network and pinged I get the new one 65.x.x.x. Wha?t!?? :confused: :wtf: :confused: :wtf: :confused: :wtf: :confused: Really exasperating. ## UPDATE ## Problem still occuring. I thought of something: Test on my phone (with wifi turned off -- using cellular data). 1. turned off wifi on my phone and hit newlibre.com -- saw my new web site. 2. turned wifi back on (on phone) and navigated to newlibre.com -- saw the old site. 3. obviously this is cached on my wifi router, right? 4. Imma haf to reboot my wifi router I guess. OY!!! ### UPDATE 2 #### I fired up a Win10 image via VirtualBox and ran ipconfig /flushdns All of a sudden I saw the new IP Address. VirtualBox win10 was running under this Linux machine I'm on. Finally saw the correct IP address here too. I guess it just propagated through, because I never did reboot the wifi router. I've finally crawled back out from under my desk. :rolleyes:

                K Offline
                K Offline
                kmoorevs
                wrote on last edited by
                #10

                Many years ago, I posted another weird DNS oddity...another domain name was pointed to my address. Even after I redirected to a custom page 'hey, check your DNS settings...' it stayed that way for several years until the webhost upgraded.

                "Go forth into the source" - Neal Morse "Hope is contagious"

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                • K kmoorevs

                  Many years ago, I posted another weird DNS oddity...another domain name was pointed to my address. Even after I redirected to a custom page 'hey, check your DNS settings...' it stayed that way for several years until the webhost upgraded.

                  "Go forth into the source" - Neal Morse "Hope is contagious"

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                  R Offline
                  raddevus
                  wrote on last edited by
                  #11

                  Oh no! I'm going to be under my desk for a long, long time. :laugh:

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                  • R raddevus

                    Oh no! I'm going to be under my desk for a long, long time. :laugh:

                    O Offline
                    O Offline
                    oofalladeez343
                    wrote on last edited by
                    #12

                    I'd go even as far as to move my desk to a galaxy far, far away... :-\ :-\ :-\ :laugh:

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                    • R raddevus

                      Yeah, I do believe that. The odd thing is that this computer had connected to the correct ip address earlier today. Now I cannot get it to get that ip address again. I've flushed dns multiple times, etc. It's crazy. and yet, my work network thinks it has the new IP address & I even ran ipconfig / flushdns there and it still has the new IP address. Let's see what people get: $ ping newlibre.com The old one is : 205.144.171.178 The new one is (note - I thought it was 65.x but is different): 64.209.142.205 Ping and reply if you don't mind. I'm just interested. Thanks

                      P Offline
                      P Offline
                      Peter Kassenaar
                      wrote on last edited by
                      #13

                      Pinging from The Netherlands, 2022-01-26, 08:25 UTC and got the 64.* address. Seems to be working in order, as I've never visited this address before...

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                      • R raddevus

                        Yeah, I do believe that. The odd thing is that this computer had connected to the correct ip address earlier today. Now I cannot get it to get that ip address again. I've flushed dns multiple times, etc. It's crazy. and yet, my work network thinks it has the new IP address & I even ran ipconfig / flushdns there and it still has the new IP address. Let's see what people get: $ ping newlibre.com The old one is : 205.144.171.178 The new one is (note - I thought it was 65.x but is different): 64.209.142.205 Ping and reply if you don't mind. I'm just interested. Thanks

                        pkfoxP Offline
                        pkfoxP Offline
                        pkfox
                        wrote on last edited by
                        #14

                        My ping gave **64.209.142.205** - I'm in the UK

                        "Life should not be a journey to the grave with the intention of arriving safely in a pretty and well-preserved body, but rather to skid in broadside in a cloud of smoke, thoroughly used up, totally worn out, and loudly proclaiming “Wow! What a Ride!" - Hunter S Thompson - RIP

                        R 1 Reply Last reply
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                        • R raddevus

                          Yeah, I do believe that. The odd thing is that this computer had connected to the correct ip address earlier today. Now I cannot get it to get that ip address again. I've flushed dns multiple times, etc. It's crazy. and yet, my work network thinks it has the new IP address & I even ran ipconfig / flushdns there and it still has the new IP address. Let's see what people get: $ ping newlibre.com The old one is : 205.144.171.178 The new one is (note - I thought it was 65.x but is different): 64.209.142.205 Ping and reply if you don't mind. I'm just interested. Thanks

                          A Offline
                          A Offline
                          Alister Morton
                          wrote on last edited by
                          #15

                          Just pinged 64... here in the UK.

                          R 1 Reply Last reply
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                          • R raddevus

                            So i'm switching to a new WebHost. I switched my DNS hosts to the new ones (in Google Domains) and waited. That worked fine after a wait and my new ip address came up. 65.x.x.x Hours later I'm working on my web site and something odd happens I see the old web site. I ping the site from the same machine where i saw it change to 65.x.x.x (new ip address). It is now pointing back to old one 205.x.x.x :confused: :wtf: No idea. I've flushed local cache etc. Still old one now. I went to my DigitalOcean site and pinged it got 205.x.x.x (OLD ONE!!!) Went to another computer on another network and pinged I get the new one 65.x.x.x. Wha?t!?? :confused: :wtf: :confused: :wtf: :confused: :wtf: :confused: Really exasperating. ## UPDATE ## Problem still occuring. I thought of something: Test on my phone (with wifi turned off -- using cellular data). 1. turned off wifi on my phone and hit newlibre.com -- saw my new web site. 2. turned wifi back on (on phone) and navigated to newlibre.com -- saw the old site. 3. obviously this is cached on my wifi router, right? 4. Imma haf to reboot my wifi router I guess. OY!!! ### UPDATE 2 #### I fired up a Win10 image via VirtualBox and ran ipconfig /flushdns All of a sudden I saw the new IP Address. VirtualBox win10 was running under this Linux machine I'm on. Finally saw the correct IP address here too. I guess it just propagated through, because I never did reboot the wifi router. I've finally crawled back out from under my desk. :rolleyes:

                            C Offline
                            C Offline
                            Clumpco
                            wrote on last edited by
                            #16

                            Next time (hopefully there won't be one, but you never know) try using "nslookup" which allows you to use different name servers to see where the problem lies. By default nslookup uses your default nameserver - just type "nslookup" to start it and get the default, viz:

                            C:\Windows\System32>nslookup
                            Default Server: pi.hole
                            Address: 192.168.1.37

                            Now type in the host name that you are looking for

                            > www.ibm.com
                            Server: pi.hole
                            Address: 192.168.1.37

                            Non-authoritative answer:
                            Name: e7817.dscx.akamaiedge.net
                            Addresses: 2a02:26f0:d6:39e::1e89
                            2a02:26f0:d6:382::1e89
                            104.125.7.129
                            Aliases: www.ibm.com
                            www.ibm.com.cs186.net
                            outer-global-dual.ibmcom-tls12.edgekey.net

                            Now change the name server to see if you get the same answer.

                            > server 8.8.8.8
                            Default Server: dns.google
                            Address: 8.8.8.8

                            www.ibm.com
                            Server: dns.google
                            Address: 8.8.8.8
                            etc...

                            I hope that this helps. P.S. you will notice that I use pi-hole https://pi-hole.net/[^] , if you don't already, you should do! Kills most adverts and dodgy sites.

                            So old that I did my first coding in octal via switches on a DEC PDP 8

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                            • P Peter Kassenaar

                              Pinging from The Netherlands, 2022-01-26, 08:25 UTC and got the 64.* address. Seems to be working in order, as I've never visited this address before...

                              R Offline
                              R Offline
                              raddevus
                              wrote on last edited by
                              #17

                              Thanks for your help. I appreciate it. It looks like it finally propagated through to me too. :thumbsup:

                              1 Reply Last reply
                              0
                              • pkfoxP pkfox

                                My ping gave **64.209.142.205** - I'm in the UK

                                "Life should not be a journey to the grave with the intention of arriving safely in a pretty and well-preserved body, but rather to skid in broadside in a cloud of smoke, thoroughly used up, totally worn out, and loudly proclaiming “Wow! What a Ride!" - Hunter S Thompson - RIP

                                R Offline
                                R Offline
                                raddevus
                                wrote on last edited by
                                #18

                                Thanks for letting me know. I appreciate it. It looks like it finally got through on my side too and I see 64.x. :thumbsup:

                                1 Reply Last reply
                                0
                                • A Alister Morton

                                  Just pinged 64... here in the UK.

                                  R Offline
                                  R Offline
                                  raddevus
                                  wrote on last edited by
                                  #19

                                  Thanks for trying it out. I appreciate it. It seems like it finally got through to me too. :thumbsup:

                                  1 Reply Last reply
                                  0
                                  • C Clumpco

                                    Next time (hopefully there won't be one, but you never know) try using "nslookup" which allows you to use different name servers to see where the problem lies. By default nslookup uses your default nameserver - just type "nslookup" to start it and get the default, viz:

                                    C:\Windows\System32>nslookup
                                    Default Server: pi.hole
                                    Address: 192.168.1.37

                                    Now type in the host name that you are looking for

                                    > www.ibm.com
                                    Server: pi.hole
                                    Address: 192.168.1.37

                                    Non-authoritative answer:
                                    Name: e7817.dscx.akamaiedge.net
                                    Addresses: 2a02:26f0:d6:39e::1e89
                                    2a02:26f0:d6:382::1e89
                                    104.125.7.129
                                    Aliases: www.ibm.com
                                    www.ibm.com.cs186.net
                                    outer-global-dual.ibmcom-tls12.edgekey.net

                                    Now change the name server to see if you get the same answer.

                                    > server 8.8.8.8
                                    Default Server: dns.google
                                    Address: 8.8.8.8

                                    www.ibm.com
                                    Server: dns.google
                                    Address: 8.8.8.8
                                    etc...

                                    I hope that this helps. P.S. you will notice that I use pi-hole https://pi-hole.net/[^] , if you don't already, you should do! Kills most adverts and dodgy sites.

                                    So old that I did my first coding in octal via switches on a DEC PDP 8

                                    R Offline
                                    R Offline
                                    raddevus
                                    wrote on last edited by
                                    #20

                                    Very interesting and great information. This will help. Thanks for posting. :thumbsup:

                                    1 Reply Last reply
                                    0
                                    • R raddevus

                                      Yeah, I do believe that. The odd thing is that this computer had connected to the correct ip address earlier today. Now I cannot get it to get that ip address again. I've flushed dns multiple times, etc. It's crazy. and yet, my work network thinks it has the new IP address & I even ran ipconfig / flushdns there and it still has the new IP address. Let's see what people get: $ ping newlibre.com The old one is : 205.144.171.178 The new one is (note - I thought it was 65.x but is different): 64.209.142.205 Ping and reply if you don't mind. I'm just interested. Thanks

                                      D Offline
                                      D Offline
                                      DerekT P
                                      wrote on last edited by
                                      #21

                                      I recently had some DNS issues, and my hosting provider suggested this whatsmydns.net[^] (which is possibly the most useful thing they've ever suggested :laugh: ) Easy-to-use and gives you a pretty good overview of what's happening where.

                                      R 2 Replies Last reply
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                                      • D DerekT P

                                        I recently had some DNS issues, and my hosting provider suggested this whatsmydns.net[^] (which is possibly the most useful thing they've ever suggested :laugh: ) Easy-to-use and gives you a pretty good overview of what's happening where.

                                        R Offline
                                        R Offline
                                        raddevus
                                        wrote on last edited by
                                        #22

                                        very interesting. I will check it out. Thanks for posting. :thumbsup:

                                        1 Reply Last reply
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                                        • D DerekT P

                                          I recently had some DNS issues, and my hosting provider suggested this whatsmydns.net[^] (which is possibly the most useful thing they've ever suggested :laugh: ) Easy-to-use and gives you a pretty good overview of what's happening where.

                                          R Offline
                                          R Offline
                                          raddevus
                                          wrote on last edited by
                                          #23

                                          Wow, that is really cool!!! :thumbsup::thumbsup:

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