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  3. DNS Cache, craziest thing

DNS Cache, craziest thing

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  • R Offline
    R Offline
    raddevus
    wrote on last edited by
    #1

    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:

    O K C D K 5 Replies Last reply
    0
    • 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:

      O Offline
      O Offline
      obermd
      wrote on last edited by
      #2

      It can take 24 to 72 hours for DNS to update across the internet.

      R 1 Reply Last reply
      0
      • O obermd

        It can take 24 to 72 hours for DNS to update across the internet.

        R Offline
        R Offline
        raddevus
        wrote on last edited by
        #3

        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 K P pkfoxP A 8 Replies 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

          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.

          R 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

            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"

            R 1 Reply Last reply
            0
            • 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:

              L 1 Reply Last reply
              0
              • K kmoorevs

                I just hit it on the 64. address.

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

                R Offline
                R Offline
                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:

                1 Reply Last reply
                0
                • 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.

                  R 1 Reply Last reply
                  0
                  • 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.

                    R Offline
                    R Offline
                    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:

                    1 Reply Last reply
                    0
                    • 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"

                      R 1 Reply Last reply
                      0
                      • 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"

                        R Offline
                        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:

                        O 1 Reply Last reply
                        0
                        • 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:

                          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

                            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...

                            R 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

                              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
                              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

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

                                Just pinged 64... here in the UK.

                                R 1 Reply Last reply
                                0
                                • 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

                                  R 1 Reply Last reply
                                  0
                                  • 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:

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