Mike, Thank you, I think that the issue is with the Mikrotik. I think I may have a manged stanza in the fire wall.. This got me aimed the right direction.
I have for the time being put in a home router with openWRT in it, it is doing fine now I will take my time and tear into the mikrotik and see what is going on. On Sat, Aug 26, 2017 at 2:03 AM, Mike C. <[email protected]> wrote: > On 8/24/17 8:40 AM, [email protected] wrote: > > Folks, > > I thought I had my Mikrotik router setup right, indeed it was doing just > > fine, I did > > an upgrade on it and all of a sudden my linux boxes no longer keep the > DNS > > When I first reboot the router it appears to tell everyone about DNS, I > can > > set > > for a while on my Linux boxen and go everywhere, then all of a sudden > each > > one of them no longer resolves, interesting thing is the Android devices > DO > > continue to resolve just fine. > > > > Anyone seen that one. I am running Mate on Ubuntu 16.04 all machines are > up > > to date as far as I know. > Here's how I'd go about troubleshooting this. > > When your Linux boxen can't get dns name resolution do the following. > 1. Go to cli and run the command "cat /etc/resolv.conf" > e.g. > cat /etc/resolv.conf > # Generated by NetworkManager > nameserver 8.8.8.8 > nameserver 8.8.4.4 > > 2. Is the nameserver ip addr the same ip addr of the microtik router? If > no, there's most likely a config problem. > > 3. If yes, ping the ip addr of the nameserver > > 4. If it doesn't respond, there's a network communication issue between > the two devices. > > 5. If it does respond, run the command, "nslookup google.com". Does the > command provide a non-authoritative answer? > e.g. > nslookup google.com > Server: 8.8.8.8 > Address: 8.8.8.8#53 > > Non-authoritative answer: > Name: google.com > Address: 216.58.193.78 > > 6. If no, login in to the Microtik and run the same command. > > 7. If the Microtik replies with a non-authoritative answer I'd take a > look at this thread about dnsmasq. > https://askubuntu.com/questions/131342/dnsmasq-sometimes-resolves-things- > sometimes-it-doesnt > > That should be a good start in running down this problem. > > > _______________________________________________ > PLUG mailing list > [email protected] > http://lists.pdxlinux.org/mailman/listinfo/plug > -- Chuck Hast -- KP4DJT -- I can do all things through Christ which strengtheneth me. Ph 4:13 KJV Todo lo puedo en Cristo que me fortalece. Fil 4:13 RVR1960 _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
