Bind99 stopped resolving for external queries [SOLVED]

Unga unga888 at yahoo.com
Wed Nov 21 18:12:09 UTC 2012


> From: Unga <unga888 at yahoo.com>
> To: Ilya Kazakevich <kazakevichilya at gmail.com>
> Cc: "freebsd-questions at freebsd.org" <freebsd-questions at freebsd.org>
> Sent: Wednesday, November 21, 2012 3:36 PM
> Subject: Re: Bind99 stopped resolving for external queries
> 
> Hi IIya
> 
> Thank you for your reply. 
> 
>> Hello, 
> 
>> 
>> 
>> 
>>> From my laptop if I ping the server:
>>> ping www.mydoamin.com
>>> ping: cannot resolve www.mydoamin.com: Host name lookup failure
>>> 
>>> But if I log in to the server and do the same ping, it works fine.
>>> 
>>> 
>> 
>> 
>> 1) check your laptop is configured to work with this DNS server (cat 
> /etc/resolv.conf on laptop or "ipconfig /all | findstr DNS" in case of 
> windows )
> 
> My laptop and the server are in two different countries. Btw, laptop also run 
> FreeBSD.
> 
> 
> 
>> 2) check server is accessible (ping <YOUR_SERVER_IP> from laptop)
> 
> Yes, the server is accessible (ping <YOUR_SERVER_IP> from the laptop.
> 
> 
>> 3) check server is accessible via TCP/53 
> ("telnet <YOUR_SERVER_IP> 53" from your laptop) 
> 
> No, there was a reverse DNS error here. It was pointing to the Reverse DNS 
> server of the data centre.
> 
> Now its been corrected:
> 
> telnet <YOUR_SERVER_IP> 53
> Trying <YOUR_SERVER_IP>...
> Connected to ns1.mydomain.com.
> Escape character is '^]'.
> 
>> 4) check firewall on server and/or devices between server and laptop, it may 
> block requests
> 
> No firewall on the server yet. 
> 
> 
>> 5) check your server is configured to use the same DNS: cat 
> /etc/resolv.conf 
>> 
> nameserver 127.0.0.1
> nameserver other_ip1
> nameserver other_ip2
> 
> 
> Although the Reverse DNS is now been corrected, still cannot ping as from the 
> laptop:
> ping www.mydomain.com
> ping: cannot resolve www.mydomain.com: Host name lookup failure
> 
> Any ideas?
> 
> Regards
> Unga
> 

Hi all

Found the problem. The domain name was expired 2 days ago. That was the last thing I expected :)

Best regards
Unga


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