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Re: DNS server won't talk to me

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On 4/19/18 7:44 PM, Francois Gouget wrote:
> So I'm running a bind server and while it works I ran into a domain name
> that it refuses to resolve: maibokun.com.
>
> Digging into it, it looks like one DNS server is refusing to talk to me:
>
> On my box:
> $ host maibokun.com
> ;; connection timed out; no servers could be reached
> $ host maibokun.com 210.143.111.171
> ;; connection timed out; no servers could be reached
>
> Same thing on my laptop. But if I connect the laptop to another Wifi
> network (thus changing it public IP address) or run the command on a
> computer on the other side of the atlantic I get:
>
> $ host maibokun.com
> maibokun.com has address 210.188.220.102
> maibokun.com mail is handled by 10 mail.maibokun.com.
> $ host maibokun.com 210.143.111.171
> Using domain server:
> Name: 210.143.111.171
> Address: 210.143.111.171#53
> Aliases:
>
> maibokun.com has address 210.188.220.102
> maibokun.com mail is handled by 10 mail.maibokun.com.
>
>
> Are DNS servers banning queries from some residential addresses or
> something like this? Anyone else seeing the same issue?
>
>
Try having bind forward the requests to another public DNS server like opendns.  
You could even protect yourself by having opendns block malware and other bad 
sites.   My bind named.conf.options file has the forwarding setup like this.

         forwarders {
         // opendns
         //        208.67.222.222;
         //        208.67.220.220;
         127.0.2.1;
         };
         forward only;

If you are really worried that your DNS queries are being diverted by man in the 
middle attacks use dnscrypt-proxy.  I have dnscrypt-proxy listening on 127.0.2.1 
(as above shows) and forwarding bind's DNS queries to opendns (cisco) over a 
secure channel.  I even redirect all DNS (port 53 udp) queries to any server to 
my bind with a shorewall redirect rule (firewall).

This setup returns this from a host command:

host  maibokun.com
maibokun.com has address 210.188.220.102
maibokun.com mail is handled by 10 mail.maibokun.com.


-- 


*...Bob*

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Thread

DNS server won't talk to me Francois Gouget <fgouget@free.fr> - 2018-04-20 01:50 +0200
  Re: DNS server won't talk to me Bob Weber <bobrweber@gmail.com> - 2018-04-20 02:10 +0200
  Re: DNS server won't talk to me Glenn English <ghe2001@gmail.com> - 2018-04-20 02:20 +0200
    Re: DNS server won't talk to me Francois Gouget <fgouget@free.fr> - 2018-04-20 13:00 +0200
      Re: DNS server won't talk to me Greg Wooledge <wooledg@eeg.ccf.org> - 2018-04-20 15:00 +0200
      Re: DNS server won't talk to me Glenn English <ghe2001@gmail.com> - 2018-04-20 17:10 +0200
        Re: DNS server won't talk to me Greg Wooledge <wooledg@eeg.ccf.org> - 2018-04-20 17:30 +0200
          Re: DNS server won't talk to me Francois Gouget <fgouget@free.fr> - 2018-04-25 12:00 +0200

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