17 Apr
2018
17 Apr
'18
6:27 a.m.
Hi Ronen,
What I am saying is that there are 5 authoritative DNS servers for ddns.net
<http://ddns.net/> but they are not all updating together, two of their servers do
not hold the A record for your host, so it is ddns.net <http://ddns.net/> that needs
to sort their servers out and ensure that all their servers update whenever a host is
changed.
It was just “bad luck” that the Portal queried one of the servers that does not have your
hostname.
It was “good luck” that you queried one of the servers that does have your hostname.
Any recursive nameserver will lookup the authoritative name servers for the domain first,
in the case of ddns.net <http://ddns.net/> there are five, it then selects one of
them (could be any one) and asks it for the A record - if by chance it asks one that does
not hold your record it will get a response that the hostname does not exist.
Regards,
Chris
> On 17 Apr 2018, at 11:00, R P <ronenp(a)hotmail.com> wrote:
>
> look here ...
>
>> gilboa-gw.ddns.net
> Server: 1dot1dot1dot1.cloudflare-dns.com
> Address: 1.1.1.1
>
> Non-authoritative answer:
> Name: gilboa-gw.ddns.net
> Address: 109.65.68.149
>
>
> What servers the portal look at ?
> Maybe you should point it to more quick update server ?
> it is needed specially for dynamic address based gateway to get their new address
as quick as possible in case of address change
> Ronen - 4Z4ZQ
>
> ________________________________
> From: 44Net <44net-bounces+ronenp=hotmail.com(a)mailman.ampr.org> on behalf of
G1FEF via 44Net <44net(a)mailman.ampr.org>
> Sent: Tuesday, April 17, 2018 2:54 AM
> To: AMPRNet working group
> Cc: G1FEF
> Subject: Re: [44net] Unable to rsolve host error in the portal
>
>
>> On 17 Apr 2018, at 10:27, R P <ronenp(a)hotmail.com> wrote:
>>
>> Hi
>> I have entered new ddns.net name to one of the gateways i have installed and
while pressing the save button got "unable to resolve host" error
>> The name is resolvable ...
>> Is the Portal lazy ?
>> Any info is welcome
>> Ronen - 4Z4ZQ
>
> Looks like ddns.net does not update all it’s authoritative servers at the same time,
this is from the portal server:
>
>
> [chris@portal ~]# nslookup gilboa-gw.ddns.net
> Server: 192.168.1.1
> Address: 192.168.1.1#53
>
> Non-authoritative answer:
> *** Can't find gilboa-gw.ddns.net: No answer
>
>
> [chris@portal ~]# dig ddns.net ns
>
> ; <<>> DiG 9.9.4-RedHat-9.9.4-51.el7_4.2 <<>> ddns.net ns
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 21964
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 7
>
> ;; OPT PSEUDOSECTION:
> ; EDNS: version: 0, flags:; udp: 4096
> ;; QUESTION SECTION:
> ;ddns.net. IN NS
>
> ;; ANSWER SECTION:
> ddns.net. 19616 IN NS nf5.no-ip.com.
> ddns.net. 19616 IN NS nf2.no-ip.com.
> ddns.net. 19616 IN NS nf1.no-ip.com.
> ddns.net. 19616 IN NS nf4.no-ip.com.
> ddns.net. 19616 IN NS nf3.no-ip.com.
>
> ;; ADDITIONAL SECTION:
> nf1.no-ip.com. 4789 IN A 50.31.129.129
> nf1.no-ip.com. 5 IN AAAA 2001:1838:f002::129
> nf2.no-ip.com. 688 IN A 165.254.162.241
> nf3.no-ip.com. 16855 IN A 69.65.40.108
> nf4.no-ip.com. 10583 IN A 50.31.129.129
> nf5.no-ip.com. 1719 IN A 50.31.129.129
>
> ;; Query time: 3 msec
> ;; SERVER: 192.168.1.1#53(192.168.1.1)
> ;; WHEN: Tue Apr 17 09:47:38 UTC 2018
> ;; MSG SIZE rcvd: 244
>
>
> [chris@portal ~]# dig @nf1.no-ip.com gilboa-gw.ddns.net a
>
> ; <<>> DiG 9.9.4-RedHat-9.9.4-51.el7_4.2 <<>> @nf1.no-ip.com
gilboa-gw.ddns.net a
> ; (2 servers found)
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 8921
> ;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
>
> ;; OPT PSEUDOSECTION:
> ; EDNS: version: 0, flags:; udp: 4096
> ;; QUESTION SECTION:
> ;gilboa-gw.ddns.net. IN A
>
> ;; ANSWER SECTION:
> gilboa-gw.ddns.net. 60 IN A 109.65.68.149
>
> ;; Query time: 15 msec
> ;; SERVER: 50.31.129.129#53(50.31.129.129)
> ;; WHEN: Tue Apr 17 09:47:44 UTC 2018
> ;; MSG SIZE rcvd: 63
>
>
> [chris@portal ~]# dig @nf2.no-ip.com gilboa-gw.ddns.net a
>
> ; <<>> DiG 9.9.4-RedHat-9.9.4-51.el7_4.2 <<>> @nf2.no-ip.com
gilboa-gw.ddns.net a
> ; (1 server found)
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 59618
> ;; flags: qr aa rd; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1
>
> ;; OPT PSEUDOSECTION:
> ; EDNS: version: 0, flags:; udp: 4096
> ;; QUESTION SECTION:
> ;gilboa-gw.ddns.net. IN A
>
> ;; AUTHORITY SECTION:
> ddns.net. 1800 IN SOA nf1.no-ip.com. hostmaster.no-ip.com.
2180056495 10800 1800 604800 1800
>
> ;; Query time: 80 msec
> ;; SERVER: 165.254.162.241#53(165.254.162.241)
> ;; WHEN: Tue Apr 17 09:47:48 UTC 2018
> ;; MSG SIZE rcvd: 107
>
>
> [chris@portal ~]# dig @nf3.no-ip.com gilboa-gw.ddns.net a
>
> ; <<>> DiG 9.9.4-RedHat-9.9.4-51.el7_4.2 <<>> @nf3.no-ip.com
gilboa-gw.ddns.net a
> ; (1 server found)
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 9086
> ;; flags: qr aa rd; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1
>
> ;; OPT PSEUDOSECTION:
> ; EDNS: version: 0, flags:; udp: 4096
> ;; QUESTION SECTION:
> ;gilboa-gw.ddns.net. IN A
>
> ;; AUTHORITY SECTION:
> ddns.net. 1800 IN SOA nf1.no-ip.com. hostmaster.no-ip.com.
2180211990 10800 1800 604800 1800
>
> ;; Query time: 106 msec
> ;; SERVER: 69.65.40.108#53(69.65.40.108)
> ;; WHEN: Tue Apr 17 09:47:52 UTC 2018
> ;; MSG SIZE rcvd: 107
>
>
> [chris@portal ~]# dig @nf4.no-ip.com gilboa-gw.ddns.net a
>
> ; <<>> DiG 9.9.4-RedHat-9.9.4-51.el7_4.2 <<>> @nf4.no-ip.com
gilboa-gw.ddns.net a
> ; (1 server found)
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 54672
> ;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
>
> ;; OPT PSEUDOSECTION:
> ; EDNS: version: 0, flags:; udp: 4096
> ;; QUESTION SECTION:
> ;gilboa-gw.ddns.net. IN A
>
> ;; ANSWER SECTION:
> gilboa-gw.ddns.net. 60 IN A 109.65.68.149
>
> ;; Query time: 17 msec
> ;; SERVER: 50.31.129.129#53(50.31.129.129)
> ;; WHEN: Tue Apr 17 09:47:55 UTC 2018
> ;; MSG SIZE rcvd: 63
>
>
> [chris@portal ~]# dig @nf5.no-ip.com gilboa-gw.ddns.net a
>
> ; <<>> DiG 9.9.4-RedHat-9.9.4-51.el7_4.2 <<>> @nf5.no-ip.com
gilboa-gw.ddns.net a
> ; (1 server found)
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 56508
> ;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
>
> ;; OPT PSEUDOSECTION:
> ; EDNS: version: 0, flags:; udp: 4096
> ;; QUESTION SECTION:
> ;gilboa-gw.ddns.net. IN A
>
> ;; ANSWER SECTION:
> gilboa-gw.ddns.net. 60 IN A 109.65.68.149
>
> ;; Query time: 16 msec
> ;; SERVER: 50.31.129.129#53(50.31.129.129)
> ;; WHEN: Tue Apr 17 09:47:58 UTC 2018
> ;; MSG SIZE rcvd: 63
>
>
> The name servers the Portal uses must have queried one of ddns’s name servers that
don’t have the A record yet.
>
> Regards,
> Chris
>
>
>
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