Mxtoobox: Loop detected! We were referred back to IP
I followed the tutorial for DNSSEC found in https://www.digitalocean.com/community/tutorials/how-to-setup-dnssec-on-an-authoritative-bind-dns-server--2
Here is my zone file:
$ORIGIN .
$TTL 86400 ; 1 day
example.net IN SOA ns1.example.net. root.mailserver.net. (
2016091915 ; serial
43200 ; refresh (12 hours)
300 ; retry (5 minutes)
1209600 ; expire (2 weeks)
86400 ; minimum (1 day)
)
NS ns1.example.net.
NS ns2.example.net.
$TTL 60 ; 1 minute
A ...
$TTL 86400 ; 1 day
TXT ...
DNSKEY 256 3 7 ...
DNSKEY 257 3 7...
$ORIGIN example.net.
ns1 A VPS_IP
ns2 A VPS_IP
In godaddy, I created two hosts (ns1.example.net and ns2.example.net), both linked to the same ip VPS_IP. The zone is configured in a VPS of ip VPS_IP. Almost everything works, I can successfuly query A and records of my zone, that are correctly ponting to the desired ip. I checked with (mxtoolbox.com), using 'dns:example.net', and everything is fine, except for a warning saying the nameservers are part of the same subnet (expected since they are the same VPS_IP). However, when I use (mxtoolbox.com) to check for dns key (dnskey:example.net) I get this message: Loop detected! We were referred back to 'VPS_IP'. All other queries using mxtoolbox.com is fine. Also, when I try to add the DS records in godaddy, I have this error:
We are unable to validate your data at this time. Please try again later. If the problem persists, contact customer support.
Are both errors related? What could be wrong in my zone file to get that error from mxtoolbox?
Answer
Turn out that the problem is in using the same host for nameserver. They must be different.