Your NS records at the parent servers are:
ns1.surfnet.nl. [192.87.106.101] [TTL=7200] [EU]
ns.nl.net. [193.78.240.1 (NO GLUE)] [NL]
ns.domain-registry.nl. [193.176.144.2] [TTL=7200] [NL]
....
FAIL No NS A records at nameservers WARNING: Your nameservers do not include any corresponding A records when asked for your NS records. They probably are not returning the A records when asked, which can prevent some other DNS servers from contacting your DNS servers. They should do this if they are authoritative for those A records (in BIND, you should not use 'minimal-responses yes;'). The problem record(s) are:
Nameserver 193.78.240.1 did not provide IPs for all NS records.
.....
FAIL Missing (stealth) nameservers FAIL: You have one or more missing (stealth) nameservers. The following nameserver(s) are listed (at your nameservers) as nameservers for your domain, but are not listed at the parent nameservers (therefore, they may or may not get used, depending on whether your DNS servers return them in the authority section for other requests, per RFC2181 5.4.1). You need to make sure that these stealth nameservers are working; if they are not responding, you may have serious problems! The DNSreport will not query these servers, so you need to be very careful that they are working properly.
ns2.nic.nl.
This is listed as an ERROR because there are some cases where nasty problems can occur (if the TTLs vary from the NS records at the root servers and the NS records point to your own domain, for example).
...
192.87.106.101: "BIND9 -
dns-beheer@surfnet.nl"
193.78.240.1: No version info available (refused).
193.176.144.2: "9.3.2-P2"
FAIL Stealth NS record leakage Your DNS servers leak stealth information in non-NS requests:
Stealth nameservers are leaked [ns2.nic.nl.]!