DNS Spy
Connectivity: 100%
The following nameservers are available and responding correctly for DNS queries for your domain hsleiden.nl.
| Nameserver | IP address(es) | SOA serial |
|---|---|---|
| ns1.surfnet.nl. |
192.87.106.101
2001:610:1:800a:192:87:106:101 |
2025062613 |
| ns1.zurich.surf.net. |
195.176.255.9
2001:620:0:9::1103 |
2025062613 |
| ns2.surfnet.nl. |
192.87.36.2
2001:610:3:200a:192:87:36:2 |
2025062613 |
| ns3.surfnet.nl. |
195.169.124.71
2001:610:0:800c:195:169:124:71 |
2025062613 |
Good news, no warnings or errors were found.
We could not find any recommendations at this time.
Good news, we detected the following achievements in your DNS configuration. Each of these checks has increased your DNS Spy score.
- All nameservers reply with the same SOA serial number.
- The nameserver IPs are distributed across multiple subnets.
- All nameservers are online.
- Nameservers are available over IPv4.
- Nameservers are available over IPv6.
Performance: 100%
We tested each nameserver and measured the following response times.
| Nameserver | IP address(es) | Response time |
|---|---|---|
| ns1.surfnet.nl. |
192.87.106.101
2001:610:1:800a:192:87:106:101 |
91ms
1ms |
| ns1.zurich.surf.net. |
195.176.255.9
2001:620:0:9::1103 |
1ms
1ms |
| ns2.surfnet.nl. |
192.87.36.2
2001:610:3:200a:192:87:36:2 |
1ms
1ms |
| ns3.surfnet.nl. |
195.169.124.71
2001:610:0:800c:195:169:124:71 |
1ms
1ms |
Good news, no warnings or errors were found.
We detected some possible recommendations for you to consider. No penalties were given for these, but resolving them can give you a higher DNS score.
- Nameserver ns1.surfnet.nl. (192.87.106.101) replied reasonably fast (< 150ms), but you should aim for < 50ms response times.
Good news, we detected the following achievements in your DNS configuration. Each of these checks has increased your DNS Spy score.
- Nameserver ns1.surfnet.nl. (2001:610:1:800a:192:87:106:101) replied in a reasonable time.
- Nameserver ns1.zurich.surf.net. (195.176.255.9) replied quickly (< 50ms).
- Nameserver ns1.zurich.surf.net. (2001:620:0:9::1103) replied in a reasonable time.
- Nameserver ns2.surfnet.nl. (192.87.36.2) replied quickly (< 50ms).
- Nameserver ns2.surfnet.nl. (2001:610:3:200a:192:87:36:2) replied in a reasonable time.
- Nameserver ns3.surfnet.nl. (195.169.124.71) replied quickly (< 50ms).
- Nameserver ns3.surfnet.nl. (2001:610:0:800c:195:169:124:71) replied in a reasonable time.
Resilience & Security: 100%
These are the locations and providers of your nameservers.
| Nameserver | Location | ISP |
|---|---|---|
| ns1.surfnet.nl. |
IPv4: NL
IPv6: NL |
AS1103 - SURFNET-NL SURFnet, The Netherlands, NL
AS1103 - SURFNET-NL SURFnet, The Netherlands, NL |
| ns1.zurich.surf.net. |
IPv4: CH
IPv6: CH |
AS559 - SWITCH Peering requests: [email protected], CH
AS559 - SWITCH Peering requests: [email protected], CH |
| ns2.surfnet.nl. |
IPv4: NL
IPv6: NL |
AS1103 - SURFNET-NL SURFnet, The Netherlands, NL
AS1103 - SURFNET-NL SURFnet, The Netherlands, NL |
| ns3.surfnet.nl. |
IPv4: NL
IPv6: NL |
AS1103 - SURFNET-NL SURFnet, The Netherlands, NL
AS1103 - SURFNET-NL SURFnet, The Netherlands, NL |
Good news, no warnings or errors were found.
We could not find any recommendations at this time.
Good news, we detected the following achievements in your DNS configuration. Each of these checks has increased your DNS Spy score.
- You have more than 1 nameserver.
- The IPv4 nameservers are distributed among multiple providers.
- The IPv4 nameservers are distributed across multiple locations.
- The IPv6 nameservers are distributed among multiple providers.
- The IPv6 nameservers are distributed across multiple locations.
- DNSSEC is enabled.
- CAA records found.
- The nameservers are being operated from multiple domains (surfnet.nl, surf.net).
DNS records: 94%
Our scans detected the following publicly available DNS records.
| Record | TTL | Value | |
|---|---|---|---|
| A | hsleiden.nl | 3h | 145.97.19.146 |
| CAA | hsleiden.nl | 3h |
hsleiden.nl. 10800 IN CAA 0 iodef "mailto:[email protected]" hsleiden.nl. 10800 IN CAA 0 issue "harica.gr" |
| DNSKEY | hsleiden.nl | 1h | UNKNOWN | UNKNOWN | DNSKEY 257 3 13 6H2UHULISbXx5aTe9MLJU9khlt6pqnKtEf6uSBc0msk9Ocmbwohb7B0gbtGVQIOwnPk0R7H5F0LiT1fBZlK4/A== |
| MX | hsleiden.nl | 3h | 0 hsleiden-nl.mail.protection.outlook.com. |
| NS | hsleiden.nl | 3h |
ns1.surfnet.nl. ns1.zurich.surf.net. ns2.surfnet.nl. ns3.surfnet.nl. |
| SOA | hsleiden.nl | 3h | ns1.surfnet.nl. dns-beheer.surfnet.nl. 2025062613 86400 3600 604800 86400 |
| TXT | hsleiden.nl | 3h |
"HARICA-j8zH7tOhEUwCw8oDKi7" "MS=ms57848078" "RttGVR43n1XfrNyaKFk14JgY22SjeT1ON+Pmji6GMFVzVxX0dHPpCZxZqM5ZL/IasVFOjDiboU0qEZkFw3dFeQ==" "apple-domain-verification=L1x0sLQjk7CKFSZ3" "google-site-verification=7b_BJihKMERLEH-f7uNXmRtyTyAEqvLcadP0C_1NCTU" "google-site-verification=8CDmV75AnPItpPFFV69ZPa7KkOoDtNr0fCod1YJWcUo" "google-site-verification=I1VNTxWkWZ1daZHeMoEptY18Pbh_BAIE97dyNSwBzow" "v=spf1 include:spf.protection.outlook.com include:_spf.surfmailfilter.nl ip4:145.97.19.16 ~all" |
| TXT | _dmarc.hsleiden.nl | 3h | "v=DMARC1; p=reject; sp=reject; rua=mailto:[email protected]; adkim=s; aspf=s;" |
| SRV | _sip._tls.hsleiden.nl | 24h | 1 100 443 sipdir.online.lync.com. |
| SRV | _sipfederationtls._tcp.hsleiden.nl | 24h | 0 100 5061 sipfed.online.lync.com. |
| CNAME | autodiscover.hsleiden.nl | 3h | autodiscover.outlook.com |
| CNAME | beta.hsleiden.nl | 3h | beta.hsleiden.nl.cdn.cloudflare.net |
| CNAME | cms.hsleiden.nl | 3h | cms.hsleiden.nl.cdn.cloudflare.net |
| CNAME | enterpriseenrollment.hsleiden.nl | 24h | enterpriseenrollment.manage.microsoft.com |
| CNAME | enterpriseregistration.hsleiden.nl | 24h | enterpriseregistration.windows.net |
| A | info.hsleiden.nl | 24h | 85.17.2.22 |
| A | intranet.hsleiden.nl | 3h | 145.97.19.146 |
| CNAME | lyncdiscover.hsleiden.nl | 24h | webdir.online.lync.com |
| CNAME | selector1._domainkey.hsleiden.nl | 3h | selector1-hsleiden-nl._domainkey.hogeschoolleiden.onmicrosoft.com |
| CNAME | selector2._domainkey.hsleiden.nl | 3h | selector2-hsleiden-nl._domainkey.hogeschoolleiden.onmicrosoft.com |
| CNAME | sip.hsleiden.nl | 24h | sipdir.online.lync.com |
| A | webmail.hsleiden.nl | 3h | 145.97.19.146 |
| CNAME | www.hsleiden.nl | 3h | www.hsleiden.nl.cdn.cloudflare.net |
We detected the following errors or warnings about your DNS configuration. These caused your DNS rating to be lowered. Resolving these will grant a higher DNS Spy rating for your domain.
- We only detected 1 MX record. Multiple MX records (or multiple IPs behind the MX record) provide redundancy and a more robust e-mail setup.
We detected some possible recommendations for you to consider. No penalties were given for these, but resolving them can give you a higher DNS score.
- No IPv6 record has been found on the zone apex (hsleiden.nl). Consider enabling IPv6 in the infrastructure by adding an AAAA record on this domain.
Good news, we detected the following achievements in your DNS configuration. Each of these checks has increased your DNS Spy score.
- The MX record for "hsleiden.nl" has a long TTL (1h+).
- The NS records have a long TTL (1h+).
- Your SOA serial number follows the best practice YYYYMMDDxx format.
- SPF records have been found.
- SPF records are set up restrictively.
- DMARC records have been found.
- DMARC records are set up restrictively.
- Found a root (apex) DNS record.
- Found a www DNS record.
- The active nameservers match the NS records.
- The DNS records appear to be RFC compliant.
Have a look at other public DNS scans.