Measurement estimates from a single vantage point — not a compliance certification. Guidance below is for operators, not an SLA.
DNS
Dual-stack
[2] 6/6/6 [O]
Meaning: Shows how many authoritative name servers exist, and how many IPv6 endpoints are configured, responsive, and operational.
IPv4 6/6/6 · IPv6 6/6/6 · location O
| Host | IPv4 | IPv6 | Probes |
|---|
kurt.ns.cloudflare.com [O] |
108.162.193.193, 172.64.33.193, 173.245.59.193 |
2a06:98c1:50::ac40:21c1, 2803:f800:50::6ca2:c1c1, 2606:4700:58::adf5:3bc1 |
ipv4 108.162.193.193 ok; ipv4 172.64.33.193 ok; ipv4 173.245.59.193 ok; ipv6 2a06:98c1:50::ac40:21c1 ok; ipv6 2803:f800:50::6ca2:c1c1 ok; ipv6 2606:4700:58::adf5:3bc1 ok; |
lady.ns.cloudflare.com [O] |
172.64.32.127, 108.162.192.127, 173.245.58.127 |
2a06:98c1:50::ac40:207f, 2803:f800:50::6ca2:c07f, 2606:4700:50::adf5:3a7f |
ipv4 172.64.32.127 ok; ipv4 108.162.192.127 ok; ipv4 173.245.58.127 ok; ipv6 2a06:98c1:50::ac40:207f ok; ipv6 2803:f800:50::6ca2:c07f ok; ipv6 2606:4700:50::adf5:3a7f ok; |
Mail
Dual-stack
[5 MX] v4 smtp 5/5/5 v6 smtp 5/5/5 [O]
Meaning: Shows MX footprint and SMTP health per IP family. Operational means an SMTP banner and EHLO exchange succeeded on port 25.
IPv4 SMTP 5/5/5 · IPv6 5/5/5 · location O
| Host | IPv4 | IPv6 | Probes |
|---|
alt3.aspmx.l.google.com [O] |
172.253.145.27 |
2607:f8b0:4023:3003::1a |
ipv4 172.253.145.27 ok; ipv6 2607:f8b0:4023:3003::1a ok; |
alt2.aspmx.l.google.com [O] |
172.217.216.26 |
2607:f8b0:4023:2803::1a |
ipv4 172.217.216.26 ok; ipv6 2607:f8b0:4023:2803::1a ok; |
alt1.aspmx.l.google.com [O] |
192.178.231.27 |
2607:f8b0:4023:200d::1b |
ipv4 192.178.231.27 ok; ipv6 2607:f8b0:4023:200d::1b ok; |
alt4.aspmx.l.google.com [O] |
172.253.135.27 |
2607:f8b0:4023:1015::1b |
ipv4 172.253.135.27 ok; ipv6 2607:f8b0:4023:1015::1b ok; |
aspmx.l.google.com [O] |
74.125.142.26 |
2607:f8b0:400e:c00::1b |
ipv4 74.125.142.26 ok; ipv6 2607:f8b0:400e:c00::1b ok; |
Web
Dual-stack
[1] 3/3/3 [I]
Meaning: Shows IPv6 web endpoint readiness for the discovered HTTPS host. Operational means family-specific HTTPS requests complete successfully.
IPv4 3/3/3 · IPv6 3/3/3 · location I
| Host | IPv4 | IPv6 | Probes |
|---|
cmi.edu [I] |
172.67.74.158, 104.26.10.74, 104.26.11.74 |
2606:4700:20::681a:b4a, 2606:4700:20::681a:a4a, 2606:4700:20::ac43:4a9e |
ipv4 ok; ipv6 ok; |
DNSSEC
Unsigned
U/-/-
Meaning: Shows whether DNSKEY data is observed at the apex (signed), absent (unsigned), or unavailable due to lookup error.
Apex DNSKEY presence only — not full chain validation.
Analyze on DNSViz
📌 Action item(s):
- Enable DNSSEC signing and publish a DNSKEY at the apex. Use DNSViz to validate the full chain.
DMARC
p=quarantine, sp=none
p=quarantine, sp=none — published organizational policy. Ask receivers to quarantine failing mail; reject is stronger.
Meaning: Published DMARC policy at _dmarc.cmi.edu (DNS TXT). Shows organizational policy (p=) and subdomain policy (sp=) when set.
Record at _dmarc.cmi.edu:
v=DMARC1;p=quarantine;sp=none;adkim=r;aspf=r;pct=100;fo=0;rf=afrf;ri=86400;rua=mailto:dc3dd551d235495f89ee95ef6590a623@dmarc-reports.cloudflare.net,mailto:admin@cmi.edu;ruf=mailto:admin@cmi.edu
Policy publication only — SPF/DKIM not measured. Not part of the 0–4 row score.
Check on dmarcian
📌 Action item(s):
- Tighten DMARC toward p=reject when ready. Review on dmarcian.