uho.edu.cu — Caribbean IPv6 Monitor

Score0/4

Overall IPv4-only

EconomyCuba

Collected2026-10-15 04:37 UTC

Measurement estimates from a single vantage point — not a compliance certification. Guidance below is for operators, not an SLA.

Priority next steps

Publish AAAA records for name server: ns1.uho.edu.cu, ns2.uho.edu.cu.
Publish AAAA records for mail (MX): mail.uho.edu.cu.
Publish AAAA records for web host: www.uho.edu.cu.
Enable DNSSEC signing and publish a DNSKEY at the apex. Use DNSViz to validate the full chain.
Tighten DMARC toward p=reject when ready. Review on dmarcian.

Checks

DNS

IPv4-only

[2] 0/0/0 [I]

Meaning: Shows how many authoritative name servers exist, and how many IPv6 endpoints are configured, responsive, and operational.

IPv4 2/2/2 · IPv6 0/0/0 · location I

Host	IPv4	IPv6	Probes
`ns1.uho.edu.cu` [I]	200.14.55.1	—	ipv4 200.14.55.1 ok;
`ns2.uho.edu.cu` [I]	200.55.148.26	—	ipv4 200.55.148.26 ok;

📌 Action item(s):

Publish AAAA records for name server: ns1.uho.edu.cu, ns2.uho.edu.cu.

Mail

IPv4-only

[1 MX] v4 smtp 1/1/1 v6 smtp 0/0/0 [I]

Meaning: Shows MX footprint and SMTP health per IP family. Operational means an SMTP banner and EHLO exchange succeeded on port 25.

IPv4 SMTP 1/1/1 · IPv6 0/0/0 · location I

Host	IPv4	IPv6	Probes
`mail.uho.edu.cu` [I]	200.14.55.1	—	ipv4 200.14.55.1 ok;

📌 Action item(s):

Publish AAAA records for mail (MX): mail.uho.edu.cu.

Web

IPv4-only

[1] 0/0/0 [I]

Meaning: Shows IPv6 web endpoint readiness for the discovered HTTPS host. Operational means family-specific HTTPS requests complete successfully.

IPv4 1/1/1 · IPv6 0/0/0 · location I

Host	IPv4	IPv6	Probes
`www.uho.edu.cu` [I]	200.55.148.26	—	ipv4 ok;

📌 Action item(s):

Publish AAAA records for web host: www.uho.edu.cu.

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.uho.edu.cu (DNS TXT). Shows organizational policy (p=) and subdomain policy (sp=) when set.

Record at _dmarc.uho.edu.cu:

v=DMARC1; p=quarantine; rua=mailto:nodo@uho.edu.cu; ruf=mailto:nodo@uho.edu.cu; sp=none; pct=100; fo=1;

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.