spectrum.com

Delegation · The nameservers at the parent and in the zone should be the same. Only at the parent: ns1.charter.com, ns2.charter.com, ns3.charter.com, ns4.charter.com; only in the zone: a1-187.akam.net, a11-66.akam.net, a12-66.akam.net, a18-65.akam.net, a2-65.akam.net, a7-66.akam.net. a1-187.akam.net, a11-66.akam.net, a12-66.akam.net, a18-65.akam.net, a2-65.akam.net, a7-66.akam.net, ns1.charter.com, ns2.charter.com, ns3.charter.com, ns4.charter.com report NS a1-187.akam.net a11-66.akam.net a12-66.akam.net a18-65.akam.net a2-65.akam.net a7-66.akam.net.

Nameservers · These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: a1-187.akam.net: "41824.6"; a1-187.akam.net: "41824.10"; a11-66.akam.net: "41824.8"; a11-66.akam.net: "41824.4"; a12-66.akam.net: "48878.27"; a12-66.akam.net: "48878.30"; a18-65.akam.net: "48878.33"; a18-65.akam.net: "48878.31"; a2-65.akam.net: "48878.30"; a2-65.akam.net: "48878.33"; a7-66.akam.net: "41824.7"; a7-66.akam.net: "41824.9". Hide or replace the version string.

DNSSEC · The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.

Records · These records have a TTL below 5m, causing extra queries and slower lookups: A (20s), AAAA (20s). Low TTLs are useful just before a planned change. The NS TTL at the parent is 2d and in the zone 12h; resolvers may use either.

DMARC · DMARC policy is set to 'quarantine'. Consider upgrading to 'reject' for stronger protection once you've verified legitimate emails are passing authentication.

DNSSEC · DNSSEC is not enabled for this domain. Consider enabling DNSSEC to protect against DNS spoofing attacks.

MX · Only one MX record found. For better email reliability, consider adding at least one backup MX server.

TLS · MTA-STS is not configured, so other mail servers fall back to unencrypted delivery when TLS fails or is stripped by an attacker. Publish a _mta-sts TXT record and a policy at https://mta-sts.<domain>/.well-known/mta-sts.txt.