bordeaux-metropole.fr

Delegation · None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.

Nameservers · These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: nsa.alienor.net: "PowerDNS Authoritative Server 4.4.1"; nsb.alienor.net: "PowerDNS Authoritative Server 4.4.1"; nsc.alienor.net: "PowerDNS Authoritative Server 4.4.1". 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 (4m56s). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1h and in the zone 2h; resolvers may use either.

Records · These CAA tags are not defined: wild. CAs must refuse to issue when an unknown tag is marked critical.

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.

DKIM · 1024-bit RSA keys are the minimum and are considered weak today: s2 (1024 bits). Rotate to a 2048-bit key.

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.