ensad.fr

Delegation · The nameservers at the parent and in the zone should be the same. Only at the parent: panoramix.rap.prd.fr. dns0.ensad.fr, dns1.ensad.fr report NS dns0.ensad.fr dns1.ensad.fr.

Delegation · all IPv4 addresses are in 194.254.227.0/24. A single network failure takes all nameservers down; RFC 2182 recommends topologically separate networks (anycast setups are an exception).

SOA · expire 2h is shorter than 7d; secondaries stop answering too soon when the primary is down; expire 2h must be longer than refresh + retry. Current values: refresh 8h, retry 2h, expire 2h, negative TTL 2h.

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.

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 · The following MX hosts could not be resolved to IPv6 addresses: mxa.relay.renater.fr, mxb.relay.renater.fr, mxc.relay.renater.fr, mxd.relay.renater.fr

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.