sciencespo.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: nameserver03.reims.sciences-po.fr: "9.16.23-RH"; nameserver04.reims.sciences-po.fr: "9.16.23-RH". Hide or replace the version string.

SOA · refresh 15m is outside 20m–1d; retry 15m should be shorter than refresh 15m; expire 15m is shorter than 7d; secondaries stop answering too soon when the primary is down; expire 15m must be longer than refresh + retry. Current values: refresh 15m, retry 15m, expire 15m, negative TTL 15m.

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.

DMARC · DMARC policy only applies to 5% of failing mail (pct=5). Raise pct to 100 once you are confident in your setup.

DKIM · 1024-bit RSA keys are the minimum and are considered weak today: s1 (1024 bits). Rotate to a 2048-bit key.

DKIM · These keys only allow SHA-1 signatures (h=sha1), which receivers no longer accept (RFC 8301): s1. Remove the h= tag or use h=sha256.

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.