DNS & Email Security Report for crowdstrike.com

• A record presentcritical

  2 A record(s) found

• AAAA record presentrecommended

  2 AAAA record(s) found

• MX records presentrecommended

  2 MX record(s) found

• NS records presentcritical

  3 NS record(s) found

• SOA record presentcritical

  SOA record found

• Multiple nameserversrecommended

  3 nameservers configured ✓

• SOA serial formatinfo

  Serial 2406511745 (valid, managed DNS format)

• SOA timers validinfo

  Refresh: 10000s ✓, Retry: 2400s ✓, Expire: 604800s ✓

• No lame nameserversinfo

  3 NS all responding ✓

• Glue records presentinfo

  No glue needed

• WWW record configuredinfo

  A record matches apex

• MX servers have PTR recordsinfo

  1 MX IPs all have PTR records ✓

• MX servers have FCrDNSinfo

  1 MX IPs have forward-confirmed reverse DNS ✓

• DNSSEC signedrecommended

  DNSSEC is enabled ✓

• DNSSEC validation OKcritical

  DNSSEC validates correctly ✓

• NSEC3 RFC 9276 compliantrecommended

  Not applicable (domain uses NSEC or is not DNSSEC-signed)

• RRSIG signatures validrecommended

  RRSIG signature expires in 1 days — renewal needed

• Modern DNSSEC algorithmoptional

  ECDSA P-256 (algorithm 13) — modern ✓

• DS digest algorithm modernrecommended

  DS digest: SHA-256 — modern ✓

• DNSKEY algorithm secureoptional

  DNSKEY: ECDSA P-256 — modern ✓

• RRSIG TTL saferecommended

  Record TTLs do not exceed RRSIG validity periods ✓

• Chain of trust completecritical

  Complete chain: DNSKEY + DS + RRSIG ✓

• Website reachable via IPv6recommended

  2 AAAA record(s) ✓

• Mail servers reachable via IPv6recommended

  0/2 MX servers have IPv6. Add AAAA records for your mail servers

• Nameservers reachable via IPv6recommended

  3/3 NS server(s) with IPv6 ✓

• SPF record presentcritical

  v=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com ~all

• SPF syntax validcritical

  SPF syntax is correct ✓

• SPF policy strict (-all)recommended

  SPF uses ~all or ?all. Change to -all for strict enforcement

• DKIM foundrecommended

  DKIM selector: default ✓

• DMARC record presentrecommended

  v=DMARC1; p=reject; fo=1; ri=3600; rua=mailto:[email protected],mailto:[email protected]; ruf=mailto:[email protected],mailto:[email protected]

• DMARC policy quarantine or betterrecommended

  DMARC policy: reject ✓

• DMARC policy rejectoptional

  DMARC policy: reject ✓

• BIMI record presentoptional

  BIMI logo: https://bimi-assets.has.pphosted.com/default._bimi.crowdstrike.com.svg

• BIMI configuration validoptional

  BIMI correctly configured ✓

• MTA-STS record presentoptional

  MTA-STS configured ✓

• MTA-STS policy enforcedoptional

  MTA-STS mode: enforce ✓

• MX records validcritical

  2 MX record(s) ✓

• MX domains use DNSSECrecommended

  1/1 MX domain(s) use DNSSEC ✓

• MX DNSSEC validation OKrecommended

  MX DNSSEC validates correctly ✓

• Mail servers not blacklistedcritical

  1 MX server(s) checked against 16 blacklists - clean ✓

• No critical blacklist listingscritical

  No blacklist listings ✓

• CAA records presentrecommended

  No CAA records. Add CAA record to specify allowed certificate authorities

• CAA policy strictoptional

  CAA not strict. Add CAA 0 issue "letsencrypt.org" (or your CA) to restrict issuance

• TLSA records (DANE)optional

  No TLSA/DANE records. Add TLSA at _25._tcp.mail for DANE email encryption

• DANE configuration validoptional

  No DANE configured

• No sensitive info in TXTcritical

  No sensitive data leaked ✓

• Verification records reviewedinfo

  11 verification records found (Google, Apple, Adobe IDP, Atlassian, Microsoft 365...). Review these - they reveal your tech stack to attackers. Remove unused service verifications

• HTTPS availablecritical

  HTTPS working (status 200) ✓

• Valid certificatecritical

  Certificate chain is valid and trusted ✓

• HTTP redirects to HTTPScritical

  HTTP automatically redirects to HTTPS ✓

• HSTS enabledrecommended

  HSTS enabled (max-age=31536000, includeSubDomains) ✓

• HSTS max-age >= 1 yearoptional

  max-age=31536000 (≥1 year) ✓

• X-Frame-Options headerrecommended

  X-Frame-Options: ALLOW-FROM https://crowdstrike.pathfactory.com https://crowdstrike.com https://www.crowdstrike.co.uk https://go.crowdstrike.com https://store.crowdstrike.com ✓

• X-Content-Type-Options headerrecommended

  X-Content-Type-Options: nosniff ✓

• Content-Security-Policy headerrecommended

  Content-Security-Policy configured ✓

• Referrer-Policy headerrecommended

  Referrer-Policy: strict-origin-when-cross-origin ✓

• security.txt presentoptional

  Contact: mailto:[email protected]

• security.txt validoptional

  security.txt has required Contact and Expires fields ✓

• HTTP/3 (QUIC) supportedoptional

  HTTP/3 (QUIC v1) on port 443 Detection methods: QUIC probe: QUIC v1 (RFC 9000) (9ms)

• QUIC UDP reachableoptional

  QUIC reachable on UDP/443 (9ms) — QUIC v1 (RFC 9000) ✓

• HTTPS DNS record (SVCB)optional

  HTTPS record found but no h3 ALPN (h2)

Add CAA records

Define which Certificate Authorities may issue SSL certificates, for example: "0 issue letsencrypt.org"

Impact: Prevents unauthorized certificate issuance

IPv6 for mail servers

Add AAAA records for your MX servers to support email via IPv6.

Impact: Improves email reachability for IPv6 networks

Review verification TXT records

Your domain has many third-party verification records that reveal your tech stack (Google, Microsoft, Atlassian, etc.). Review each one: 1) Remove records for services no longer used 2) Consider if each service really needs domain verification 3) Use a subdomain for less critical services. This is an information disclosure issue - attackers can map your SaaS footprint.

Impact: Reduces reconnaissance surface and limits attacker knowledge of your infrastructure