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interactivebrokers.com

Checked 2026-10-22 09:21 UTC · first added 2026-10-21
✗Problems found Score 72 of 100

Domain & DNS

fail

23 passed 3 warn 1 failed

Areas

iRegistration !Delegation ✗Nameservers ✓SOA !DNSSEC iRecords

Problems

  • ✗
    No DNS over TCP
    Nameservers · DNS over TCP is required (RFC 7766); without it, large answers such as DNSSEC responses fail. Not answering over TCP: cdns.interactivebrokers.com (63.86.206.51): read tcp 46.225.38.91:58480->63.86.206.51:53: read: connection reset by peer; ndns.interactivebrokers.com (64.190.196.29): dial tcp 64.190.196.29:53: connect: connection refused.
    #19
  • !
    No IPv6
    Delegation · None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13
  • !
    Software version disclosed
    Nameservers · These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: cdns.interactivebrokers.com: "NSD 4.3.8"; ndns.interactivebrokers.com: "NSD 4.3.8". Hide or replace the version string.
    #17
  • !
    Not signed
    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.
    #27

Recent checks

✗

Full report

Domain & DNS report for interactivebrokers.com ›

Mail

warn

26 passed 3 warn 0 failed

Areas

✓SPF ✓DMARC ✓DKIM !DNSSEC !MX !TLS iBIMI

Problems

  • !
    Not enabled
    DNSSEC · DNSSEC is not enabled for this domain. Consider enabling DNSSEC to protect against DNS spoofing attacks.
    #8
  • !
    Hosts without IPv6
    MX · The following MX hosts could not be resolved to IPv6 addresses: mxa-001fa301.gslb.pphosted.com, mxb-001fa301.gslb.pphosted.com
    #11
  • !
    Not configured
    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.
    #32

Recent checks

!

Full report

Mail report for interactivebrokers.com ›