DNS Report: duo.com

Generated: 2026-08-10T02:37:32-05:00

81/100

Diagnostics

StatusCheckPointsDetails
OKIPv4 (A)30/304 IPv4 address(es) detected.
ERRORIPv6 (AAAA)0/100 IPv6 address(es) detected.
OKName server redundancy20/204 NS record(s); 2 or more required.
OKSOA record10/10Authoritative zone record.
ERRORDNSSEC chain0/15Both DS and DNSKEY are required.
OKCAA policy5/5Certificate authority restriction.
ERRORDNS propagation0/10Agreement between public resolvers.
OKMX records20/203 MX record(s).
OKSPF25/25SPF policy published.
OKDMARC25/25DMARC policy published.
OKDKIM20/20A DKIM selector was verified.
ERRORMTA-STS0/5Mail transport policy.
ERRORTLS-RPT0/5TLS reporting policy.
OKValid TLS certificate55/55117 day(s) remaining.
OKCertificate lifetime10/10Full points require at least 30 days remaining.
WARNINGHTTP security headers16/354 of 9 evaluated headers detected.
OKPTR reverse DNS30/30PTR: server-3-167-183-25.ord58.r.cloudfront.net
OKIPv4 diversity35/35Two or more IPv4 addresses receive full points.
ERRORIPv6 connectivity0/35AAAA availability.
OKDNS resolution40/40At least one address family must resolve.
OKHTTP response40/40HTTP/2 200
OKHTTPS final URL20/20Final URL uses HTTPS.

DNS Records

TipoValues
A
3.167.183.25
3.167.183.93
3.167.183.23
3.167.183.70
AAAA
CNAME
MX
30 aer-mx-01.cisco.com.
10 alln-mx-01.cisco.com.
20 rcdn-mx-01.cisco.com.
TXT
"identrust_validate=SMpkw2Y899uXgKrzdHnqptIfXiIOyDNlX1foFF1S209M"
"google-site-verification=QSlNcf5REPqDzZZtYQdQ02iTtFdCkF4iGzRgOHWeAfk"
"google-site-verification=gY1gXbTT44Hc2xjnx-TmKdBLXKzpthxWKGhlqJL0EDw"
"google-site-verification=UxTqzaF64RMmCuE_cfz67aerfbJyPW7jSWJaDRf8U4Q"
"apple-domain-verification=0NFHW4xLPA7qMAUl"
"google-site-verification=zagew00MIXPj4NT7NSuvolRYA9BWUFvOvUU9On5SkLs"
"google-site-verification=FyHTkA00weOnJqC50U6D_1Etz0FeTAV36UzX-mR0t7Y"
"google-site-verification=88KLpNEv0nOJ-yRHH3mp3TIvrG4rhNTP3DbODLQeIYg"
"google-site-verification=_6xJQkVWQvhjZ8WH17r2qEjOu0CYifwUq5DqV-aUPIE"
"google-site-verification=F16Zf7RnF8CVcYnsbn6C308KFSeldSRrLiJK1cCgoBQ"
"google-site-verification=uo-yyMBObeQzZDH55aAFLRLyf0IiN20p0GJ0H6N2jQQ"
"workplace-domain-verification=M0nohbh4MpXazNtpfeLQrdlEAbaeQ3"
"v=spf1 ip4:72.35.40.113/28 ip4:66.51.154.240/29 include:_spf.google.com include:_spf.salesforce.com include:mktomail.com include:stspg-customer.com include:_spf.intacct.com include:servers.mcsv.net ~all"
"google-site-verification=WvGzO9Z62GF-06EZawhrguz4lX-3soAJz8l5Zdd0kpc"
"identrust_validate=VOOjXXB2PpF7kC14MiiEHi40phwnkIP1dhJ1AbyZxWKP"
NS
ns-932.awsdns-52.net.
ns-55.awsdns-06.com.
ns-1365.awsdns-42.org.
ns-1733.awsdns-24.co.uk.
SOA
ns-55.awsdns-06.com. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
CAA
0 issue "globalsign.com"
0 issue "identrust.com"
0 issue "amazon.com"
0 issue "amazonaws.com"
0 issue "pki.goog"
0 issue "digicert.com"
0 issue "letsencrypt.org"
0 issue "starfieldtech.com"
0 issue "amazontrust.com"
0 issue "awstrust.com"
DS
DNSKEY
RRSIG
NSEC
NSEC3
SRV
NAPTR
TLSA
SSHFP