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84
Total
80
DNS
100
Email
77
Security
50
Network
100
Availability
Domaintails.net
IPv41
IPv60
MX records1
StatusActive
Domain technical report

Tails - Home

tails.net

Generated: 2026-08-10T11:17:39-05:00 · Cached result

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IPv41
IPv60
MX1
NS2

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

1 IPv4 address(es) detected.

!
IPv6 (AAAA)0 / 10 pts · Dns

0 IPv6 address(es) detected.

✓
Name server redundancy20 / 20 pts · Dns

2 NS record(s); 2 or more required.

✓
SOA record10 / 10 pts · Dns

Authoritative zone record.

✓
DNSSEC chain15 / 15 pts · Dns

DS and DNSKEY detected.

✓
CAA policy5 / 5 pts · Dns

Certificate authority restriction.

!
DNS propagation0 / 10 pts · Dns

Agreement between public resolvers.

✓
MX records20 / 20 pts · Mail

1 MX record(s).

✓
SPF25 / 25 pts · Mail

SPF policy published.

✓
DMARC25 / 25 pts · Mail

DMARC policy published.

✓
DKIM20 / 20 pts · Mail

A DKIM selector was verified.

✓
MTA-STS5 / 5 pts · Mail

Mail transport policy.

✓
TLS-RPT5 / 5 pts · Mail

TLS reporting policy.

✓
Valid TLS certificate55 / 55 pts · Security

77 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers12 / 35 pts · Security

3 of 9 evaluated headers detected.

✓
PTR reverse DNS30 / 30 pts · Network

PTR: lizard.tails.net

i
IPv4 diversity20 / 35 pts · Network

Two or more IPv4 addresses receive full points.

!
IPv6 connectivity0 / 35 pts · Network

AAAA availability.

✓
DNS resolution40 / 40 pts · Availability

At least one address family must resolve.

✓
HTTP response40 / 40 pts · Availability

HTTP/1.1 200 OK

✓
HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

1 record(s)
204.13.164.63

AAAA

0 record(s)
—

Not configured

CNAME

0 record(s)
—

Not configured

MX

1 record(s)
10 mta.tails.net.

TXT

2 record(s)
"v=spf1 a mx ip4:216.66.23.43 -all"
"google-site-verification=AcMH6Or6DvT9OHS19qYjcSIPTHv8jB1Z6lbOWpOAl7U"

NS

2 record(s)
ns1.tails.net.
ns2.tails.net.

SOA

1 record(s)
ns1.tails.net. sysadmins.tails.net. 2026012705 10800 3600 1209600 3600

CAA

9 record(s)
128 issue "letsencrypt.org;accounturi=https://acme-v02.api.letsencrypt.org/acme/acct/3602348081"
128 issue "letsencrypt.org;accounturi=https://acme-v02.api.letsencrypt.org/acme/acct/1357651026"
128 issue "letsencrypt.org;accounturi=https://acme-v02.api.letsencrypt.org/acme/acct/1693187057"
128 issue "letsencrypt.org;accounturi=https://acme-v02.api.letsencrypt.org/acme/acct/1259382666"
128 issue "letsencrypt.org;accounturi=https://acme-v02.api.letsencrypt.org/acme/acct/5189306"
128 issue "letsencrypt.org;accounturi=https://acme-v02.api.letsencrypt.org/acme/acct/5194671"
128 issue "letsencrypt.org;accounturi=https://acme-v02.api.letsencrypt.org/acme/acct/2939509766"
128 issue "letsencrypt.org;accounturi=https://acme-v02.api.letsencrypt.org/acme/acct/1554891957"
128 issue "letsencrypt.org;accounturi=https://acme-v02.api.letsencrypt.org/acme/acct/2984823086"

DS

1 record(s)
46768 13 2 25FB8A8E636AAF16FC3DA872DD64597BA57B67DB430A4DB6B53A4150 EBB4EB0A

DNSKEY

1 record(s)
257 3 13 GjgOqygBvTZqUlDJpytFzLRXKhwCwHFZ0t3GpsNzYffSBwmmaHkofPCN vT6dlWxWuKnWuCv1KGynfCZP/j8Wyw==

RRSIG

5 record(s)
DNSKEY 13 2 3600 20260820000000 20260730000000 46768 tails.net. tUg25SRG1RhJ+TCTRl4Z0XWJOGuCQF16lNuGYgg1a6Zuq1HTfiOUJdrG 9hWBkwY1g0z9otaYMjnugO6FhDnz1Q==
NS 13 2 3600 20260820000000 20260730000000 46768 tails.net. NkZPSMXahu++LpwLtxVOC4k1mq38wt30NS0nAuiGKgSsUBVdmGYrdM5k sf7w7YwVs9RDTW6T+uy+oX2Vh4kDeg==
MX 13 2 3600 20260820000000 20260730000000 46768 tails.net. yvCiIs9uARgX1E0tja8c5J5getUrPNyib3nKDXyIqQWEMD4k/gxkosyM M+PEKS+FIHvENNRcZ5vRTGjlRWAbxw==
A 13 2 150 20260820000000 20260730000000 46768 tails.net. oyTbLGtG+ElOt3kickq93xDryOB/pM7B9WNAfiDlEgDHE3wqCwelYRdo M3vmUOEkImG9PHJgPoZTVKgdNjYyUg==
DS 13 2 86400 20260815033846 20260808022846 7272 net. ZglnRcQtvnYsoO+VeztsT4oHHHS+h6ppKwqzXnZV68BczPSakRXI9Mzs H0c5am1w2Z9RGvTCZ4yziQlooRLbvA==

NSEC

1 record(s)
_dmarc.tails.net. A NS SOA MX TXT RRSIG NSEC DNSKEY CAA

NSEC3

0 record(s)
—

Not configured

SRV

0 record(s)
—

Not configured

NAPTR

0 record(s)
—

Not configured

TLSA

0 record(s)
—

Not configured

SSHFP

0 record(s)
—

Not configured

SPF

Configured
v=spf1 a mx ip4:216.66.23.43 -all

DMARC

Configured
v=DMARC1; p=quarantine; rua=mailto:dmarc@tails.net; ruf=mailto:dmarc@tails.net;

DKIM

Selector dkim
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDFgYpT+hfZANtArFoOPV6lrLBcr42pDwsaYj6RRn1w2wibWwEOTlk2nQ786KPxWeHtlUcX/d9ig3wSpBTk+SkXHFkFyAqqE//yyXjb5kpTcg5i7xfelo7RB2CmBA3qBWmgaqTefXtTxmHA77pnIRGK5YiWv9p6Ixp4O17VVhZ+xwIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
Tails - Home
Description
Final URL
https://tails.net/
HTTP status
200

HTTP

Status
HTTP/1.1 200 OK
Final URL
https://tails.net/
Version
2
Server
nginx/1.26.3
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Let's Encrypt
CN
tails.net
Valid from
2026-07-28T12:40:37-05:00
Valid until
2026-10-26T12:40:36-05:00
Days remaining
77
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

Security headers

3 active
✓
HSTSImplemented
—
Content Security PolicyNot detected
✓
X-Content-Type-OptionsImplemented
✓
X-Frame-OptionsImplemented
—
Referrer PolicyNot detected
—
Permissions PolicyNot detected
—
Cross-Origin-Opener-PolicyNot detected
—
Cross-Origin-Embedder-PolicyNot detected
—
Cross-Origin-Resource-PolicyNot detected

DNS propagationComparison across public resolvers

Public resolver comparison

Review
!
Differences detected

5 public resolvers queried.

ResolverServerResultLatency
Google
8.8.8.8
204.13.164.63
169,61 ms
Cloudflare
1.1.1.1
204.13.164.63
100,32 ms
Quad9
9.9.9.9
94.142.244.34
210,18 ms
OpenDNS
208.67.222.222
204.13.164.63
238,08 ms
AdGuard
94.140.14.14
94.142.244.34
68,29 ms

IP, geolocation and ASNAssociated network information

204.13.164.63

No data
success
No
country
region
city
asn
organization
isp

Visitor information

Visitor
ip
216.73.217.62
reverse
country
country_code
region
city
latitude
longitude
isp
organization
asn
timezone
browser
Other
os
Other
language
user_agent
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
is_bot
Yes
cloudflare
No

SMTPEmail port connectivity

mta.tails.net

Port 25: Closed/unreachable - 55.7 ms - 
Port 465: Closed/unreachable - 4071.6 ms - 
Port 587: Closed/unreachable - 151.9 ms - 220 mta.tails.net ESMTP Postfix (Debian/GNU)

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