Domain report: webmin.com

Registration

info

.com generic · Network Solutions, LLC · expires 2027-09-04

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.com is a generic TLD (gTLD)

Generic TLD under an ICANN registry agreement: ICANN-accredited registrars, UDRP and RDAP apply.

#1
✓ TLD delegated and signed #2

.com is delegated in the root zone and DNSSEC-signed.
✓ Expires on 2027-09-04 #3

The registration is valid until 2027-09-04 (316 days).
✓ Transfer locked #4

Registry status: client transfer prohibited.
✓ Registry and delegation match #5

The nameservers registered at the registry are the ones published in DNS.

warn

vultr.webmin.com, webmail.webmin.com

Nameserver	Addresses	Network (AS)	Glue
vultr.webmin.com	45.76.69.64	AS20473 AS-VULTR - The Constant Company, LLC, US	45.76.69.64
webmail.webmin.com	44.217.106.106	AS14618 AMAZON-AES - Amazon.com, Inc., US	44.217.106.106

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2 nameservers

Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: vultr.webmin.com, webmail.webmin.com.

#6
✓ Parent and zone agree #7

The parent delegation and the zone's NS records list the same nameservers.
✓ Glue present and correct #8

Glue is published for the nameservers inside the zone: vultr.webmin.com, webmail.webmin.com.
✓ All names resolve #9

Every nameserver name has an address and is not an alias.
✓ Nameservers in different networks #10

The nameservers are spread over 2 IPv4 /24s and 0 IPv6 /48s.
✓ 2 autonomous systems #11

The nameservers are spread over: AS14618 (AMAZON-AES - Amazon.com, Inc., US): 1 address; AS20473 (AS-VULTR - The Constant Company, LLC, US): 1 address.
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All nameserver names under .com

All nameserver names are under one TLD, so a problem with that TLD also makes the nameservers unreachable. Some operators use names under two TLDs for extra resilience.

#12
!

No IPv6

None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.

#13

fail

2 of 2 addresses answer authoritatively

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
vultr.webmin.com 45.76.69.64	NOERROR, 153 ms, authoritative	no	yes / yes	ALLOWED (564 records)	9.11.36-RedHat-9.11.36-16.el8_10.7
webmail.webmin.com 44.217.106.106	NOERROR, 98 ms, authoritative	no	yes / yes	refused	9.8.2rc1-RedHat-9.8.2-0.68.rc1.el6_10.8

✓ All respond #14

All 2 nameserver addresses answered.
✓ All authoritative #15

Every responding nameserver answers authoritatively for the zone.
✓ No recursion #16

The nameservers do not answer recursive queries for other domains.
!

Software version disclosed

These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: vultr.webmin.com: "9.11.36-RedHat-9.11.36-16.el8_10.7"; webmail.webmin.com: "9.8.2rc1-RedHat-9.8.2-0.68.rc1.el6_10.8". Hide or replace the version string.

#17
✗

Zone transfer allowed

These nameservers send the complete zone to anyone who asks (AXFR), exposing all host names: vultr.webmin.com (45.76.69.64): 564 records. Restrict zone transfers to your secondary servers.

#18
✓ TCP supported #19

All nameservers answer over TCP.
✓ EDNS supported #20

All nameservers support EDNS(0).
✓ Public addresses #21

All nameserver addresses are publicly routable.

info

serial 1656287367 · primary ip-10-67-180-31.ec2.internal

Nameserver	Serial
vultr.webmin.com (45.76.69.64)	1656287367
webmail.webmin.com (44.217.106.106)	1656287367

✓ Serial 1656287367 everywhere #22

All nameservers serve the same version of the zone.
✓ Timers within recommendations #23

SOA refresh 1h, retry 10m, expire 14d, negative TTL 1h.
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Hidden master (not resolvable)

The primary nameserver ip-10-67-180-31.ec2.internal is not listed as a nameserver and does not resolve publicly: a hidden master, or a placeholder name. Some tools (e.g. dynamic updates) use MNAME to find the primary.

#24
✓ Contact root@ip-10-67-180-31.ec2.internal #25

The SOA RNAME root.ip-10-67-180-31.ec2.internal means root@ip-10-67-180-31.ec2.internal.
✓ Timestamp serial #26

The serial 1656287367 is a Unix timestamp (2022-06-26 23:49 UTC).

warn

Signed, but no DS at parent

Key tag	Role	Algorithm
31759	KSK (257)	RSASHA256 (8)
18114	ZSK (256)	RSASHA256 (8)

!

Signed but not delegated securely

The zone is signed but the parent has no DS record, so the signatures are not used. Publish the DS record at your registrar.

#27
✓ Modern algorithms #29

Key algorithms: RSASHA256 (8).
✓ Signatures valid until 2026-11-19 #30

The earliest DNSKEY/SOA signature expires at 2026-11-19 15:53 UTC.
!

NSEC3 with extra iterations or salt

NSEC3 uses 10 iterations and a 0-byte salt. RFC 9276 recommends 0 iterations and no salt: extra iterations cost resolvers CPU and add no real protection, and some validators treat high counts as insecure.

#31

pass

9 records at the apex

Type	Value	TTL
SOA	ip-10-67-180-31.ec2.internal. root.ip-10-67-180-31.ec2.internal. 1656287367 3600 600 1209600 3600	3600
NS	vultr.webmin.com.	3600
NS	webmail.webmin.com.	3600
A	216.105.38.11	600
MX	5 mail.webmin.com.	86400
TXT	"v=spf1 a mx a:mail.webmin.com a:fudu.webmin.com a:www.virtualmin.com a:webmail.webmin.com ip4:144.140.0.0/16 ip4:144.135.0.0/16 ip4:108.60.199.107 ip4:54.167.84.226 ip4:45.76.69.64 ip4:44.217.106.106 include:amazonses.com ~all"	3600
TXT	"google-site-verification=lSVNYsLLeoN-xAwtm6rMLimiNueoYeeTvXTPIHTZHgY "	3600
CAA	0 issue "letsencrypt.org"	3600
CAA	0 issuewild "letsencrypt.org"	3600

✓ TTLs within range #32

TTLs: A 10m, MX 1d, NS 1h. The NS TTL at the parent is 2d and in the zone 1h; resolvers may use either.
✓ No CNAME at the apex #33

The zone apex has no CNAME record.
✓ No wildcard #34

Names that don't exist return NXDOMAIN.
✓ CAA restricts issuance #35

Certificates may be issued by: letsencrypt.org.