Domain report: selenic.com

Registration

info

.com generic · Tucows Domains Inc. · expires 2027-02-21

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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 2027-02-21 #3

The registration is valid until 2027-02-21 (121 days).
✓ Transfer locked #4

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

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

fail

ns.waste.org, urth.org

Nameserver	Addresses	Network (AS)	Glue
ns.waste.org	172.104.6.113	AS63949 AKAMAI-LINODE-AP - Akamai Connected Cloud, SG	-
urth.org	(does not resolve)		-

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2 nameservers

Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns.waste.org, urth.org.

#6
✓ Parent and zone agree #7

The parent delegation and the zone's NS records list the same nameservers.
✓ No glue needed #8

All nameservers are outside the zone, so no glue records are needed.
✗

Nameserver names don't resolve

These nameservers have no A or AAAA record, so they can't be reached (lame delegation): urth.org.

#9
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All nameservers in one AS

All nameserver addresses are announced by one network operator (AS63949 (AKAMAI-LINODE-AP - Akamai Connected Cloud, SG): 1 address). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.

#11
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All nameserver names under .org

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
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Partly IPv6

These nameservers have no IPv6 address: ns.waste.org.

#13

fail

1 of 1 addresses answer authoritatively

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
ns.waste.org 172.104.6.113	NOERROR, 91 ms, authoritative	no	yes / yes	ALLOWED (9 records)	9.11.5-P4-5.1+deb10u11-Debian

✓ All respond #14

All 1 nameserver address 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: ns.waste.org: "9.11.5-P4-5.1+deb10u11-Debian". 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: ns.waste.org (172.104.6.113): 9 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.

warn

serial 2019083101 · primary selenic.com

✓ Serial 2019083101 everywhere #22

All nameservers serve the same version of the zone.
!

Unusual SOA timers

retry 1h should be shorter than refresh 1h. Current values: refresh 1h, retry 1h, expire 1000h, negative TTL 1h.

#23
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Hidden master

The primary nameserver selenic.com is not listed as a nameserver: a hidden master that only feeds the public secondaries. That is a common setup; make sure it is not reachable for zone transfers from outside.

#24
✓ Contact hostmaster@selenic.com #25

The SOA RNAME hostmaster.selenic.com means hostmaster@selenic.com.
✓ Date-based serial #26

The serial 2019083101 follows the YYYYMMDDnn convention (2019-08-31).

warn

Not signed

info

6 records at the apex

Type	Value	TTL
SOA	selenic.com. hostmaster.selenic.com. 2019083101 3600 3600 3600000 3600	259200
NS	ns.waste.org.	1500
NS	urth.org.	1500
A	172.104.6.113	1500
MX	20 waste.org.	1500
TXT	"v=spf1 mx a ~all"	1500

✓ TTLs within range #32

TTLs: A 25m, MX 25m, NS 25m. The NS TTL at the parent is 2d and in the zone 25m; 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.
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No CAA records

Without CAA records any certificate authority may issue certificates for this domain. A CAA record limits issuance to the CAs you use.

#35