openwall.com

Checked 22 October 2026, 10:10 UTC · via 8.8.8.8
✗Problems found
23 passed 1 warning 1 failed 6 info

Registration

info

.com generic · Gandi SAS · expires 2027-06-23

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Gandi SAS
Registered
23 June 1999
Last changed
10 June 2026
Expires
23 June 2027
Status
client transfer prohibited
Registry nameservers
ns1.openwall.net, ns6.gandi.net
RDAP server
https://rdap.verisign.com/com/v1/

Checks

  • i
    .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 2027-06-23 #3
    The registration is valid until 2027-06-23 (244 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.

Delegation

info

ns1.openwall.net, ns6.gandi.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns1.openwall.net, ns6.gandi.net
NS in the zone
ns1.openwall.net, ns6.gandi.net
NameserverAddressesNetwork (AS)Glue
ns1.openwall.net193.110.157.125AS60131 HIGH5-NL - High5! B.V., NL-
ns6.gandi.net217.70.177.42 2001:4b98:d:1::4bAS29169 GANDI-AS - GANDI SAS, FR AS29169 GANDI-AS - GANDI SAS, FR-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.openwall.net, ns6.gandi.net.
    #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.
  • ✓ 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 1 IPv6 /48.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS29169 (GANDI-AS - GANDI SAS, FR): 2 addresses; AS60131 (HIGH5-NL - High5! B.V., NL): 1 address.
  • i
    All nameserver names under .net
    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
  • i
    Partly IPv6
    These nameservers have no IPv6 address: ns1.openwall.net.
    #13

Nameservers

fail

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.openwall.net 193.110.157.125NOERROR, 10 ms, authoritativenono / yesrefusedunknown
ns6.gandi.net 217.70.177.42NOERROR, 18 ms, authoritativenoyes / yesrefusedcustom
ns6.gandi.net 2001:4b98:d:1::4bNOERROR, 20 ms, authoritativenoyes / yesrefusedcustom

Checks

  • ✓ All respond #14
    All 3 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.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: ns1.openwall.net: "unknown"; ns6.gandi.net: "custom".
    #17
  • ✓ Zone transfers refused #18
    No nameserver allows a zone transfer to the public.
  • ✗
    No DNS over TCP
    DNS over TCP is required (RFC 7766); without it, large answers such as DNSSEC responses fail. Not answering over TCP: ns1.openwall.net (193.110.157.125): dial tcp 193.110.157.125:53: connect: connection refused.
    #19
  • ✓ EDNS supported #20
    All nameservers support EDNS(0).
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

pass

serial 2025061100 · primary ns1.openwall.net

Found

Primary (MNAME)
ns1.openwall.net
Contact (RNAME)
dnsadmin.openwall.net
Serial
2025061100
Refresh / retry
14400 s / 3600 s
Expire
604800 s
Negative TTL
28800 s

Serial per nameserver

NameserverSerial
ns1.openwall.net (193.110.157.125)2025061100
ns6.gandi.net (217.70.177.42)2025061100
ns6.gandi.net (2001:4b98:d:1::4b)2025061100

Checks

  • ✓ Serial 2025061100 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 4h, retry 1h, expire 7d, negative TTL 8h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.openwall.net is one of the listed nameservers.
  • ✓ Contact dnsadmin@openwall.net #25
    The SOA RNAME dnsadmin.openwall.net means dnsadmin@openwall.net.
  • ✓ Date-based serial #26
    The serial 2025061100 follows the YYYYMMDDnn convention (2025-06-11).

DNSSEC

warn

Not signed

Found

Validated by resolver
no

Checks

  • !
    Not signed
    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

Records

info

6 records at the apex

Found

Read from
193.110.157.125:53
TypeValueTTL
SOAns1.openwall.net. dnsadmin.openwall.net. 2025061100 14400 3600 604800 288003600
NSns1.openwall.net.3600
NSns6.gandi.net.3600
A193.110.157.2423600
MX10 mail.openwall.com.3600
TXT"v=spf1 ip4:193.110.157.0/24 -all"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, MX 1h, 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.
  • i
    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