softether-download.com

Checked 22 October 2026, 10:45 UTC · via 8.8.8.8
!Passed with warnings
24 passed 4 warnings 0 failed 3 info

Registration

info

.com generic · Japan Registry Services Co., Ltd. · expires 2027-02-13

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Japan Registry Services Co., Ltd.
Registered
13 February 2013
Last changed
13 February 2026
Expires
13 February 2027
Status
client transfer prohibited
Registry nameservers
nsi.tennoudai.net, nsj.tennoudai.net, nsk.tennoudai.net, nsu.tennoudai.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 2027-02-13 #3
    The registration is valid until 2027-02-13 (113 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

warn

nsi.tennoudai.net, nsj.tennoudai.net, nsk.tennoudai.net, nsu.tennoudai.net

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
nsi.tennoudai.net, nsj.tennoudai.net, nsk.tennoudai.net, nsu.tennoudai.net
NS in the zone
nsi.tennoudai.net, nsj.tennoudai.net, nsk.tennoudai.net, nsu.tennoudai.net
NameserverAddressesNetwork (AS)Glue
nsi.tennoudai.net160.16.152.236AS9370 SAKURA-B - SAKURA Internet Inc., JP-
nsj.tennoudai.net133.242.228.31AS7684 SAKURA-A - SAKURA Internet Inc., JP-
nsk.tennoudai.net54.179.116.66AS16509 AMAZON-02 - Amazon.com, Inc., US-
nsu.tennoudai.net35.82.239.168AS16509 AMAZON-02 - Amazon.com, Inc., US-

Checks

  • ✓ 4 nameservers #6
    Delegated to nsi.tennoudai.net, nsj.tennoudai.net, nsk.tennoudai.net, nsu.tennoudai.net.
  • ✓ 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 4 IPv4 /24s and 0 IPv6 /48s.
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS16509 (AMAZON-02 - Amazon.com, Inc., US): 2 addresses; AS7684 (SAKURA-A - SAKURA Internet Inc., JP): 1 address; AS9370 (SAKURA-B - SAKURA Internet Inc., JP): 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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

warn

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
nsi.tennoudai.net 160.16.152.236NOERROR, 244 ms, authoritativenoyes / yesrefused-
nsj.tennoudai.net 133.242.228.31NOERROR, 263 ms, authoritativenoyes / yesrefused9.16.1-Ubuntu
nsk.tennoudai.net 54.179.116.66NOERROR, 239 ms, authoritativenoyes / yesrefused-
nsu.tennoudai.net 35.82.239.168NOERROR, 172 ms, authoritativenoyes / yesrefused9.16.1-Ubuntu

Checks

  • ✓ All respond #14
    All 4 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: nsj.tennoudai.net: "9.16.1-Ubuntu"; nsu.tennoudai.net: "9.16.1-Ubuntu". Hide or replace the version string.
    #17
  • ✓ Zone transfers refused #18
    No nameserver allows a zone transfer to the public.
  • ✓ 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.

SOA

warn

serial 2021061103 · primary nsj.tennoudai.net

Found

Primary (MNAME)
nsj.tennoudai.net
Contact (RNAME)
hostmaster.sec.softether.co.jp
Serial
2021061103
Refresh / retry
60 s / 60 s
Expire
88473600 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
nsi.tennoudai.net (160.16.152.236)2021061103
nsj.tennoudai.net (133.242.228.31)2021061103
nsk.tennoudai.net (54.179.116.66)2021061103
nsu.tennoudai.net (35.82.239.168)2021061103

Checks

  • ✓ Serial 2021061103 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    refresh 1m is outside 20m–1d; retry 1m should be shorter than refresh 1m. Current values: refresh 1m, retry 1m, expire 1024d, negative TTL 1h.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver nsj.tennoudai.net is one of the listed nameservers.
  • ✓ Contact hostmaster@sec.softether.co.jp #25
    The SOA RNAME hostmaster.sec.softether.co.jp means hostmaster@sec.softether.co.jp.
  • ✓ Date-based serial #26
    The serial 2021061103 follows the YYYYMMDDnn convention (2021-06-11).

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

7 records at the apex

Found

Read from
160.16.152.236:53
TypeValueTTL
SOAnsj.tennoudai.net. hostmaster.sec.softether.co.jp. 2021061103 60 60 88473600 36003600
NSnsj.tennoudai.net.3600
NSnsk.tennoudai.net.3600
NSnsu.tennoudai.net.3600
NSnsi.tennoudai.net.3600
A27.121.46.573600
TXT"v=spf1 redirect=tennoudai.net"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 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