DNS Report for nic.cz

• a.ns.nic.cz

  • IPv4: 194.0.12.1
  • IPv6: 2001:678:f::1
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

• b.ns.nic.cz

  • IPv4: 194.0.13.1
  • IPv6: 2001:678:10::1
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

• d.ns.nic.cz

  • IPv4: 193.29.206.1
  • IPv6: 2001:678:1::1
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

Nameserver Count - OK

• a.ns.nic.cz

  • Status: Responded
  • IP(s): 217.31.205.50
  • TTL: 1800 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

• b.ns.nic.cz

  • Status: Responded
  • IP(s): 217.31.205.50
  • TTL: 1800 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

• d.ns.nic.cz

  • Status: Responded
  • IP(s): 217.31.205.50
  • TTL: 1800 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

a.ns.nic.cz

• Serial: 1724937954
• Refresh: 14400
• Retry: 3600
• Expire: 1209600
• Minimum TTL: 7200

b.ns.nic.cz

• Serial: 1724937954
• Refresh: 14400
• Retry: 3600
• Expire: 1209600
• Minimum TTL: 7200

d.ns.nic.cz

• Serial: 1724937954
• Refresh: 14400
• Retry: 3600
• Expire: 1209600
• Minimum TTL: 7200

Serial: 1724937954 - OK

REFRESH: 14400 - OK

RETRY: 3600 - OK

EXPIRE: 1209600 - OK

MINIMUM TTL: 7200 - OK

a.ns.nic.cz

• 10 mail.nic.cz ( 217.31.204.67 )
• 20 mx.nic.cz ( 217.31.57.157 )

b.ns.nic.cz

• 10 mail.nic.cz ( 217.31.204.67 )
• 20 mx.nic.cz ( 217.31.57.157 )

d.ns.nic.cz

• 10 mail.nic.cz ( 217.31.204.67 )
• 20 mx.nic.cz ( 217.31.57.157 )

MX Record Consistency - OK

MX Record Count - OK

• 67.204.31.217.in-addr.arpa -> mail.nic.cz
• 157.57.31.217.in-addr.arpa -> mx.nic.cz

PTR Records - OK

• Signed: Yes
• Validation: Failed
• DNSKEY Records: 2
• DS Records in parent zone: 0
• DS at Parent: None

DNSSEC - Warning: Validation failed

Issue: No DS record found at the parent zone.

Action: Please add the DS record to both your DNS server and domain registrar.

Error: Error checking DNSSEC: Your connection limit exceeded. Please slow down and try again later.

SPF Record Published: Passed

Multiple SPF Records: Passed

SPF Record 1:

• Record: v=spf1 include:_v4nets.nic.cz include:_v6nets.nic.cz include:_spf.network.cz ~all
• SPF Syntax: Passed
• Deprecated Elements: Passed
• IP Addresses:
• Includes: _v4nets.nic.cz, _v6nets.nic.cz, _spf.network.cz
• DNS Lookups: 4
• Void Lookups: Passed
• Escaping Chars: Not Present
• All Mechanism: ~all

• DKIM Records Found: Yes
• Selectors Found: default
• Selector 'default':
  Record: v=DKIM1; g=*; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDJYt4yBtPHr8Sc9ife0imtyWQbL04CuBs+x63ncoJKzeZnq4dYHVMAZCuAgc2l7b7PTfHWtfIzFehQwY5eX6HcwLXyL/3O1YXHLXFyLCTTKgFn/b4Osn6dHJ9ph3N+i7VZjE+ku1hfQ33m1/8dL9CQ9/EqMnGn3CZckJddXUkcpwIDAQAB
• Valid Syntax: Yes

• Record: v=DMARC1; p=reject; pct=100; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1; aspf=r; adkim=s; rf=afrf; ri=86400; sp=reject
• Syntax: Valid
• Policy: reject
• Subdomain Policy: reject
• Percent: 100%
• RUA (Aggregate Reports): mailto:[email protected]
• RUF (Forensic Reports): mailto:[email protected]
• Failure Options (fo): 1
• DKIM Alignment (adkim): Strict
• SPF Alignment (aspf): Relaxed
• Reporting Interval: 86400 seconds

DMARC External Validation:

• All external domains in your DMARC record are giving permission to send them DMARC reports.