DNS Report for cesnet.cz

• nsa.ces.net

  • IPv4: 195.113.144.205
  • IPv6: 2001:718:1:1::144:205
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

• nsa.ten.cz

  • IPv4: 81.95.101.67
  • IPv6: 2a02:4a8:ac24:115::101:67
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

• nsa.cesnet.cz

  • IPv4: 195.113.144.228
  • IPv6: 2001:718:1:101::144:228
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

• decsys.vsb.cz

  • IPv4: 158.196.149.9
  • IPv6: 2001:718:1001:149::9
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

Nameserver Count - OK

• nsa.ces.net

  • Status: Responded
  • IP(s): 78.128.246.93
  • TTL: 3600 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

• nsa.ten.cz

  • Status: Responded
  • IP(s): 78.128.246.93
  • TTL: 3600 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

• nsa.cesnet.cz

  • Status: Responded
  • IP(s): 78.128.246.93
  • TTL: 3600 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

• decsys.vsb.cz

  • Status: Responded
  • IP(s): 78.128.246.93
  • TTL: 3600 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

nsa.ces.net

• Serial: 2020014303
• Refresh: 28800
• Retry: 7200
• Expire: 1814400
• Minimum TTL: 900

nsa.ten.cz

• Serial: 2020014303
• Refresh: 28800
• Retry: 7200
• Expire: 1814400
• Minimum TTL: 900

nsa.cesnet.cz

• Serial: 2020014303
• Refresh: 28800
• Retry: 7200
• Expire: 1814400
• Minimum TTL: 900

decsys.vsb.cz

• Serial: 2020014303
• Refresh: 28800
• Retry: 7200
• Expire: 1814400
• Minimum TTL: 900

Serial: 2020014303 - OK

REFRESH: 28800 - OK

RETRY: 7200 - OK

EXPIRE: 1814400 - OK

MINIMUM TTL: 900 - Note: Outside recommended range (1-3 hours)

nsa.ces.net

• 10 cartero.cesnet.cz ( 78.128.216.16 )
• 10 postino.cesnet.cz ( 195.113.144.242 )
• 100 mail.cesnet.cz ( 195.113.144.234 )

nsa.ten.cz

• 10 cartero.cesnet.cz ( 78.128.216.16 )
• 10 postino.cesnet.cz ( 195.113.144.242 )
• 100 mail.cesnet.cz ( 195.113.144.234 )

nsa.cesnet.cz

• 10 cartero.cesnet.cz ( 78.128.216.16 )
• 10 postino.cesnet.cz ( 195.113.144.242 )
• 100 mail.cesnet.cz ( 195.113.144.234 )

decsys.vsb.cz

• 10 cartero.cesnet.cz ( 78.128.216.16 )
• 10 postino.cesnet.cz ( 195.113.144.242 )
• 100 mail.cesnet.cz ( 195.113.144.234 )

MX Record Consistency - OK

MX Record Count - OK

• 234.144.113.195.in-addr.arpa -> mail.cesnet.cz
• 242.144.113.195.in-addr.arpa -> postino.cesnet.cz
• 16.216.128.78.in-addr.arpa -> cartero.cesnet.cz

PTR Records - OK

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

DNSSEC - OK

SPF Record Published: Passed

Multiple SPF Records: Passed

SPF Record 1:

• Record: v=spf1 exists:%{ir}.spf.cesnet.cz include:servers.mcsv.net ~all
• SPF Syntax: Failed
• Deprecated Elements: Passed
• IP Addresses:
• Includes: servers.mcsv.net
• DNS Lookups: 3
• Void Lookups: Passed
• Escaping Chars: Not Present
• All Mechanism: ~all

Errors:

• SPF record syntax is invalid

• DKIM Records Found: No

Warnings:

• No DKIM records found for common selectors

• Record: v=DMARC1; p=quarantine; sp=none; rua=mailto:[email protected]
• Syntax: Valid
• Policy: quarantine
• Subdomain Policy: none
• RUA (Aggregate Reports): mailto:[email protected]

DMARC External Validation:

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