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DNS Report for sina.cn

Date Generated: 2024-08-08 22:23:48
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Nameservers

  • ns1.sina.com.cn
    • IPv4: 221.179.193.14
    • IPv6: No IPv6 found
    • TTL (IPv4): 30 seconds
    • TTL (IPv6): N/A seconds
    • Recursive: N/A
  • ns2.sina.com.cn
    • IPv4: 180.149.138.199
    • IPv6: No IPv6 found
    • TTL (IPv4): 30 seconds
    • TTL (IPv6): N/A seconds
    • Recursive: N/A
  • ns3.sina.com.cn
    • IPv4: 123.125.29.99
    • IPv6: No IPv6 found
    • TTL (IPv4): 30 seconds
    • TTL (IPv6): N/A seconds
    • Recursive: N/A

Nameserver Count - OK

Nameserver Queries

  • ns1.sina.com.cn
    • Status: Responded
    • IP(s): 36.51.254.90
    • TTL: 60 seconds
    • Recursive Queries: Does not allow recursive queries
    • TCP Connectivity: TCP connection failed (Response code: REFUSED)
  • ns2.sina.com.cn
    • Status: Responded
    • IP(s): 36.51.254.90
    • TTL: 60 seconds
    • Recursive Queries: Does not allow recursive queries
    • TCP Connectivity: TCP connection failed (Response code: REFUSED)
  • ns3.sina.com.cn
    • Status: Responded
    • IP(s): 36.51.254.90
    • TTL: 60 seconds
    • Recursive Queries: Does not allow recursive queries
    • TCP Connectivity: TCP connection failed (Response code: REFUSED)

SOA Records

ns1.sina.com.cn
  • Serial: 1
  • Refresh: 1800
  • Retry: 600
  • Expire: 604800
  • Minimum TTL: 600
ns2.sina.com.cn
  • Serial: 1
  • Refresh: 1800
  • Retry: 600
  • Expire: 604800
  • Minimum TTL: 600
ns3.sina.com.cn
  • Serial: 1
  • Refresh: 1800
  • Retry: 600
  • Expire: 604800
  • Minimum TTL: 600

Serial: 1 - OK

REFRESH: 1800 - OK

RETRY: 600 - OK

EXPIRE: 604800 - OK

MINIMUM TTL: 600 - Note: Outside recommended range (1-3 hours)

MX Records

ns1.sina.com.cn
ns2.sina.com.cn
ns3.sina.com.cn

MX Record Consistency - OK

MX Record Count - OK

Reverse MX A records (PTR)

  • 192.45.126.123.in-addr.arpa -> No PTR record found: The DNS query name does not exist: 192.45.126.123.in-addr.arpa.
  • 189.36.7.49.in-addr.arpa -> No PTR record found: The DNS query name does not exist: 189.36.7.49.in-addr.arpa.
  • 189.36.7.49.in-addr.arpa -> No PTR record found: The DNS query name does not exist: 189.36.7.49.in-addr.arpa.

PTR Records - OK

DNSSEC

DNSSEC Inspector
  • Signed: No
  • Validation: Failed
  • DNSKEY Records: None
  • DS Records in parent zone: None
  • DS at Parent: None

DNSSEC - Note: Domain is not signed with DNSSEC

Error: No DNSSEC records found

SPF (Sender Policy Framework)

SPF Record Published: Passed

Multiple SPF Records: Passed

SPF Record 1:
  • Record: v=spf1 include:spf.sinamail.sina.com.cn -all
  • SPF Syntax: Passed
  • Deprecated Elements: Passed
  • IP Addresses:
  • Includes: spf.sinamail.sina.com.cn
  • DNS Lookups: 5
  • Void Lookups: Passed
  • Escaping Chars: Not Present
  • All Mechanism: -all

DKIM (DomainKeys Identified Mail)

  • DKIM Records Found: No
Warnings:
  • No DKIM records found for common selectors

DMARC

  • Record: None
  • Syntax: Invalid
  • Policy: None
  • RUA (Aggregate Reports):
DMARC External Validation:
  • All external domains in your DMARC record are giving permission to send them DMARC reports.
Errors:
  • DMARC record does not exist
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