DNS Report for baidu.cn

• ns2.baidu.com

  • IPv4: 220.181.33.31
  • IPv6: No IPv6 found
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): N/A seconds
  • Recursive: N/A

• ns1.baidu.com

  • IPv4: 110.242.68.134
  • IPv6: No IPv6 found
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): N/A seconds
  • Recursive: N/A

• ns4.baidu.com

  • IPv4: 14.215.178.80, 111.45.3.226
  • IPv6: No IPv6 found
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): N/A seconds
  • Recursive: N/A

• ns3.baidu.com

  • IPv4: 153.3.238.93, 36.155.132.78
  • IPv6: No IPv6 found
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): N/A seconds
  • Recursive: N/A

Nameserver Count - OK

• ns2.baidu.com

  • Status: Responded
  • IP(s): 220.181.38.251, 39.156.66.10, 220.181.38.148
  • TTL: 120 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

• ns1.baidu.com

  • Status: Responded
  • IP(s): 220.181.38.148, 220.181.38.251, 39.156.66.10
  • TTL: 120 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

• ns4.baidu.com

  • Status: Responded
  • IP(s): 220.181.38.148, 220.181.38.251, 39.156.66.10
  • TTL: 120 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

• ns3.baidu.com

  • Status: Responded
  • IP(s): 220.181.38.251, 39.156.66.10, 220.181.38.148
  • TTL: 120 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

ns2.baidu.com

• Serial: 2012082779
• Refresh: 300
• Retry: 300
• Expire: 2592000
• Minimum TTL: 120

ns1.baidu.com

• Serial: 2012082779
• Refresh: 300
• Retry: 300
• Expire: 2592000
• Minimum TTL: 120

ns4.baidu.com

• Serial: 2012082779
• Refresh: 300
• Retry: 300
• Expire: 2592000
• Minimum TTL: 120

ns3.baidu.com

• Serial: 2012082779
• Refresh: 300
• Retry: 300
• Expire: 2592000
• Minimum TTL: 120

Serial: 2012082779 - OK

REFRESH: 300 - OK

RETRY: 300 - OK

EXPIRE: 2592000 - OK

MINIMUM TTL: 120 - Note: Outside recommended range (1-3 hours)

ns2.baidu.com

• 10 mx.maillb.baidu.com ( 12.0.243.41 )
• 15 mx.n.shifen.com ( 12.0.243.41 )

ns1.baidu.com

• 10 mx.maillb.baidu.com ( 12.0.243.41 )
• 15 mx.n.shifen.com ( 12.0.243.41 )

ns4.baidu.com

• 10 mx.maillb.baidu.com ( 12.0.243.41 )
• 15 mx.n.shifen.com ( 12.0.243.41 )

ns3.baidu.com

• 10 mx.maillb.baidu.com ( 12.0.243.41 )
• 15 mx.n.shifen.com ( 12.0.243.41 )

MX Record Consistency - OK

MX Record Count - OK

• 41.243.0.12.in-addr.arpa -> usmx01.baidu.com
• 41.243.0.12.in-addr.arpa -> usmx01.baidu.com

PTR Records - OK

• 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 Record Published: Failed

Multiple SPF Records: Passed

Errors:

• No SPF record found

• DKIM Records Found: No

Warnings:

• No DKIM records found for common selectors

• 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