DNS Report for zhangyue.com

• ns4.dnsv5.com

  • IPv4: 1.12.14.19, 183.47.126.155, 18.223.52.147, 170.106.49.118, 1.12.14.16, 49.51.42.231, 112.80.181.106, 35.165.107.227, 1.12.0.16, 1.12.0.19, 3.97.163.50
  • IPv6: 2402:4e00:111:fff::8
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

• ns3.dnsv5.com

  • IPv4: 1.12.0.18, 1.12.14.17, 49.51.43.232, 1.12.0.17, 52.52.126.139, 34.205.234.26, 163.177.5.75, 1.12.14.18, 125.94.59.200, 170.106.49.166
  • IPv6: 2402:4e00:1430:11f9:0:983e:2e22:bb0f
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

Nameserver Count - OK

• ns4.dnsv5.com

  • Status: Responded
  • IP(s): 182.92.116.243
  • TTL: 600 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

• ns3.dnsv5.com

  • Status: Responded
  • IP(s): 182.92.116.243
  • TTL: 600 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

ns4.dnsv5.com

• Serial: 1725429853
• Refresh: 3600
• Retry: 180
• Expire: 1209600
• Minimum TTL: 180

ns3.dnsv5.com

• Serial: 1725429853
• Refresh: 3600
• Retry: 180
• Expire: 1209600
• Minimum TTL: 180

Serial: 1725429853 - OK

REFRESH: 3600 - OK

RETRY: 180 - OK

EXPIRE: 1209600 - OK

MINIMUM TTL: 180 - Note: Outside recommended range (1-3 hours)

ns4.dnsv5.com

• 1 mx1.feishu.cn ( 54.221.254.138 )
• 5 mx2.feishu.cn ( 220.243.190.1 )
• 10 mx3.feishu.cn ( 220.243.190.1 )

ns3.dnsv5.com

• 1 mx1.feishu.cn ( 54.221.254.138 )
• 5 mx2.feishu.cn ( 122.14.229.0 )
• 10 mx3.feishu.cn ( 54.221.254.138 )

MX Record Consistency - Warning: Inconsistencies found

MX Record Count - OK

• 138.254.221.54.in-addr.arpa -> ec2-54-221-254-138.compute-1.amazonaws.com
• 1.190.243.220.in-addr.arpa -> No PTR record found: All nameservers failed to answer the query 1.190.243.220.in-addr.arpa. IN PTR: Server 172.20.0.10 UDP port 53 answered SERVFAIL
• 138.254.221.54.in-addr.arpa -> ec2-54-221-254-138.compute-1.amazonaws.com
• 1.190.243.220.in-addr.arpa -> No PTR record found: All nameservers failed to answer the query 1.190.243.220.in-addr.arpa. IN PTR: Server 172.20.0.10 UDP port 53 answered The DNS operation timed out.; Server 172.20.0.10 UDP port 53 answered SERVFAIL
• 0.229.14.122.in-addr.arpa -> No PTR record found: The DNS query name does not exist: 0.229.14.122.in-addr.arpa.

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: Passed

Multiple SPF Records: Passed

SPF Record 1:

• Record: v=spf1 +include:_netblocks.m.feishu.cn -all
• SPF Syntax: Passed
• Deprecated Elements: Passed
• IP Addresses:
• Includes: _netblocks.m.feishu.cn
• DNS Lookups: 2
• Void Lookups: Passed
• Escaping Chars: Not Present
• All Mechanism: -all

• 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