DNS Report for feishu.cn

• vip4.alidns.com

  • IPv4: 8.212.93.4, 140.205.1.6, 170.33.80.11, 170.33.73.27, 170.33.32.211, 170.33.40.137
  • IPv6: 2408:4009:500::4
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

• vip3.alidns.com

  • IPv4: 170.33.73.26, 170.33.80.10, 140.205.1.5, 8.212.93.3, 170.33.32.210, 170.33.40.136
  • IPv6: 2408:4009:500::3
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

Nameserver Count - OK

• vip4.alidns.com

  • Status: Responded
  • IP(s): 220.243.190.122, 122.14.236.76
  • TTL: 600 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

• vip3.alidns.com

  • Status: Responded
  • IP(s): 220.243.190.122, 122.14.236.76
  • TTL: 600 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

vip4.alidns.com

• Serial: 2024072312
• Refresh: 3600
• Retry: 1200
• Expire: 86400
• Minimum TTL: 600

vip3.alidns.com

• Serial: 2024072312
• Refresh: 3600
• Retry: 1200
• Expire: 86400
• Minimum TTL: 600

Serial: 2024072312 - OK

REFRESH: 3600 - OK

RETRY: 1200 - OK

EXPIRE: 86400 - OK

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

vip4.alidns.com

• 10 mx1.feishu.cn ( 54.221.254.138 )
• 20 mx2.feishu.cn ( 220.243.190.1 )
• 30 mx3.feishu.cn ( 122.14.229.0 )

vip3.alidns.com

• 10 mx1.feishu.cn ( 54.221.254.138 )
• 20 mx2.feishu.cn ( 220.243.190.1 )
• 30 mx3.feishu.cn ( 52.220.106.220 )

MX Record Consistency - Warning: Inconsistencies found

MX Record Count - OK

• 220.106.220.52.in-addr.arpa -> ec2-52-220-106-220.ap-southeast-1.compute.amazonaws.com
• 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:spf.protection.partner.outlook.cn include:_netblocks.m.feishu.cn include:spf2.bytedance.com -all
• SPF Syntax: Passed
• Deprecated Elements: Passed
• IP Addresses:
• Includes: spf.protection.partner.outlook.cn, _netblocks.m.feishu.cn, spf2.bytedance.com
• DNS Lookups: 6
• Void Lookups: Passed
• Escaping Chars: Not Present
• All Mechanism: -all

• DKIM Records Found: Yes
• Selectors Found: s1
• Selector 's1':
  Record: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA03exLvhPqyB8qoYUZMCncKczQYUK4YCcfu71aW612AYJpGtuJoVH8w/KjKPDU9FEM4V8NIt/9tOqygMyZMEEb29JAUyz82qWyyXAQU4xOyoTtmUqRkkf+ONcalTOItPkwtJLFuEfkjqhi7LC1heid0sEAuDqR4/ZpKezQK9rMCsWDGwsxqbZOwUW1j1Ou6FH5
• Valid Syntax: Yes

• 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:

• No DMARC record found