DNS Report for viettel.vn

• dns2.vietel.com.vn

  • IPv4: 203.113.188.2
  • IPv6: 2402:800:20ff:2222::1
  • TTL (IPv4): 29 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

• dns1.vietel.com.vn

  • IPv4: 203.113.131.1
  • IPv6: 2402:800:20ff:1111::1
  • TTL (IPv4): 30 seconds
  • TTL (IPv6): 30 seconds
  • Recursive: N/A

Nameserver Count - OK

• dns2.vietel.com.vn

  • Status: Responded
  • IP(s): 203.190.171.27, 203.190.171.28
  • TTL: 900 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

• dns1.vietel.com.vn

  • Status: Responded
  • IP(s): 203.190.171.27, 203.190.171.28
  • TTL: 900 seconds
  • Recursive Queries: Does not allow recursive queries
  • TCP Connectivity: TCP connection failed (Response code: REFUSED)

dns2.vietel.com.vn

• Serial: 2024081503
• Refresh: 10800
• Retry: 3600
• Expire: 604800
• Minimum TTL: 86400

dns1.vietel.com.vn

• Serial: 2024081503
• Refresh: 10800
• Retry: 3600
• Expire: 604800
• Minimum TTL: 86400

Serial: 2024081503 - OK

REFRESH: 10800 - OK

RETRY: 3600 - OK

EXPIRE: 604800 - OK

MINIMUM TTL: 86400 - Note: Outside recommended range (1-3 hours)

dns2.vietel.com.vn

• 10 mtasvr01.viettel.vn ( 203.113.188.19 )
• 10 mtasvr02.viettel.vn ( 203.113.188.20 )

dns1.vietel.com.vn

• 10 mtasvr01.viettel.vn ( 203.113.188.19 )
• 10 mtasvr02.viettel.vn ( 203.113.188.20 )

MX Record Consistency - OK

MX Record Count - OK

• 20.188.113.203.in-addr.arpa -> mtasvr02.viettel.vn
• 19.188.113.203.in-addr.arpa -> mtasvr01.viettel.vn

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 a mx a:viettel.vn ip4:203.113.188.0/27 ~all
• SPF Syntax: Failed
• Deprecated Elements: Passed
• IP Addresses: 203.113.188.0/27
• Includes:
• DNS Lookups: 4
• Void Lookups: Passed
• Escaping Chars: Not Present
• All Mechanism: ~all

Errors:

• SPF record syntax is invalid

• DKIM Records Found: Yes
• Selectors Found: default
• Selector 'default':
  Record: v=DKIM1; g=*; k=rsa; p=<MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC+9Hl9P3czdXh7p07MKjvTgGy2FdeY45QURBW+MH+p9kUSuk2krvzHR6I+8HmTow1PaL4kyxTkYH3yw1Z/sbkZ0KfF9oLuVgBEIDEWqqxVa7X6k/IH14d23U4Z0TbR6a/JT6tClulSAK9XamvuY72wklTIfqnVBjeRJTqSS+jiKwIDAQAB>
• Valid Syntax: Yes

• Record: v=DMARC1;p=reject;pct=100;fo=1;rua=mailto:[email protected];ruf=mailto:[email protected]
• Syntax: Valid
• Policy: reject
• Percent: 100%
• RUA (Aggregate Reports): mailto:[email protected]
• RUF (Forensic Reports): mailto:[email protected]
• Failure Options (fo): 1

DMARC External Validation:

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