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DNS response notes

DNS response notes: 125 practical troubleshooting notes with commands, output examples, diagnostic branches, and related errors.

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DNS

Subdomain does not open after adding a CNAME

A practical cause and fix order for CNAME errors while operating Cloudflare DNS.

mediumCloudflare DNS5 min read
 DNS

DNS NS fix note

An operator checklist for narrowing down NS errors in DNS and preventing recurrence.

highDNS4 min read
 DNS

Google Search Console TXT fix note

An operator checklist for narrowing down TXT errors in Google Search Console and preventing recurrence.

highGoogle Search Console4 min read
 DNS

DNS SERVFAIL fix note

An operator checklist for narrowing down SERVFAIL errors in DNS and preventing recurrence.

highDNS4 min read
 DNS

DNS NS fix note 2

An operator checklist for narrowing down NS errors in DNS and preventing recurrence.

lowDNS5 min read
 DNS

Google Search Console TXT fix note 2

An operator checklist for narrowing down TXT errors in Google Search Console and preventing recurrence.

lowGoogle Search Console5 min read
 DNS

DNS SERVFAIL fix note 2

An operator checklist for narrowing down SERVFAIL errors in DNS and preventing recurrence.

lowDNS5 min read
 DNS

DNS NS fix note 3

An operator checklist for narrowing down NS errors in DNS and preventing recurrence.

mediumDNS6 min read
 DNS

Google Search Console TXT fix note 3

An operator checklist for narrowing down TXT errors in Google Search Console and preventing recurrence.

mediumGoogle Search Console6 min read
 DNS

DNS SERVFAIL fix note 3

An operator checklist for narrowing down SERVFAIL errors in DNS and preventing recurrence.

mediumDNS6 min read
 DNS

DNS NS fix note 4

An operator checklist for narrowing down NS errors in DNS and preventing recurrence.

lowDNS4 min read
 DNS

Google Search Console TXT fix note 4

An operator checklist for narrowing down TXT errors in Google Search Console and preventing recurrence.

lowGoogle Search Console4 min read
 DNS

DNS SERVFAIL fix note 4

An operator checklist for narrowing down SERVFAIL errors in DNS and preventing recurrence.

lowDNS4 min read
 DNS

DNS NS fix note 5

An operator checklist for narrowing down NS errors in DNS and preventing recurrence.

mediumDNS5 min read
 DNS

Google Search Console TXT fix note 5

An operator checklist for narrowing down TXT errors in Google Search Console and preventing recurrence.

mediumGoogle Search Console5 min read
 DNS

DNS SERVFAIL fix note 5

An operator checklist for narrowing down SERVFAIL errors in DNS and preventing recurrence.

mediumDNS5 min read
 DNS

DNS NS fix note 6

An operator checklist for narrowing down NS errors in DNS and preventing recurrence.

highDNS6 min read
 DNS

Google Search Console TXT fix note 6

An operator checklist for narrowing down TXT errors in Google Search Console and preventing recurrence.

highGoogle Search Console6 min read
 DNS

DNS SERVFAIL fix note 6

An operator checklist for narrowing down SERVFAIL errors in DNS and preventing recurrence.

highDNS6 min read
 DNS

DNS NXDOMAIN first triage response

A DNS first triage note for NXDOMAIN: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

highDNS5 min read
 DNS

DNS SERVFAIL first triage response

A DNS first triage note for SERVFAIL: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS6 min read
 DNS

DNS CNAME first triage response

A DNS first triage note for CNAME: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS7 min read
 DNS

DNS TXT first triage response

A DNS first triage note for TXT: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

mediumDNS8 min read
 DNS

DNS NS first triage response

A DNS first triage note for NS: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS5 min read
 DNS

DNS A record first triage response

A DNS first triage note for A record: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS6 min read
 DNS

DNS AAAA first triage response

A DNS first triage note for AAAA: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

highDNS7 min read
 DNS

DNS CAA first triage response

A DNS first triage note for CAA: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS8 min read
 DNS

DNS MX first triage response

A DNS first triage note for MX: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS5 min read
 DNS

DNS TTL first triage response

A DNS first triage note for TTL: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

mediumDNS6 min read
 DNS

DNS NXDOMAIN post-release regression response

A DNS post-release regression note for NXDOMAIN: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS7 min read
 DNS

DNS SERVFAIL post-release regression response

A DNS post-release regression note for SERVFAIL: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS8 min read
 DNS

DNS CNAME post-release regression response

A DNS post-release regression note for CNAME: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

highDNS5 min read
 DNS

DNS TXT post-release regression response

A DNS post-release regression note for TXT: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS6 min read
 DNS

DNS NS post-release regression response

A DNS post-release regression note for NS: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS7 min read
 DNS

DNS A record post-release regression response

A DNS post-release regression note for A record: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

mediumDNS8 min read
 DNS

DNS AAAA post-release regression response

A DNS post-release regression note for AAAA: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS5 min read
 DNS

DNS CAA post-release regression response

A DNS post-release regression note for CAA: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS6 min read
 DNS

DNS MX post-release regression response

A DNS post-release regression note for MX: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

highDNS7 min read
 DNS

DNS TTL post-release regression response

A DNS post-release regression note for TTL: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS8 min read
 DNS

DNS NXDOMAIN affected user or permission response

A DNS affected user or permission note for NXDOMAIN: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS5 min read
 DNS

DNS SERVFAIL affected user or permission response

A DNS affected user or permission note for SERVFAIL: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

mediumDNS6 min read
 DNS

DNS CNAME affected user or permission response

A DNS affected user or permission note for CNAME: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS7 min read
 DNS

DNS TXT affected user or permission response

A DNS affected user or permission note for TXT: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS8 min read
 DNS

DNS NS affected user or permission response

A DNS affected user or permission note for NS: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

highDNS5 min read
 DNS

DNS A record affected user or permission response

A DNS affected user or permission note for A record: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS6 min read
 DNS

DNS AAAA affected user or permission response

A DNS affected user or permission note for AAAA: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS7 min read
 DNS

DNS CAA affected user or permission response

A DNS affected user or permission note for CAA: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

mediumDNS8 min read
 DNS

DNS MX affected user or permission response

A DNS affected user or permission note for MX: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS5 min read
 DNS

DNS TTL affected user or permission response

A DNS affected user or permission note for TTL: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS6 min read
 DNS

DNS NXDOMAIN specific path failure response

A DNS specific path failure note for NXDOMAIN: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

highDNS7 min read
 DNS

DNS SERVFAIL specific path failure response

A DNS specific path failure note for SERVFAIL: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS8 min read
 DNS

DNS CNAME specific path failure response

A DNS specific path failure note for CNAME: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS5 min read
 DNS

DNS TXT specific path failure response

A DNS specific path failure note for TXT: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

mediumDNS6 min read
 DNS

DNS NS specific path failure response

A DNS specific path failure note for NS: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS7 min read
 DNS

DNS A record specific path failure response

A DNS specific path failure note for A record: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS8 min read
 DNS

DNS AAAA specific path failure response

A DNS specific path failure note for AAAA: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

highDNS5 min read
 DNS

DNS CAA specific path failure response

A DNS specific path failure note for CAA: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS6 min read
 DNS

DNS MX specific path failure response

A DNS specific path failure note for MX: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS7 min read
 DNS

DNS TTL specific path failure response

A DNS specific path failure note for TTL: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

mediumDNS8 min read
 DNS

DNS NXDOMAIN proxy versus origin split response

A DNS proxy versus origin split note for NXDOMAIN: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS5 min read
 DNS

DNS SERVFAIL proxy versus origin split response

A DNS proxy versus origin split note for SERVFAIL: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS6 min read
 DNS

DNS CNAME proxy versus origin split response

A DNS proxy versus origin split note for CNAME: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

highDNS7 min read
 DNS

DNS TXT proxy versus origin split response

A DNS proxy versus origin split note for TXT: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS8 min read
 DNS

DNS NS proxy versus origin split response

A DNS proxy versus origin split note for NS: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS5 min read
 DNS

DNS A record proxy versus origin split response

A DNS proxy versus origin split note for A record: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

mediumDNS6 min read
 DNS

DNS AAAA proxy versus origin split response

A DNS proxy versus origin split note for AAAA: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS7 min read
 DNS

DNS CAA proxy versus origin split response

A DNS proxy versus origin split note for CAA: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS8 min read
 DNS

DNS MX proxy versus origin split response

A DNS proxy versus origin split note for MX: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

highDNS5 min read
 DNS

DNS TTL proxy versus origin split response

A DNS proxy versus origin split note for TTL: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS6 min read
 DNS

DNS NXDOMAIN timeout and load response

A DNS timeout and load note for NXDOMAIN: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS7 min read
 DNS

DNS SERVFAIL timeout and load response

A DNS timeout and load note for SERVFAIL: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

mediumDNS8 min read
 DNS

DNS CNAME timeout and load response

A DNS timeout and load note for CNAME: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS5 min read
 DNS

DNS TXT timeout and load response

A DNS timeout and load note for TXT: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS6 min read
 DNS

DNS NS timeout and load response

A DNS timeout and load note for NS: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

highDNS7 min read
 DNS

DNS A record timeout and load response

A DNS timeout and load note for A record: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS8 min read
 DNS

DNS AAAA timeout and load response

A DNS timeout and load note for AAAA: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS5 min read
 DNS

DNS CAA timeout and load response

A DNS timeout and load note for CAA: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

mediumDNS6 min read
 DNS

DNS MX timeout and load response

A DNS timeout and load note for MX: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS7 min read
 DNS

DNS TTL timeout and load response

A DNS timeout and load note for TTL: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS8 min read
 DNS

DNS NXDOMAIN cache or propagation drift response

A DNS cache or propagation drift note for NXDOMAIN: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

highDNS5 min read
 DNS

DNS SERVFAIL cache or propagation drift response

A DNS cache or propagation drift note for SERVFAIL: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS6 min read
 DNS

DNS CNAME cache or propagation drift response

A DNS cache or propagation drift note for CNAME: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS7 min read
 DNS

DNS TXT cache or propagation drift response

A DNS cache or propagation drift note for TXT: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

mediumDNS8 min read
 DNS

DNS NS cache or propagation drift response

A DNS cache or propagation drift note for NS: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS5 min read
 DNS

DNS A record cache or propagation drift response

A DNS cache or propagation drift note for A record: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS6 min read
 DNS

DNS AAAA cache or propagation drift response

A DNS cache or propagation drift note for AAAA: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

highDNS7 min read
 DNS

DNS CAA cache or propagation drift response

A DNS cache or propagation drift note for CAA: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS8 min read
 DNS

DNS MX cache or propagation drift response

A DNS cache or propagation drift note for MX: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS5 min read
 DNS

DNS TTL cache or propagation drift response

A DNS cache or propagation drift note for TTL: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

mediumDNS6 min read
 DNS

DNS NXDOMAIN local versus production drift response

A DNS local versus production drift note for NXDOMAIN: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS7 min read
 DNS

DNS SERVFAIL local versus production drift response

A DNS local versus production drift note for SERVFAIL: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS8 min read
 DNS

DNS CNAME local versus production drift response

A DNS local versus production drift note for CNAME: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

highDNS5 min read
 DNS

DNS TXT local versus production drift response

A DNS local versus production drift note for TXT: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS6 min read
 DNS

DNS NS local versus production drift response

A DNS local versus production drift note for NS: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS7 min read
 DNS

DNS A record local versus production drift response

A DNS local versus production drift note for A record: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

mediumDNS8 min read
 DNS

DNS AAAA local versus production drift response

A DNS local versus production drift note for AAAA: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS5 min read
 DNS

DNS CAA local versus production drift response

A DNS local versus production drift note for CAA: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS6 min read
 DNS

DNS MX local versus production drift response

A DNS local versus production drift note for MX: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

highDNS7 min read
 DNS

DNS TTL local versus production drift response

A DNS local versus production drift note for TTL: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS8 min read
 DNS

DNS NXDOMAIN data or input state response

A DNS data or input state note for NXDOMAIN: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS5 min read
 DNS

DNS SERVFAIL data or input state response

A DNS data or input state note for SERVFAIL: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

mediumDNS6 min read
 DNS

DNS CNAME data or input state response

A DNS data or input state note for CNAME: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS7 min read
 DNS

DNS TXT data or input state response

A DNS data or input state note for TXT: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS8 min read
 DNS

DNS NS data or input state response

A DNS data or input state note for NS: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

highDNS5 min read
 DNS

DNS A record data or input state response

A DNS data or input state note for A record: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS6 min read
 DNS

DNS AAAA data or input state response

A DNS data or input state note for AAAA: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS7 min read
 DNS

DNS CAA data or input state response

A DNS data or input state note for CAA: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

mediumDNS8 min read
 DNS

DNS MX data or input state response

A DNS data or input state note for MX: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS5 min read
 DNS

DNS TTL data or input state response

A DNS data or input state note for TTL: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS6 min read
 DNS

DNS NXDOMAIN safe restart decision response

A DNS safe restart decision note for NXDOMAIN: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

highDNS7 min read
 DNS

DNS SERVFAIL safe restart decision response

A DNS safe restart decision note for SERVFAIL: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS8 min read
 DNS

DNS CNAME safe restart decision response

A DNS safe restart decision note for CNAME: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS5 min read
 DNS

DNS TXT safe restart decision response

A DNS safe restart decision note for TXT: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

mediumDNS6 min read
 DNS

DNS NS safe restart decision response

A DNS safe restart decision note for NS: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS7 min read
 DNS

DNS A record safe restart decision response

A DNS safe restart decision note for A record: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS8 min read
 DNS

DNS AAAA safe restart decision response

A DNS safe restart decision note for AAAA: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

highDNS5 min read
 DNS

DNS CAA safe restart decision response

A DNS safe restart decision note for CAA: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS6 min read
 DNS

DNS MX safe restart decision response

A DNS safe restart decision note for MX: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS7 min read
 DNS

DNS TTL safe restart decision response

A DNS safe restart decision note for TTL: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

mediumDNS8 min read
 DNS

DNS NXDOMAIN rollback or roll-forward response

A DNS rollback or roll-forward note for NXDOMAIN: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS5 min read
 DNS

DNS SERVFAIL rollback or roll-forward response

A DNS rollback or roll-forward note for SERVFAIL: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS6 min read
 DNS

DNS CNAME rollback or roll-forward response

A DNS rollback or roll-forward note for CNAME: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

highDNS7 min read
 DNS

DNS TXT rollback or roll-forward response

A DNS rollback or roll-forward note for TXT: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS8 min read
 DNS

DNS NS rollback or roll-forward response

A DNS rollback or roll-forward note for NS: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

lowDNS5 min read
 DNS

DNS A record rollback or roll-forward response

A DNS rollback or roll-forward note for A record: DNS resolution failure caused by missing records, wrong authority, stale TTL, policy records, or service target mismatch. It includes evidence, output examples, branches, and the smallest reliable fix.

mediumDNS6 min read