DNS Resolution Failure
59 incident problems that show up as “DNS Resolution Failure”.
먼저 읽을 가이드
추천 문제
All problems (59)
NETWORK-300A DNS resolver cluster still answers while one firewall update blocks only the TCP fallback path for large DNSSEC-signed replies during a failover rehearsalMost lookups work and the larger signed ones expose the hidden protocol gap. Normal traffic masked the issue until the standby or alternate path became active under rehearsal conditions.NetworkIntermediate17 minProSECURITY-429A DNS sinkhole activates for new queries (DNS Resolution Failure)A DNS sinkhole activates for new queries (DNS Resolution Failure) focuses on cloud-security-and-governance and asks the reader to isolate DNS Resolution Failure. 실무에서는 dns-resolution-failure 경보만 보는 대신 자산 범위, 권한 변경 이력, 인증서나 정책 만료, 우회 경로 존재 여부를 같이 확인해야 대응 우선순위를 제대로 잡을 수 있습니다.SecurityIntermediate17 minProSECURITY-306A DNS-based security control blocks new lookups while stale resolver cache still serves the previous answer for the same host during a failover rehearsalThe control is correct now and one cache layer still trusts yesterday. Normal traffic masked the issue until the standby or alternate path became active under rehearsal conditions.SecurityIntermediate17 minProK8S-300A headless Service gives every pod address while the client library still randomizes from a stale cached subset after scale-down during a failover rehearsalService discovery is accurate and the client keeps dialing endpoints that no longer exist. Normal traffic masked the issue until the standby or alternate path became active under rehearsal conditions.KubernetesIntermediate17 minProK8S-258A stubDomain forwards internal names correctly while negative caching at node-local DNS hides newly created services during a failover rehearsalThe forwarding chain is right, but one layer remembers failure longer than the service lifecycle. Normal traffic masked the issue until the standby or alternate path became active under rehearsal conditions.KubernetesIntermediate17 minProK8S-180Cluster DNS is correct while one client runtime caches the first answer indefinitely during a failover rehearsalThe service discovery layer updates and the consuming library behaves as if nothing changed. Normal traffic masked the issue until the standby or alternate path became active under rehearsal conditions.KubernetesIntermediate17 minProNETWORK-216Small DNS lookups work while large-response TCP fallback is still blocked during a failover rehearsalResolution seems mostly healthy until response size changes the protocol path. Normal traffic masked the issue until the standby or alternate path became active under rehearsal conditions.NetworkIntermediate17 minProSECURITY-426A DNS sinkhole activates for new queries (DNS Resolution Failure)A DNS sinkhole activates for new queries (DNS Resolution Failure) focuses on cloud-security-and-governance and asks the reader to isolate DNS Resolution Failure. 실무에서는 dns-resolution-failure 경보만 보는 대신 자산 범위, 권한 변경 이력, 인증서나 정책 만료, 우회 경로 존재 여부를 같이 확인해야 대응 우선순위를 제대로 잡을 수 있습니다.SecurityIntermediate18 minProSECURITY-430A DNS sinkhole activates for new queries (DNS Resolution Failure)A DNS sinkhole activates for new queries (DNS Resolution Failure) focuses on cloud-security-and-governance and asks the reader to isolate DNS Resolution Failure. 실무에서는 dns-resolution-failure 경보만 보는 대신 자산 범위, 권한 변경 이력, 인증서나 정책 만료, 우회 경로 존재 여부를 같이 확인해야 대응 우선순위를 제대로 잡을 수 있습니다. In...SecurityIntermediate18 minProK8S-497A NetworkPolicy permits the application pathA NetworkPolicy permits the application path focuses on cluster-networking-and-service-discovery and asks the reader to isolate DNS Resolution Failure. 실무에서는 dns-resolution-failure 증상만 보고 Pod 하나에 매달리지 말고 이벤트, 이전 로그, Service/Endpoint, 최근 배포 변경을 한 번에 묶어 보는 편이 오진을 줄입니다.KubernetesIntermediate18 minProK8S-499A NetworkPolicy permits the application pathA NetworkPolicy permits the application path focuses on cluster-networking-and-service-discovery and asks the reader to isolate DNS Resolution Failure. 실무에서는 dns-resolution-failure 증상만 보고 Pod 하나에 매달리지 말고 이벤트, 이전 로그, Service/Endpoint, 최근 배포 변경을 한 번에 묶어 보는 편이 오진을 줄입니다.KubernetesIntermediate18 minProK8S-501A NetworkPolicy permits the application pathA NetworkPolicy permits the application path focuses on cluster-networking-and-service-discovery and asks the reader to isolate DNS Resolution Failure. 실무에서는 dns-resolution-failure 증상만 보고 Pod 하나에 매달리지 말고 이벤트, 이전 로그, Service/Endpoint, 최근 배포 변경을 한 번에 묶어 보는 편이 오진을 줄입니다.KubernetesIntermediate18 minProNETWORK-483A resolver answers from cache (DNS Resolution Failure)A resolver answers from cache (DNS Resolution Failure) focuses on Network Services And Operations and asks the reader to isolate DNS Resolution Failure. 실무에서는 dns-resolution-failure 이슈를 볼 때 DNS, 라우팅, ACL/방화벽, 목적지 응답을 계층별로 잘라서 확인하면 장애 구간을 훨씬 빠르게 좁힐 수 있습니다.NetworkIntermediate18 minProSECURITY-490A DNS sinkhole activates for new queries (DNS Resolution Failure)A DNS sinkhole activates for new queries (DNS Resolution Failure) focuses on cloud-security-and-governance and asks the reader to isolate DNS Resolution Failure. 실무에서는 dns-resolution-failure 경보만 보는 대신 자산 범위, 권한 변경 이력, 인증서나 정책 만료, 우회 경로 존재 여부를 같이 확인해야 대응 우선순위를 제대로 잡을 수 있습니다. In...SecurityIntermediate19 minProK8S-557A NetworkPolicy permits the application pathA NetworkPolicy permits the application path focuses on cluster-networking-and-service-discovery and asks the reader to isolate DNS Resolution Failure. 실무에서는 dns-resolution-failure 증상만 보고 Pod 하나에 매달리지 말고 이벤트, 이전 로그, Service/Endpoint, 최근 배포 변경을 한 번에 묶어 보는 편이 오진을 줄입니다.KubernetesIntermediate19 minProNETWORK-480A resolver answers from cache (DNS Resolution Failure)A resolver answers from cache (DNS Resolution Failure) focuses on Network Services And Operations and asks the reader to isolate DNS Resolution Failure. 실무에서는 dns-resolution-failure 이슈를 볼 때 DNS, 라우팅, ACL/방화벽, 목적지 응답을 계층별로 잘라서 확인하면 장애 구간을 훨씬 빠르게 좁힐 수 있습니다.NetworkIntermediate19 minProNETWORK-542A resolver answers from cache (DNS Resolution Failure)A resolver answers from cache (DNS Resolution Failure) focuses on Network Services And Operations and asks the reader to isolate DNS Resolution Failure. 실무에서는 dns-resolution-failure 이슈를 볼 때 DNS, 라우팅, ACL/방화벽, 목적지 응답을 계층별로 잘라서 확인하면 장애 구간을 훨씬 빠르게 좁힐 수 있습니다.NetworkIntermediate20 minProNETWORK-599A resolver answers from cache (DNS Resolution Failure)A resolver answers from cache (DNS Resolution Failure) focuses on Network Services And Operations and asks the reader to isolate DNS Resolution Failure. 실무에서는 dns-resolution-failure 이슈를 볼 때 DNS, 라우팅, ACL/방화벽, 목적지 응답을 계층별로 잘라서 확인하면 장애 구간을 훨씬 빠르게 좁힐 수 있습니다.NetworkIntermediate20 minProNETWORK-012After an Anycast DNS switch, only a certain region keeps getting the old IPA situation where the global switch is done but cache and regional resolver differences send only some users to the old endpoint.NetworkIntermediate23 minPro