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Why does the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error occur when opening a file located in Google Storage? google-cloud-storage cloudflare. I ... Home Public Questions Tags Users Collectives ExploreCollectives FindaJob Jobs Companies Teams StackOverflowforTeams –Collaborateandshareknowledgewithaprivategroup. CreateafreeTeam WhatisTeams? Teams CreatefreeTeam CollectivesonStackOverflow Findcentralized,trustedcontentandcollaboratearoundthetechnologiesyouusemost. Learnmore Teams Q&Aforwork Connectandshareknowledgewithinasinglelocationthatisstructuredandeasytosearch. Learnmore WhydoestheERR_SSL_VERSION_OR_CIPHER_MISMATCHerroroccurwhenopeningafilelocatedinGoogleStorage? AskQuestion Asked 4monthsago Active 4monthsago Viewed 101times -1 IhaveseveralappsthatworkwithGoogleStorage.Oneoftheseappshasstoppeddisplayingimagesinitsinterface. Theapplicationcodehasnothingtodowithit-allfilesareuploadedintoGSsuccessfully. TheproblemisontheCloudflaresideorsomewherenearit.Althoughallotherapplicationsareconfiguredidentically. InCloudflare,allappshaveasimilarentry: CNAMEfilesc.storage.googleapis.comTTLAutoProxied Onlythedomainchanges,ofcourse. AndonlyonedomaingetsanerrorwhenusingaURLwithHTTPS:ERR_SSL_VERSION_OR_CIPHER_MISMATCH. IfreplaceHTTPSwithHTTP,thenthefilewillbeopened. Whatcouldbetheproblem,sinceIusethesamesettingseverywhereinCloudflare? google-cloud-storagecloudflare Share Improvethisquestion Follow askedJul2at13:17 ColibriColibri 69566silverbadges2222bronzebadges 4 Well,ofcourse,ifyouuseHTTPyouwon'tgetanycertificateerrors,becauseitwon'tusecertificates.Checkthecertificateofthatspecificdomainthatfails.Thereissomethingwrongwithit.Eitheritstoooldthatitonlysupportsoldversionsofsslorprivatekeyandcertdon'tmatch – derpirscher Jul2at13:57 @derpirscherWhatexactlydoIneedtocheck?Thenginxserverdoesn'ttakepartinthis.Cloudflareisconfigured"flexible"inSSL/TLS(justlikeotherapplicationsinCloudflare).Inthe"EdgeCertificates"tabthesettingsarealsoidentical. – Colibri Jul2at14:38 Ihavenoexperiencewithcloudflare,soIcan'thelpyouthere.Butthecertificateforthatparticulardomainobviouslyhassomeissues.Howdidyouobtainit?Maybeyoucangenerateanewoneandreplacetheexistingone? – derpirscher Jul2at14:41 @derpirscherIdidnottouchthecertificateatall.ItisprovidedbyCloudflarewhenProxyisenabledintheirpanel. – Colibri Jul2at15:42 Addacomment  |  2Answers 2 Active Oldest Votes 1 Itwasnecessarytoenablethisoption: Share Improvethisanswer Follow answeredJul2at16:54 ColibriColibri 69566silverbadges2222bronzebadges Addacomment  |  1 IbelieveyouwouldhavetodisabletheUniversalCertificateORmaybeturntheCNAMEtogreycloudedonCloudflare. ApparentlyCloudflarewillgettheSSLuptosinglelevelsub-domainsonlyi.e.sub.domain.tldbuttheGCSdomainisbeyondthat.Ihadthesameissueforoneofmysubdomains"sub2.sub.domain.tld"andIendedupchangingittosub2-sub.domain.tldbutIdon'tthinkthat'spossibleinyourcase. HereisthelinktoCloudflareforumsforthesame SoifyouwanttousetheirUniversalSSLyou'llhavetoupgradeyourplantoBusiness. Share Improvethisanswer Follow editedJul2at18:03 answeredJul2at17:57 DharmarajDharmaraj 16.9k22goldbadges1313silverbadges3939bronzebadges Addacomment  |  YourAnswer ThanksforcontributingananswertoStackOverflow!Pleasebesuretoanswerthequestion.Providedetailsandshareyourresearch!Butavoid…Askingforhelp,clarification,orrespondingtootheranswers.Makingstatementsbasedonopinion;backthemupwithreferencesorpersonalexperience.Tolearnmore,seeourtipsonwritinggreatanswers. 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