The Basics
- Nextcloud Server version (e.g., 29.x.x):
33.0.0
- Operating system and version (e.g., Ubuntu 24.04):
Debian 13.2
- Web server and version (e.g, Apache 2.4.25):
- Apache 2.4.66
- Reverse proxy and version _(e.g. nginx 1.27.2)
NPM 2.13.7
- PHP version (e.g, 8.3):
8.3.30
- Is this the first time you’ve seen this error? (Yes / No):
YES
- When did this problem seem to first start?
replace me
- Installation method (e.g. AlO, NCP, Bare Metal/Archive, etc.)
AIO
- Are you using CloudfIare, mod_security, or similar? (Yes / No)
Yes, Cloudflaree
Summary of the issue you are facing:
I use Cloudflare-Tunnek with a mTLS certificate. Access via the browser works. However, synchronization with DAVx5 fails. In the Nextcloud log, I only find the message “Request does not pass strict cookie check,” without any further details.
Steps to replicate it (hint: details matter!):
-
Setup cloudflare tunnel with mTLS
-
Setup DAVx5 in local Network with mTLS Certifiacte
-
Sync DAVx5 in local network –> works
-
Login to Nextlcoud with browser outside local network –> works
-
Sync DAVx5 outside local network –> fails
Log entries
Nextcloud
Please provide the log entries from your Nextcloud log that are generated during the time of problem (via the Copy raw option from Administration settings->Logging screen or from your nextcloud.log located in your data directory). Feel free to use a pastebin/gist service if necessary.
{"reqId":"eZUdB7NaJoMXvVx54p51","level":2,"time":"2026-02-22T10:20:58+00:00","remoteAddr":"192.168.178.211","user":"me","app":"core","method":"PROPFIND","url":"/remote.php/dav/calendars/me/familie/","scriptName":"/remote.php","message":"Request does not pass strict cookie check","userAgent":"DAVx5/4.5.9-gplay (dav4jvm; okhttp/5.3.2) Android/16","version":"33.0.0.16","data":{"app":"core"},"id":"699ada3224845"}
Web Browser
If the problem is related to the Web interface, open your browser inspector Console and Network tabs while refreshing (reloading) and reproducing the problem. Provide any relevant output/errors here that appear.
PASTE
Web server / Reverse Proxy
The output of your Apache/nginx/system log in /var/log/____:
PASTE HERE
Configuration
Nextcloud
The output of occ config:list system or similar is best, but, if not possible, the contents of your config.php file from /path/to/nextcloud is fine (make sure to remove any identifiable information!):
{
"system": {
"one-click-instance": true,
"one-click-instance.user-limit": 100,
"memcache.local": "\\OC\\Memcache\\APCu",
"apps_paths": [
{
"path": "\/var\/www\/html\/apps",
"url": "\/apps",
"writable": false
},
{
"path": "\/var\/www\/html\/custom_apps",
"url": "\/custom_apps",
"writable": true
}
],
"check_data_directory_permissions": false,
"memcache.distributed": "\\OC\\Memcache\\Redis",
"memcache.locking": "\\OC\\Memcache\\Redis",
"redis": {
"host": "***REMOVED SENSITIVE VALUE***",
"password": "***REMOVED SENSITIVE VALUE***",
"port": 6379
},
"overwritehost": "nextcloud.mydomain.de",
"overwriteprotocol": "https",
"passwordsalt": "***REMOVED SENSITIVE VALUE***",
"secret": "***REMOVED SENSITIVE VALUE***",
"trusted_domains": [
"localhost",
"nextcloud.mydomain.de"
],
"datadirectory": "***REMOVED SENSITIVE VALUE***",
"dbtype": "pgsql",
"version": "33.0.0.16",
"overwrite.cli.url": "https:\/\/nextcloud.mydomain.de\/",
"dbname": "***REMOVED SENSITIVE VALUE***",
"dbhost": "***REMOVED SENSITIVE VALUE***",
"dbtableprefix": "oc_",
"dbuser": "***REMOVED SENSITIVE VALUE***",
"dbpassword": "***REMOVED SENSITIVE VALUE***",
"installed": true,
"instanceid": "***REMOVED SENSITIVE VALUE***",
"maintenance": false,
"updatechecker": true,
"updatedirectory": "\/nc-updater",
"loglevel": 2,
"app_install_overwrite": [
"nextcloud-aio"
],
"log_type": "file",
"logfile": "\/var\/www\/html\/data\/nextcloud.log",
"log_rotate_size": 10485760,
"log.condition": {
"apps": [
"admin_audit"
]
},
"preview_max_x": 2048,
"preview_max_y": 2048,
"jpeg_quality": 60,
"enabledPreviewProviders": {
"1": "OC\\Preview\\Image",
"2": "OC\\Preview\\MarkDown",
"3": "OC\\Preview\\MP3",
"4": "OC\\Preview\\TXT",
"5": "OC\\Preview\\OpenDocument",
"6": "OC\\Preview\\Movie",
"7": "OC\\Preview\\Krita",
"0": "OC\\Preview\\Imaginary",
"23": "OC\\Preview\\ImaginaryPDF"
},
"enable_previews": true,
"upgrade.disable-web": true,
"mail_smtpmode": "smtp",
"trashbin_retention_obligation": "auto, 30",
"versions_retention_obligation": "auto, 30",
"activity_expire_days": 30,
"simpleSignUpLink.shown": false,
"share_folder": "\/Shared",
"one-click-instance.link": "https:\/\/nextcloud.com\/all-in-one\/",
"upgrade.cli-upgrade-link": "https:\/\/github.com\/nextcloud\/all-in-one\/discussions\/2726",
"maintenance_window_start": 100,
"allow_local_remote_servers": true,
"davstorage.request_timeout": 3600,
"documentation_url.server_logs": "https:\/\/github.com\/nextcloud\/all-in-one\/discussions\/5425",
"htaccess.RewriteBase": "\/",
"dbpersistent": false,
"auth.bruteforce.protection.enabled": true,
"ratelimit.protection.enabled": true,
"files_external_allow_create_new_local": false,
"trusted_proxies": "***REMOVED SENSITIVE VALUE***",
"onlyoffice": {
"editors_check_interval": 0,
"jwt_secret": "***REMOVED SENSITIVE VALUE***",
"jwt_header": "AuthorizationJwt"
},
"preview_imaginary_url": "***REMOVED SENSITIVE VALUE***",
"preview_imaginary_key": "***REMOVED SENSITIVE VALUE***",
"config_preset": 2,
"mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
"mail_smtpname": "***REMOVED SENSITIVE VALUE***",
"mail_domain": "***REMOVED SENSITIVE VALUE***",
"mail_from_address": "***REMOVED SENSITIVE VALUE***",
"mail_smtphost": "***REMOVED SENSITIVE VALUE***",
"mail_smtpauth": true,
"mail_smtpport": "587",
"mail_sendmailmode": "smtp",
"mail_smtpstreamoptions": {
"ssl": {
"allow_self_signed": false,
"verify_peer": true,
"verify_peer_name": true
}
},
"AIO_VERSION": "v12.7.0",
"DOMAIN": "nextcloud.mydomain.de"
},
"apps": {
"activity": {
"enabled": "yes",
"types": "filesystem",
"installed_version": "6.0.0-dev.0"
},
"admin_audit": {
"installed_version": "1.23.0",
"types": "logging",
"enabled": "yes",
"logfile": "\/var\/www\/html\/data\/audit.log"
},
"app_api": {
"types": "",
"installed_version": "33.0.0",
"enabled": "no"
},
"backgroundjob": {
"lastjob": "52855462516432897"
},
"bruteForce": {
"whitelist_1": "192.168.178.50\/24",
"whitelist_1_comment": "Desktop"
},
"bruteforcesettings": {
"enabled": "yes",
"types": "",
"installed_version": "6.0.0-dev.0"
},
"calendar": {
"installed_version": "6.2.0",
"types": "",
"enabled": "yes"
},
"circles": {
"enabled": "yes",
"types": "filesystem,dav",
"installed_version": "33.0.0",
"loopback_tmp_scheme": "https",
"migration_22": "1",
"migration_run": "0",
"loopback_tmp_path": "\/",
"maintenance_run": "0",
"maintenance_update": "{\"3\":1771755559,\"2\":1771756155,\"1\":1771756453}"
},
"cloud_federation_api": {
"enabled": "yes",
"types": "filesystem",
"installed_version": "1.17.0"
},
"comments": {
"enabled": "yes",
"types": "logging",
"installed_version": "1.23.0"
},
"contacts": {
"installed_version": "8.3.3",
"types": "dav",
"enabled": "yes"
},
"contactsinteraction": {
"enabled": "yes",
"types": "dav",
"installed_version": "1.14.1"
},
"core": {
"vendor": "nextcloud",
"installedat": "1771504923.6900",
"lastupdatedat": 1771755832,
"public_files": "files_sharing\/public.php",
"moveavatarsdone": "yes",
"previewsCleanedUp": "1",
"lastupdateResult": "[]",
"backgroundjobs_mode": "cron",
"metadataGenerationDone": true,
"previewMovedDone": true,
"lastcron": 1771756453,
"emailTestSuccessful": "1",
"shareapi_default_expire_date": true,
"shareapi_enforce_expire_date": true,
"oc.integritycheck.checker": [],
"files_metadata": {
"photos-original_date_time": {
"value": null,
"type": "int",
"etag": "",
"indexed": true,
"editPermission": 0
},
"photos-exif": {
"value": null,
"type": "array",
"etag": "",
"indexed": false,
"editPermission": 0
},
"photos-ifd0": {
"value": null,
"type": "array",
"etag": "",
"indexed": false,
"editPermission": 0
},
"photos-size": {
"value": null,
"type": "array",
"etag": "",
"indexed": false,
"editPermission": 0
},
"blurhash": {
"value": null,
"type": "string",
"etag": "66fc5e16f0fbc33e135a424ecd06f506",
"indexed": false,
"editPermission": 0
}
}
},
"dashboard": {
"enabled": "yes",
"types": "",
"installed_version": "7.13.0"
},
"dav": {
"enabled": "yes",
"types": "filesystem",
"installed_version": "1.36.0",
"hasCustomDefaultContact": false,
"regeneratedBirthdayCalendarsForYearFix": "yes",
"buildCalendarSearchIndex": "yes",
"buildCalendarReminderIndex": "yes",
"chunks_migrated": "1",
"enableDefaultContact": false,
"create_example_event": false,
"builtSocialSearchIndex": true,
"system_addressbook_exposed": false
},
"deck": {
"installed_version": "1.17.0",
"types": "dav",
"enabled": "yes"
},
"federatedfilesharing": {
"enabled": "yes",
"types": "",
"installed_version": "1.23.0"
},
"federation": {
"enabled": "yes",
"types": "authentication",
"installed_version": "1.23.0"
},
"files": {
"enabled": "yes",
"types": "filesystem",
"installed_version": "2.5.0",
"mimetype_version": "33.0.0.16"
},
"files_downloadlimit": {
"enabled": "yes",
"types": "",
"installed_version": "5.1.0-dev.0"
},
"files_external": {
"installed_version": "1.25.1",
"types": "filesystem",
"enabled": "yes",
"allow_user_mounting": false
},
"files_fulltextsearch": {
"files_local": true,
"files_external": 1,
"files_group_folders": false,
"files_size": 20,
"files_open_result_directly": true,
"installed_version": "33.0.0",
"types": "filesystem",
"files_pdf": true,
"files_office": true,
"enabled": "no"
},
"files_pdfviewer": {
"enabled": "yes",
"types": "",
"installed_version": "6.0.0-dev.0"
},
"files_reminders": {
"enabled": "yes",
"types": "",
"installed_version": "1.6.0"
},
"files_sharing": {
"enabled": "yes",
"types": "filesystem",
"installed_version": "1.25.2"
},
"files_trashbin": {
"enabled": "yes",
"types": "filesystem,dav",
"installed_version": "1.23.0",
"background_job_expire_trash_offset": 0
},
"files_versions": {
"enabled": "yes",
"types": "filesystem,dav",
"installed_version": "1.26.0"
},
"firstrunwizard": {
"enabled": "yes",
"types": "",
"installed_version": "6.0.0-dev.0"
},
"fulltextsearch": {
"app_navigation": true,
"installed_version": "33.0.0",
"types": "",
"enabled": "no",
"search_platform": "OCA\\FullTextSearch_Elasticsearch\\Platform\\ElasticSearchPlatform"
},
"fulltextsearch_elasticsearch": {
"installed_version": "33.0.0",
"enabled": "no",
"types": "",
"elastic_host": "http:\/\/elastic:08b9125652235db70735dcc2bc52d48afa2c65e7d4fdf075@nextcloud-aio-fulltextsearch:9200",
"elastic_index": "nextcloud-aio"
},
"guests": {
"installed_version": "4.6.0",
"types": "authentication",
"enabled": "yes"
},
"logreader": {
"enabled": "yes",
"types": "logging",
"installed_version": "6.0.0"
},
"lookup_server_connector": {
"enabled": "yes",
"types": "authentication",
"installed_version": "1.21.0"
},
"mail": {
"installed_version": "5.7.0",
"types": "",
"enabled": "yes"
},
"nextcloud-aio": {
"installed_version": "0.8.0",
"types": "",
"enabled": "yes"
},
"nextcloud_announcements": {
"enabled": "yes",
"installed_version": "5.0.0",
"types": "logging",
"pub_date": "Thu, 24 Oct 2019 00:00:00 +0200"
},
"notes": {
"installed_version": "4.13.0",
"types": "",
"enabled": "yes"
},
"notifications": {
"enabled": "yes",
"types": "logging",
"installed_version": "6.0.0"
},
"notify_push": {
"installed_version": "1.3.0",
"types": "filesystem",
"enabled": "yes",
"base_endpoint": "https:\/\/nextcloud.mydomain.de\/push"
},
"oauth2": {
"enabled": "yes",
"types": "authentication",
"installed_version": "1.21.0"
},
"onlyoffice": {
"jwt_secret": "***REMOVED SENSITIVE VALUE***",
"DocumentServerUrl": "https:\/\/nextcloud.mydomain.de\/onlyoffice"
},
"password_policy": {
"enabled": "yes",
"types": "authentication",
"installed_version": "5.0.0-dev.0"
},
"photos": {
"enabled": "yes",
"types": "dav,authentication",
"installed_version": "6.0.0-dev.0",
"lastPlaceMappedUser": "admin",
"lastPlaceMappingDone": "true"
},
"preview": {
"jpeg_quality": "60"
},
"privacy": {
"enabled": "yes",
"types": "",
"installed_version": "5.0.0-dev.0"
},
"profile": {
"enabled": "yes",
"types": "",
"installed_version": "1.2.0"
},
"provisioning_api": {
"enabled": "yes",
"types": "prevent_group_restriction",
"installed_version": "1.23.0"
},
"recommendations": {
"enabled": "yes",
"types": "",
"installed_version": "6.0.0-dev.0"
},
"related_resources": {
"enabled": "yes",
"types": "",
"installed_version": "4.0.0-dev.0"
},
"richdocuments": {
"enabled": "yes",
"installed_version": "10.1.0",
"types": "filesystem,prevent_group_restriction",
"wopi_allowlist": "192.168.178.230,127.0.0.0\/8,192.168.0.0\/16,172.16.0.0\/12,10.0.0.0\/8,100.64.0.0\/10,fd00::\/8,::1\/128",
"wopi_url": "http:\/\/nextcloud-aio-apache:23973",
"wopi_callback_url": "http:\/\/nextcloud-aio-apache:23973",
"public_wopi_url": "https:\/\/nextcloud.mydomain.de",
"doc_format": "ooxml"
},
"serverinfo": {
"enabled": "yes",
"types": "",
"installed_version": "5.0.0-dev.0",
"cached_count_appdata_files": 406,
"size_appdata_storage": 8345530,
"cached_count_filecache": 112570,
"cached_count_storages": 11
},
"settings": {
"enabled": "yes",
"types": "",
"installed_version": "1.16.0"
},
"sharebymail": {
"enabled": "yes",
"types": "filesystem",
"installed_version": "1.23.0"
},
"snappymail": {
"enabled": "no",
"installed_version": "2.38.2",
"types": ""
},
"support": {
"enabled": "yes",
"types": "session",
"SwitchUpdaterServerHasRun": "yes",
"installed_version": "5.0.0"
},
"survey_client": {
"enabled": "yes",
"types": "",
"installed_version": "5.0.0-dev.0"
},
"suspicious_login": {
"installed_version": "11.0.0-dev.0",
"types": "authentication",
"enabled": "yes"
},
"systemtags": {
"enabled": "yes",
"types": "logging",
"installed_version": "1.23.0"
},
"tasks": {
"installed_version": "0.17.1",
"types": "",
"enabled": "yes"
},
"text": {
"enabled": "yes",
"types": "dav",
"installed_version": "7.0.0-dev.3"
},
"theming": {
"enabled": "yes",
"types": "logging",
"installed_version": "2.8.0"
},
"thesearchpage": {
"installed_version": "2.1.0",
"types": "",
"enabled": "yes"
},
"twofactor_backupcodes": {
"types": "",
"installed_version": "1.22.0",
"enabled": "yes"
},
"twofactor_nextcloud_notification": {
"installed_version": "7.0.0",
"types": "",
"enabled": "yes"
},
"twofactor_totp": {
"installed_version": "15.0.0-dev.0",
"types": "",
"enabled": "yes"
},
"twofactor_webauthn": {
"installed_version": "2.6.0",
"types": "",
"enabled": "yes"
},
"unsplash": {
"enabled": "no",
"installed_version": "3.1.0",
"types": ""
},
"updatenotification": {
"enabled": "yes",
"types": "",
"installed_version": "1.23.0",
"update_check_errors": 0,
"notify_groups": "[\"admin\"]"
},
"user_status": {
"types": "",
"installed_version": "1.13.0",
"enabled": "yes"
},
"viewer": {
"enabled": "yes",
"types": "",
"installed_version": "6.0.0-dev.0"
},
"weather_status": {
"enabled": "yes",
"types": "",
"installed_version": "1.13.0"
},
"webhook_listeners": {
"enabled": "yes",
"types": "filesystem",
"installed_version": "1.5.0"
},
"whiteboard": {
"enabled": "no",
"installed_version": "1.5.6",
"types": "",
"collabBackendUrl": "https:\/\/nextcloud.mydomain.de\/whiteboard",
"jwt_secret_key": "***REMOVED SENSITIVE VALUE***"
},
"workflowengine": {
"enabled": "yes",
"types": "filesystem",
"installed_version": "2.15.0"
}
}
}
Apps
The output of occ app:list (if possible).
Tips for increasing the likelihood of a response
- Use the
preformatted textformatting option in the editor for all log entries and configuration output. - If screenshots are useful, feel free to include them.
- If possible, also include key error output in text form so it can be searched for.
- Try to edit log output only minimally (if at all) so that it can be ran through analyzers / formatters by those trying to help you.