[Bug]: External storage app ignoring proxyexclude

[drhirn]

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

Trying to mount an external Webdav storage. Nextcloud is behind a proxy to connect to the internet, but the webdav storage is in lan. No matter how I configure proxyexclude, the connection always made to the proxy.
Same with smb connections when trying to mount smb shares.
If I remove the proxy configuration completely, everything is working fine.

Steps to reproduce

1. Try to mount a local external storage with a proxy configured

Expected behavior

Proxy should be excluded when connection to targets on the lan

Nextcloud Server version

33

Operating system

RHEL/CentOS

PHP engine version

PHP 8.3

Web server

Apache (supported)

Database engine version

PostgreSQL

Is this bug present after an update or on a fresh install?

None

Are you using the Nextcloud Server Encryption module?

Encryption is Disabled

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

{
    "system": {
        "debug": true,
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "cloud-test.example.com",
            "localhost"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "overwrite.cli.url": "https:\/\/cloud-test.example.com",
        "overwriteprotocol": "https",
        "overwritehost": "cloud-test.example.com",
        "dbtype": "pgsql",
        "version": "33.0.2.2",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbtableprefix": "oc_",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "logtimezone": "Europe\/Vienna",
        "installed": true,
        "maintenance_window_start": 1,
        "mail_sendmailmode": "smtp",
        "mail_smtpmode": "smtp",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "25",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpstreamoptions": {
            "ssl": {
                "allow_self_signed": true,
                "verify_peer": false,
                "verify_peer_name": false
            }
        },
        "default_language": "de_DE",
        "maintenance": false,
        "loglevel": 0,
        "updatechecker": "true",
        "has_internet_connection": "true",
        "connectivity_check_domains": [
            "nextcloud.com"
        ],
        "proxy": "proxy.example.com:8080",
        "proxyexclude": [
            ".example.com",
            "localhost",
            "127.0.0.1",
            "webdav.example.com:5006",
            "example.com",
            "webdav.example.com"
        ],
        "twofactor_enforced": "true",
        "twofactor_enforced_groups": [],
        "twofactor_enforced_excluded_groups": [
            "no2fa"
        ],
        "defaultapp": "files",
        "default_locale": "de_AT",
        "default_phone_region": "AT",
        "apps_paths": [
            {
                "path": "\/data\/vhosts\/nextcloud\/apps",
                "url": "\/apps",
                "writable": false
            },
            {
                "path": "\/data\/vhosts\/nextcloud\/custom_apps",
                "url": "\/custom_apps",
                "writable": true
            }
        ],
        "filelocking.enabled": true,
        "memcache.local": "\\OC\\Memcache\\APCu",
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 6379,
            "timeout": 0,
            "password": "***REMOVED SENSITIVE VALUE***"
        },
        "htaccess.RewriteBase": "\/",
        "trusted_proxies": "***REMOVED SENSITIVE VALUE***",
        "theme": "",
        "app_install_overwrite": [
            "data_request",
            "groupfolders",
            "twofactor_admin",
            "impersonate",
            "user_usage_report"
        ],
        "forbidden_filename_basenames": [
            "con",
            "prn",
            "aux",
            "nul",
            "com0",
            "com1",
            "com2",
            "com3",
            "com4",
            "com5",
            "com6",
            "com7",
            "com8",
            "com9",
            "com\u00b9",
            "com\u00b2",
            "com\u00b3",
            "lpt0",
            "lpt1",
            "lpt2",
            "lpt3",
            "lpt4",
            "lpt5",
            "lpt6",
            "lpt7",
            "lpt8",
            "lpt9",
            "lpt\u00b9",
            "lpt\u00b2",
            "lpt\u00b3"
        ],
        "forbidden_filename_characters": [
            "<",
            ">",
            ":",
            "\"",
            "|",
            "?",
            "*",
            "\\",
            "\/"
        ],
        "forbidden_filename_extensions": [
            " ",
            ".",
            ".filepart",
            ".part"
        ],
        "mail_smtpauth": 1,
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "upgrade.disable-web": true,
        "templatedirectory": "",
        "skeletondirectory": "\/data\/nextcloud\/skeleton",
        "default_certificates_bundle_path": "\/etc\/pki\/tls\/certs\/ca-bundle.crt",
        "serverid": "1"
    }
}

List of activated Apps

Enabled:
  - activity: 6.0.0
  - admin_audit: 1.23.0
  - app_api: 33.0.0
  - bruteforcesettings: 6.0.0
  - calendar: 6.2.2
  - circles: 33.0.0
  - cloud_federation_api: 1.17.0
  - comments: 1.23.0
  - contacts: 8.4.4
  - contactsinteraction: 1.14.1
  - dashboard: 7.13.0
  - dav: 1.36.0
  - federatedfilesharing: 1.23.0
  - federation: 1.23.0
  - files: 2.5.0
  - files_downloadlimit: 5.1.0
  - files_external: 1.25.1
  - files_pdfviewer: 6.0.0
  - files_reminders: 1.6.0
  - files_sharing: 1.25.2
  - files_trashbin: 1.23.0
  - files_versions: 1.26.0
  - groupfolders: 21.0.7
  - impersonate: 4.0.0
  - logreader: 6.0.0
  - lookup_server_connector: 1.21.0
  - nextcloud_announcements: 5.0.0
  - notifications: 6.0.0
  - oauth2: 1.21.0
  - password_policy: 5.0.0
  - photos: 6.0.0
  - privacy: 5.0.0
  - profile: 1.2.0
  - provisioning_api: 1.23.0
  - recommendations: 6.0.0
  - related_resources: 4.0.0
  - serverinfo: 5.0.0
  - settings: 1.16.0
  - sharebymail: 1.23.0
  - support: 5.0.0
  - suspicious_login: 11.0.0
  - systemtags: 1.23.0
  - tasks: 0.17.1
  - text: 7.0.0
  - theming: 2.8.0
  - twofactor_admin: 4.11.1
  - twofactor_backupcodes: 1.22.0
  - twofactor_totp: 15.0.0
  - updatenotification: 1.23.0
  - user_retention: 1.16.0
  - user_status: 1.13.0
  - user_usage_report: 4.0.0
  - viewer: 6.0.0
  - webhook_listeners: 1.5.0
  - workflowengine: 2.15.0
Disabled:
  - data_request: 5.0.0 (installed 5.0.0)
  - deck: 1.17.0 (installed 1.17.0)
  - encryption: 2.21.0
  - firstrunwizard: 6.0.0 (installed 4.0.0)
  - sharelisting: 1.3.0 (installed 1.3.0)
  - survey_client: 5.0.0 (installed 1.13.0)
  - terms_of_service: 4.6.1 (installed 4.6.1)
  - testing: 1.23.0
  - twofactor_nextcloud_notification: 7.0.0
  - twofactor_webauthn: 2.6.0 (installed 2.6.0)
  - user_ldap: 1.24.0
  - weather_status: 1.13.0 (installed 1.1.0)

Nextcloud Signing status

No errors have been found.

Nextcloud Logs

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\"files_external\"","Code":0,"Trace":[{"file":"/data/vhosts/nextcloud/lib/private/AppConfig.php","line":492,"function":"loadConfig","class":"OC\\AppConfig","type":"->"},{"file":"/data/vhosts/nextcloud/lib/private/AppConfig.php","line":427,"function":"getTypedValue","class":"OC\\AppConfig","type":"->"},{"file":"/data/vhosts/nextcloud/apps/files_external/lib/Service/BackendService.php","line":244,"function":"getValueBool","class":"OC\\AppConfig","type":"->"},{"file":"/data/vhosts/nextcloud/apps/files_external/lib/Service/BackendService.php","line":263,"function":"isUserMountingAllowed","class":"OCA\\Files_External\\Service\\BackendService","type":"->"},{"file":"/data/vhosts/nextcloud/apps/files_external/lib/Service/BackendService.php","line":118,"function":"isAllowedUserBackend","class":"OCA\\Files_External\\Service\\BackendService","type":"->"},{"file":"/data/vhosts/nextcloud/apps/files_external/lib/Service/BackendService.php","line":132,"function":"registerBackend","class":"OCA\\Files_External\\Service\\BackendService","type":"->"},{"file":"/data/vhosts/nextcloud/apps/files_external/lib/Service/BackendService.php","line":88,"function":"registerBackends","class":"OCA\\Files_External\\Service\\BackendService","type":"->"},{"file":"/data/vhosts/nextcloud/apps/files_external/lib/Service/BackendService.php","line":189,"function":"loadBackendProviders","class":"OCA\\Files_External\\Service\\BackendService","type":"->"},{"file":"/data/vhosts/nextcloud/apps/files_external/lib/Service/StoragesService.php","line":279,"function":"getBackend","class":"OCA\\Files_External\\Service\\BackendService","type":"->"},{"file":"/data/vhosts/nextcloud/apps/files_external/lib/Service/StoragesService.php","line":70,"function":"createStorage","class":"OCA\\Files_External\\Service\\StoragesService","type":"->","args":["*** sensitive parameters replaced 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loading of lazy AppConfig values have been triggered by app \"files_external\"","exception":"{\"class\":\"RuntimeException\",\"message\":\"The loading of lazy AppConfig values have been triggered by app \\\"files_external\\\"\",\"code\":0,\"file\":\"/data/vhosts/nextcloud/lib/private/AppConfig.php:1327\",\"trace\":\"#0 /data/vhosts/nextcloud/lib/private/AppConfig.php(492): OC\\AppConfig->loadConfig()\\n#1 /data/vhosts/nextcloud/lib/private/AppConfig.php(427): OC\\AppConfig->getTypedValue()\\n#2 /data/vhosts/nextcloud/apps/files_external/lib/Service/BackendService.php(244): OC\\AppConfig->getValueBool()\\n#3 /data/vhosts/nextcloud/apps/files_external/lib/Service/BackendService.php(263): OCA\\Files_External\\Service\\BackendService->isUserMountingAllowed()\\n#4 /data/vhosts/nextcloud/apps/files_external/lib/Service/BackendService.php(118): OCA\\Files_External\\Service\\BackendService->isAllowedUserBackend()\\n#5 /data/vhosts/nextcloud/apps/files_external/lib/Service/BackendService.php(132): OCA\\Files_External\\Service\\BackendService->registerBackend()\\n#6 /data/vhosts/nextcloud/apps/files_external/lib/Service/BackendService.php(88): OCA\\Files_External\\Service\\BackendService->registerBackends()\\n#7 /data/vhosts/nextcloud/apps/files_external/lib/Service/BackendService.php(189): OCA\\Files_External\\Service\\BackendService->loadBackendProviders()\\n#8 /data/vhosts/nextcloud/apps/files_external/lib/Service/StoragesService.php(279): OCA\\Files_External\\Service\\BackendService->getBackend()\\n#9 /data/vhosts/nextcloud/apps/files_external/lib/Service/StoragesService.php(70): OCA\\Files_External\\Service\\StoragesService->createStorage()\\n#10 /data/vhosts/nextcloud/apps/files_external/lib/Service/StoragesService.php(132): OCA\\Files_External\\Service\\StoragesService->getStorageConfigFromDBMount()\\n#11 /data/vhosts/nextcloud/apps/files_external/lib/Controller/StoragesController.php(273): OCA\\Files_External\\Service\\StoragesService->getStorage()\\n#12 /data/vhosts/nextcloud/lib/private/AppFramework/Http/Dispatcher.php(205): OCA\\Files_External\\Controller\\StoragesController->show()\\n#13 /data/vhosts/nextcloud/lib/private/AppFramework/Http/Dispatcher.php(118): OC\\AppFramework\\Http\\Dispatcher->executeController()\\n#14 /data/vhosts/nextcloud/lib/private/AppFramework/App.php(153): OC\\AppFramework\\Http\\Dispatcher->dispatch()\\n#15 /data/vhosts/nextcloud/lib/private/Route/Router.php(321): OC\\AppFramework\\App::main()\\n#16 /data/vhosts/nextcloud/lib/base.php(1155): OC\\Route\\Router->match()\\n#17 /data/vhosts/nextcloud/index.php(25): OC::handleRequest()\\n#18 {main}\"}","CustomMessage":"The loading of lazy AppConfig values have been triggered by app \"files_external\""}}
{"reqId":"afxKdE71nEX-nOAvuvi9qQAAANY","level":0,"time":"2026-05-07T10:16:52+02:00","remoteAddr":"192.168.2.43","user":"username","app":"dav","method":"GET","url":"/apps/files_external/globalstorages/19","scriptName":"/index.php","message":"sending dav PROPFIND request to external storage: http://localhosthttp://webdav.example.com:5006/","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:143.0) Gecko/20100101 Firefox/143.0","version":"33.0.2.2","data":{"app":"dav"}}
{"reqId":"afxKdE71nEX-nOAvuvi9qQAAANY","level":0,"time":"2026-05-07T10:16:52+02:00","remoteAddr":"192.168.2.43","user":"username","app":"dav","method":"GET","url":"/apps/files_external/globalstorages/19","scriptName":"/index.php","message":"dav PROPFIND request to external storage: http://localhosthttp://webdav.example.com:5006/ took 6.3ms","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:143.0) Gecko/20100101 Firefox/143.0","version":"33.0.2.2","data":{"app":"dav"}}
{"reqId":"afxKdE71nEX-nOAvuvi9qQAAANY","level":0,"time":"2026-05-07T10:16:52+02:00","remoteAddr":"192.168.2.43","user":"username","app":"files_external","method":"GET","url":"/apps/files_external/globalstorages/19","scriptName":"/index.php","message":"Forbidden","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:143.0) Gecko/20100101 Firefox/143.0","version":"33.0.2.2","exception":{"Exception":"Sabre\\HTTP\\ClientHttpException","Message":"Forbidden","Code":403,"Trace":[{"file":"/data/vhosts/nextcloud/3rdparty/sabre/dav/lib/DAV/Client.php","line":300,"function":"send","class":"Sabre\\HTTP\\Client","type":"->"},{"file":"/data/vhosts/nextcloud/3rdparty/sabre/dav/lib/DAV/Client.php","line":198,"function":"doPropFind","class":"Sabre\\DAV\\Client","type":"->"},{"file":"/data/vhosts/nextcloud/lib/private/Files/Storage/DAV.php","line":291,"function":"propFind","class":"Sabre\\DAV\\Client","type":"->"},{"file":"/data/vhosts/nextcloud/lib/private/Files/Storage/DAV.php","line":591,"function":"propfind","class":"OC\\Files\\Storage\\DAV","type":"->"},{"file":"/data/vhosts/nextcloud/lib/private/Files/Storage/DAV.php","line":650,"function":"getMetaData","class":"OC\\Files\\Storage\\DAV","type":"->"},{"file":"/data/vhosts/nextcloud/lib/private/Files/Storage/Common.php","line":419,"function":"stat","class":"OC\\Files\\Storage\\DAV","type":"->"},{"file":"/data/vhosts/nextcloud/apps/files_external/lib/MountConfig.php","line":94,"function":"test","class":"OC\\Files\\Storage\\Common","type":"->"},{"file":"/data/vhosts/nextcloud/apps/files_external/lib/Controller/StoragesController.php","line":225,"function":"getBackendStatus","class":"OCA\\Files_External\\MountConfig","type":"::","args":["*** sensitive parameters replaced ***"]},{"file":"/data/vhosts/nextcloud/apps/files_external/lib/Controller/StoragesController.php","line":275,"function":"updateStorageStatus","class":"OCA\\Files_External\\Controller\\StoragesController","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/data/vhosts/nextcloud/lib/private/AppFramework/Http/Dispatcher.php","line":205,"function":"show","class":"OCA\\Files_External\\Controller\\StoragesController","type":"->"},{"file":"/data/vhosts/nextcloud/lib/private/AppFramework/Http/Dispatcher.php","line":118,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/data/vhosts/nextcloud/lib/private/AppFramework/App.php","line":153,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/data/vhosts/nextcloud/lib/private/Route/Router.php","line":321,"function":"main","class":"OC\\AppFramework\\App","type":"::"},{"file":"/data/vhosts/nextcloud/lib/base.php","line":1155,"function":"match","class":"OC\\Route\\Router","type":"->"},{"file":"/data/vhosts/nextcloud/index.php","line":25,"function":"handleRequest","class":"OC","type":"::"}],"File":"/data/vhosts/nextcloud/3rdparty/sabre/http/lib/Client.php","Line":163,"message":"Forbidden","exception":"{\"class\":\"Sabre\\HTTP\\ClientHttpException\",\"message\":\"Forbidden\",\"code\":403,\"file\":\"/data/vhosts/nextcloud/3rdparty/sabre/http/lib/Client.php:163\",\"trace\":\"#0 /data/vhosts/nextcloud/3rdparty/sabre/dav/lib/DAV/Client.php(300): Sabre\\HTTP\\Client->send()\\n#1 /data/vhosts/nextcloud/3rdparty/sabre/dav/lib/DAV/Client.php(198): Sabre\\DAV\\Client->doPropFind()\\n#2 /data/vhosts/nextcloud/lib/private/Files/Storage/DAV.php(291): Sabre\\DAV\\Client->propFind()\\n#3 /data/vhosts/nextcloud/lib/private/Files/Storage/DAV.php(591): OC\\Files\\Storage\\DAV->propfind()\\n#4 /data/vhosts/nextcloud/lib/private/Files/Storage/DAV.php(650): OC\\Files\\Storage\\DAV->getMetaData()\\n#5 /data/vhosts/nextcloud/lib/private/Files/Storage/Common.php(419): OC\\Files\\Storage\\DAV->stat()\\n#6 /data/vhosts/nextcloud/apps/files_external/lib/MountConfig.php(94): OC\\Files\\Storage\\Common->test()\\n#7 /data/vhosts/nextcloud/apps/files_external/lib/Controller/StoragesController.php(225): OCA\\Files_External\\MountConfig::getBackendStatus()\\n#8 /data/vhosts/nextcloud/apps/files_external/lib/Controller/StoragesController.php(275): OCA\\Files_External\\Controller\\StoragesController->updateStorageStatus()\\n#9 /data/vhosts/nextcloud/lib/private/AppFramework/Http/Dispatcher.php(205): OCA\\Files_External\\Controller\\StoragesController->show()\\n#10 /data/vhosts/nextcloud/lib/private/AppFramework/Http/Dispatcher.php(118): OC\\AppFramework\\Http\\Dispatcher->executeController()\\n#11 /data/vhosts/nextcloud/lib/private/AppFramework/App.php(153): OC\\AppFramework\\Http\\Dispatcher->dispatch()\\n#12 /data/vhosts/nextcloud/lib/private/Route/Router.php(321): OC\\AppFramework\\App::main()\\n#13 /data/vhosts/nextcloud/lib/base.php(1155): OC\\Route\\Router->match()\\n#14 /data/vhosts/nextcloud/index.php(25): OC::handleRequest()\\n#15 {main}\"}","CustomMessage":"Forbidden"}}
{"reqId":"afxKdE71nEX-nOAvuvi9qQAAANY","level":2,"time":"2026-05-07T10:16:52+02:00","remoteAddr":"192.168.2.43","user":"username","app":"no app in context","method":"GET","url":"/apps/files_external/globalstorages/19","scriptName":"/index.php","message":"External storage not available: Sabre\\HTTP\\ClientHttpException:Forbidden","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:143.0) Gecko/20100101 Firefox/143.0","version":"33.0.2.2","exception":{"Exception":"OCP\\Files\\ForbiddenException","Message":"Sabre\\HTTP\\ClientHttpException:Forbidden","Code":0,"Trace":[{"file":"/data/vhosts/nextcloud/lib/private/Files/Storage/DAV.php","line":301,"function":"convertException","class":"OC\\Files\\Storage\\DAV","type":"->"},{"file":"/data/vhosts/nextcloud/lib/private/Files/Storage/DAV.php","line":591,"function":"propfind","class":"OC\\Files\\Storage\\DAV","type":"->"},{"file":"/data/vhosts/nextcloud/lib/private/Files/Storage/DAV.php","line":650,"function":"getMetaData","class":"OC\\Files\\Storage\\DAV","type":"->"},{"file":"/data/vhosts/nextcloud/lib/private/Files/Storage/Common.php","line":419,"function":"stat","class":"OC\\Files\\Storage\\DAV","type":"->"},{"file":"/data/vhosts/nextcloud/apps/files_external/lib/MountConfig.php","line":94,"function":"test","class":"OC\\Files\\Storage\\Common","type":"->"},{"file":"/data/vhosts/nextcloud/apps/files_external/lib/Controller/StoragesController.php","line":225,"function":"getBackendStatus","class":"OCA\\Files_External\\MountConfig","type":"::","args":["*** sensitive parameters replaced ***"]},{"file":"/data/vhosts/nextcloud/apps/files_external/lib/Controller/StoragesController.php","line":275,"function":"updateStorageStatus","class":"OCA\\Files_External\\Controller\\StoragesController","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/data/vhosts/nextcloud/lib/private/AppFramework/Http/Dispatcher.php","line":205,"function":"show","class":"OCA\\Files_External\\Controller\\StoragesController","type":"->"},{"file":"/data/vhosts/nextcloud/lib/private/AppFramework/Http/Dispatcher.php","line":118,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/data/vhosts/nextcloud/lib/private/AppFramework/App.php","line":153,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/data/vhosts/nextcloud/lib/private/Route/Router.php","line":321,"function":"main","class":"OC\\AppFramework\\App","type":"::"},{"file":"/data/vhosts/nextcloud/lib/base.php","line":1155,"function":"match","class":"OC\\Route\\Router","type":"->"},{"file":"/data/vhosts/nextcloud/index.php","line":25,"function":"handleRequest","class":"OC","type":"::"}],"File":"/data/vhosts/nextcloud/lib/private/Files/Storage/DAV.php","Line":835,"message":"External storage not available: Sabre\\HTTP\\ClientHttpException:Forbidden","exception":"{\"class\":\"OCP\\Files\\ForbiddenException\",\"message\":\"Sabre\\HTTP\\ClientHttpException:Forbidden\",\"code\":0,\"file\":\"/data/vhosts/nextcloud/lib/private/Files/Storage/DAV.php:835\",\"trace\":\"#0 /data/vhosts/nextcloud/lib/private/Files/Storage/DAV.php(301): OC\\Files\\Storage\\DAV->convertException()\\n#1 /data/vhosts/nextcloud/lib/private/Files/Storage/DAV.php(591): OC\\Files\\Storage\\DAV->propfind()\\n#2 /data/vhosts/nextcloud/lib/private/Files/Storage/DAV.php(650): OC\\Files\\Storage\\DAV->getMetaData()\\n#3 /data/vhosts/nextcloud/lib/private/Files/Storage/Common.php(419): OC\\Files\\Storage\\DAV->stat()\\n#4 /data/vhosts/nextcloud/apps/files_external/lib/MountConfig.php(94): OC\\Files\\Storage\\Common->test()\\n#5 /data/vhosts/nextcloud/apps/files_external/lib/Controller/StoragesController.php(225): OCA\\Files_External\\MountConfig::getBackendStatus()\\n#6 /data/vhosts/nextcloud/apps/files_external/lib/Controller/StoragesController.php(275): OCA\\Files_External\\Controller\\StoragesController->updateStorageStatus()\\n#7 /data/vhosts/nextcloud/lib/private/AppFramework/Http/Dispatcher.php(205): OCA\\Files_External\\Controller\\StoragesController->show()\\n#8 /data/vhosts/nextcloud/lib/private/AppFramework/Http/Dispatcher.php(118): OC\\AppFramework\\Http\\Dispatcher->executeController()\\n#9 /data/vhosts/nextcloud/lib/private/AppFramework/App.php(153): OC\\AppFramework\\Http\\Dispatcher->dispatch()\\n#10 /data/vhosts/nextcloud/lib/private/Route/Router.php(321): OC\\AppFramework\\App::main()\\n#11 /data/vhosts/nextcloud/lib/base.php(1155): OC\\Route\\Router->match()\\n#12 /data/vhosts/nextcloud/index.php(25): OC::handleRequest()\\n#13 {main}\"}","CustomMessage":"External storage not available: Sabre\\HTTP\\ClientHttpException:Forbidden"}}
{"reqId":"afxKdE71nEX-nOAvuvi9qQAAANY","level":1,"time":"2026-05-07T10:16:52+02:00","remoteAddr":"192.168.2.43","user":"username","app":"lib","method":"GET","url":"/apps/files_external/globalstorages/19","scriptName":"/index.php","message":"Storage with webdav::username@webdav.example.com:5006// marked as unavailable","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:143.0) Gecko/20100101 Firefox/143.0","version":"33.0.2.2","data":{"app":"lib"}}

Additional info

Tried different configuration setting for proxyexclude:

"proxyexclude": [
            ".example.com",
            "localhost",
            "127.0.0.1",
            "webdav.example.com:5006",
            "example.com",
            "webdav.example.com"
        ]

"proxyexclude" => explode(',', getenv('no_proxy')),

"proxyexclude" =>
  array (
    0 => '.example.com',
    1 => 'localhost',
    2 => '127.0.0.1',
    3 => 'webdav.example.com:5006',
    4 => 'example.com',
    5 => 'webdav.example.com'
  ),

No difference