Folders named "logs" do not get synced with desktop client

[Wrumm]

Steps to reproduce

1. Create a folder named "logs" in any currently synced folder
2. Put any file(s) into that new folder e.g. a create a new text file names "test.txt"
3. The error below in the sync client occurs

Expected behaviour

Folders named "logs" are synced as all other folders between the desktop client and the server

Actual behaviour

Content in a folder named "logs" is not synced with the error message on the client "server replied: Method not allowed" .

Server configuration

Operating system:
OpenSuse Leap 42.3
Docker 17.04.0-ce

Web server:
Apache

Database:
MySQL

PHP version:
7.1.2

Nextcloud version: (see Nextcloud admin page)
Nextcloud 12.0.4

Updated from an older Nextcloud/ownCloud or fresh install:
Updated over long period and several versions

Where did you install Nextcloud from:
Docker image from docker hub

Signing status:

Signing status

No errors have been found.

List of activated apps:

App list

Enabled:

• activity: 2.5.2
• bruteforcesettings: 1.0.2
• calendar: 1.5.7
• comments: 1.2.0
• contacts: 2.0.1
• dav: 1.3.0
• federatedfilesharing: 1.2.0
• federation: 1.2.0
• files: 1.7.2
• files_accesscontrol: 1.2.5
• files_external: 1.3.0
• files_pdfviewer: 1.1.1
• files_sharing: 1.4.0
• files_texteditor: 2.4.1
• files_trashbin: 1.2.0
• files_versions: 1.5.0
• files_videoplayer: 1.1.0
• firstrunwizard: 2.1
• gallery: 17.0.0
• lookup_server_connector: 1.0.0
• news: 11.0.5
• nextcloud_announcements: 1.1
• notifications: 2.0.0
• oauth2: 1.0.5
• password_policy: 1.2.2
• provisioning_api: 1.2.0
• serverinfo: 1.2.0
• sharebymail: 1.2.0
• survey_client: 1.0.0
• systemtags: 1.2.0
• tasks: 0.9.5
• theming: 1.3.0
• twofactor_backupcodes: 1.1.1
• updatenotification: 1.2.0
• workflowengine: 1.2.0
  Disabled:
• admin_audit
• encryption
• logreader
• user_external
• user_ldap

Nextcloud configuration:

Config report

"system": {
"instanceid": "REMOVED SENSITIVE VALUE",
"passwordsalt": "REMOVED SENSITIVE VALUE",
"secret": "REMOVED SENSITIVE VALUE",
"trusted_domains": [
"REMOVED SENSITIVE VALUE",
"server",
"192.168.178.25:28447",
"192.168.178.25"
],
"datadirectory": "/var/www/html/data",
"overwrite.cli.url": "/nextcloud",
"dbtype": "mysql",
"version": "12.0.4.3",
"dbname": "owncloud_db",
"dbhost": "mysql",
"dbport": "",
"dbtableprefix": "oc_",
"dbuser": "REMOVED SENSITIVE VALUE",
"dbpassword": "REMOVED SENSITIVE VALUE",
"installed": true,
"mail_from_address": "nextcloud",
"forcessl": true,
"forceSSLforSubdomains": true,
"log_type": "syslog",
"logfile": "/var/log/nextcloud.log",
"loglevel": 2,
"syslog_tag": "nextcloud",
"logdateformat": "F d, Y H:i:s",
"logtimezone": "Europe/Berlin",
"log_query": false,
"cron_log": false,
"maintenance": false,
"mail_domain": "REMOVED SENSITIVE VALUE",
"mail_smtpmode": "smtp",
"mail_smtphost": "REMOVED SENSITIVE VALUE",
"mail_smtpport": "465",
"mail_smtptimeout": 30,
"mail_smtpauth": 1,
"mail_smtpauthtype": "LOGIN",
"mail_smtpname": "REMOVED SENSITIVE VALUE",
"mail_smtppassword": "REMOVED SENSITIVE VALUE",
"mail_smtpsecure": "ssl",
"share_folder": "/Shared",
"theme": "",
"apps_paths": [
{
"path": "/var/www/html/apps",
"url": "/apps",
"writable": false
},
{
"path": "/var/www/html/custom_apps",
"url": "/custom_apps",
"writable": true
}
],
"mysql.utf8mb4": true
}

Are you using external storage, if yes which one: local/smb/sftp/...
No

Are you using encryption: no

Are you using an external user-backend, if yes which one: LDAP/ActiveDirectory/Webdav/...
No

Client configuration

Browser:
Not involved here

Operating system:
Windows 10 1703

Logs

Web server error log

Web server error log

No log entries

Nextcloud log (data/nextcloud.log)

Nextcloud log

None at this point in time
Several entries of this below but that is a known php issue:
{PHP} Narrowing occurred during type inference. Please file a bug report on bugs.php.net at /var/www/html/lib/composer/composer/ClassLoader.php#444

Dekstop client

In the Window it is shown: "server replied: Method not allowed"
Client issue created and got the feedback:
"Method not allowed" is ALWAYS a server-side issue.

owncloud/client#6247 (comment)

[brunt82]

Without a server or client log it is difficult to help here. I suppose it has nothing to do with Nextcloud but with your apache configuration... e.g. like owncloud/core#8536

[Wrumm]

Thanks, the hints helped a lot. Was a clear admin error.
I had an error in the configuration of the revers proxy.