Remote webdav connection from synology dsm to nextcloud

Nextcloud version (eg, 12.0.2): 13.0.7
Operating system and version (eg, Ubuntu 17.04): Debian Jessie
Apache or nginx version (eg, Apache 2.4.25): Apache 2.4.10
PHP version (eg, 7.1): 5.6.38

The issue you are facing:

I try to connect from synology dsm filemanager to nextcloud via webdavs and got the following error message from synology: “Connection refused by server”. I do not have any issues if i connect via nautilus filemanager or any other client via webdav.

Is this the first time you’ve seen this error? (Y/N): Yes

Steps to replicate it:

  1. Open remote connection setup wizard in dsm
  2. Input all necessary webdav login data from your nextcloud
  3. Click Apply

The output of your Nextcloud log in Admin > Logging:

{"reqId":"of6xr4zpbsab60ugFd8K","level":1,"time":"2018-11-03T13:02:06+00:00","remoteAddr":"xxxxx:cfc","user":"--","app":"admin_audit","method":"GET","url":"\/\/remote.php\/webdav\/","message":"Login attempt: \"USER\"","userAgent":"--","version":"13.0.7.2"}
{"reqId":"of6xr4zpbsab60ugFd8K","level":1,"time":"2018-11-03T13:02:07+00:00","remoteAddr":"xxxxx::cfc","user":"USER","app":"admin_audit","method":"GET","url":"\/\/remote.php\/webdav\/","message":"Login successful: \"USER\"","userAgent":"--","version":"13.0.7.2"}
{"reqId":"5ikS5Swnfyn6YRUUPk9L","level":0,"time":"2018-11-03T13:02:08+00:00","remoteAddr":"xxxxx::cfc","user":"--","app":"webdav","method":"PROPFIND","url":"\/\/remote.php\/webdav","message":"Exception: {\"Exception\":\"Sabre\\\\DAV\\\\Exception\\\\NotAuthenticated\",\"Message\":\"No 'Authorization: Basic' header found. Either the client didn't send one, or the server is misconfigured, No 'Authorization: Bearer' header found. Either the client didn't send one, or the server is mis-configured\",\"Code\":0,\"Trace\":\"#0 [internal function]: Sabre\\\\DAV\\\\Auth\\\\Plugin->beforeMethod(Object(Sabre\\\\HTTP\\\\Request), Object(Sabre\\\\HTTP\\\\Response))\\n#1 \\\/var\\\/www\\\/nextcloud\\\/3rdparty\\\/sabre\\\/event\\\/lib\\\/EventEmitterTrait.php(105): call_user_func_array(Array, Array)\\n#2 \\\/var\\\/www\\\/nextcloud\\\/3rdparty\\\/sabre\\\/dav\\\/lib\\\/DAV\\\/Server.php(466): Sabre\\\\Event\\\\EventEmitter->emit('beforeMethod', Array)\\n#3 \\\/var\\\/www\\\/nextcloud\\\/3rdparty\\\/sabre\\\/dav\\\/lib\\\/DAV\\\/Server.php(254): Sabre\\\\DAV\\\\Server->invokeMethod(Object(Sabre\\\\HTTP\\\\Request), Object(Sabre\\\\HTTP\\\\Response))\\n#4 \\\/var\\\/www\\\/nextcloud\\\/apps\\\/dav\\\/appinfo\\\/v1\\\/webdav.php(80): Sabre\\\\DAV\\\\Server->exec()\\n#5 \\\/var\\\/www\\\/nextcloud\\\/remote.php(164): require_once('\\\/var\\\/www\\\/nextcl...')\\n#6 {main}\",\"File\":\"\\\/var\\\/www\\\/nextcloud\\\/3rdparty\\\/sabre\\\/dav\\\/lib\\\/DAV\\\/Auth\\\/Plugin.php\",\"Line\":168}","userAgent":"gvfs\/1.21.1","version":"13.0.7.2"}
{"reqId":"OrWK1nUfv7t0z4Z3a73t","level":1,"time":"2018-11-03T13:02:08+00:00","remoteAddr":"xxxxx::cfc","user":"--","app":"admin_audit","method":"PROPFIND","url":"\/\/remote.php\/webdav","message":"Login attempt: \"USER\"","userAgent":"gvfs\/1.21.1","version":"13.0.7.2"}
{"reqId":"OrWK1nUfv7t0z4Z3a73t","level":1,"time":"2018-11-03T13:02:08+00:00","remoteAddr":"xxxxx::cfc","user":"USER","app":"admin_audit","method":"PROPFIND","url":"\/\/remote.php\/webdav","message":"Login successful: \"USER\"","userAgent":"gvfs\/1.21.1","version":"13.0.7.2"}

The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):

$CONFIG = array (
  'instanceid' => 'xxxx',
  'passwordsalt' => 'xxxxx',
  'secret' => 'xxxxx',
  'trusted_domains' => 
  array (
    0 => 'localhost',
    1 => 'domain.tlfd',
  ),
  'datadirectory' => '/var/nextcloud-data',
  'overwrite.cli.url' => 'https://domain.tld',
  'dbtype' => 'mysql',
  'version' => '13.0.7.2',
  'dbname' => 'nextcloud',
  'dbhost' => 'localhost',
  'dbtableprefix' => 'oc_',
  'dbuser' => 'oc_xxxx',
  'dbpassword' => 'xxxxx',
  'logtimezone' => 'UTC',
  'installed' => true,
  'memcache.local' => '\\OC\\Memcache\\APCu',
  'mail_smtpmode' => 'sendmail',
  'mail_from_address' => 'cloud',
  'mail_domain' => 'xxxxx',
  'defaultapp' => 'calendar',
  'logfile' => '/var/nextcloud-data/nextcloud.log',
  'loglevel' => 2,
  'maintenance' => false,
  'updater.release.channel' => 'stable',
  'theme' => '',
  'appstoreenabled' => true,
);

The output of your Apache/nginx/system log in /var/log/____:


XXX::cfc - USER [03/Nov/2018:14:12:35 +0100] "GET //remote.php/webdav/ HTTP/1.1" 200 5215 "-" "-"
XXX:e478 - - [03/Nov/2018:14:12:36 +0100] "GET /remote.php/webdav/ HTTP/1.1" 401 1834 "-" "-"
XXXe478 - - [03/Nov/2018:14:12:29 +0100] "GET /index.php/apps/logreader/poll?lastReqId=CyrZRm3eilkNCjI9mvaX HTTP/1.1" 200 3476 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0"
2a00:61e0:4046:5500:6c5a:f63c:8a94:e478 - USER [03/Nov/2018:14:12:36 +0100] "GET /remote.php/webdav/ HTTP/1.1" 200 1557 "-" "-"
XXX::cfc - - [03/Nov/2018:14:12:37 +0100] "OPTIONS //remote.php/webdav HTTP/1.1" 200 5289 "-" "gvfs/1.21.1"
XXX::cfc - - [03/Nov/2018:14:12:37 +0100] "PROPFIND //remote.php/webdav HTTP/1.1" 401 1166 "-" "gvfs/1.21.1"
XXX::cfc - USER [03/Nov/2018:14:12:37 +0100] "PROPFIND //remote.php/webdav HTTP/1.1" 207 1374 "-" "gvfs/1.21.1"
XXX:e478 - - [03/Nov/2018:14:12:38 +0100] "GET /remote.php/webdav/ HTTP/1.1" 401 1834 "-" "-"
XXX:e478 - USER [03/Nov/2018:14:12:38 +0100] "GET /remote.php/webdav/ HTTP/1.1" 200 1559 "-" "-"
XXX:e478 - - [03/Nov/2018:14:12:36 +0100] "GET /index.php/apps/logreader/poll?lastReqId=BPTTowdAO3tL2zOv2CDM HTTP/1.1" 200 5419 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0"
XXX:e478 - - [03/Nov/2018:14:12:39 +0100] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 200 952 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0"