Nextcloud behind apache reverse proxy; Webdav problem

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Nextcloud version :16.0.1
Operating system and version: Ubuntu server 18.04
Apache or nginx version: 2.4.29
PHP version: 7.2

The issue you are facing:
I have two identical virtual systems. One with nextcloud installed and the other one is an apache reverse proxy. On the nextcloud system under Settings->Overview->Security & setup warnings there are no problems. But when I access it through the apache reverse proxy then it tells me:

“Your web server is not properly set up to resolve “/.well-known/caldav”. Further information can be found in the [documentation]
Your web server is not properly set up to resolve “/.well-known/carddav”. Further information can be found in the [documentation]”

Reverse proxy config:

#       Redirect 301 /.well-known/carddav http://192.168.178.13/cloud/remote.php/dav
#       Redirect 301 /.well-known/caldav http://192.168.178.13/cloud/remote.php/dav
#       <Location /.well-known/carddav>
#            ProxyPass http://192.168.178.13/cloud/remote.php/dav
#            ProxyPassReverse http://192.168.178.13/cloud/remote.php/dav
#       </Location>

        <Location /cloud>
            ProxyPass http://192.168.178.13/cloud
            ProxyPassReverse http://192.168.178.13/cloud
#           RewriteEngine On
#           RewriteRule ^/\.well-known/carddav https://%{192.168.178.13}/remote.php/dav/ [R=301,L]
#           RewriteRule ^/\.well-known/caldav https://%{192.168.178.13}/remote.php/dav/ [R=301,L]
            Redirect 301 /.well-known/carddav /remote.php/dav
            Redirect 301 /.well-known/caldav /remote.php/dav
#           ProxyPassReverseCookiePath /cloud /cloud
        </Location>

Everything except the webdav part works. I tried redirecting it inside the location. I tried it outside the location. I tried it with own locations. Nothing worked :frowning:

I am relativly new to apache and a bit lost…
I did not find anything about running nextcloud behind a proxy in the documentation and google didn’t help me either.

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

Steps to replicate it:

  1. Install Nextcloud on one system
  2. Install a reverse proxy on a second system
  3. Access the nextcloud instance through the proxy

The output of your Nextcloud log in Admin > Logging:

No entries for the last 3 days. Problem occured after last entry.

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

<?php
$CONFIG = array (
  'instanceid' => '',
  'passwordsalt' => '',
  'secret' => '',
  'trusted_domains' =>
  array (
    0 => '192.168.178.13',
    1 => '192.168.178.14',
  ),
  'trusted_proxies' => ['192.168.178.14'],
  'datadirectory' => '/var/www/html/cloud/data',
  'dbtype' => 'pgsql',
  'version' => '16.0.1.1',
  'overwrite.cli.url' => 'http://192.168.178.13/cloud',
  'dbname' => 'nextcloud',
  'dbhost' => 'localhost',
  'dbport' => '',
  'dbtableprefix' => 'oc_',
  'dbuser' => 'nextclouduser',
  'dbpassword' => 'nextcloud',
  'installed' => true,
  'memcache.local' => '\OC\Memcache\APCu',
  'overwritehost' => '192.168.178.13',
);

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

No entries for the last 3 days. Problem occured after last entry.

I am thankful for any help. :slight_smile: