Support intro
Sorry to hear you’re facing problems 
help.nextcloud.com is for home/non-enterprise users. If you’re running a business, paid support can be accessed via portal.nextcloud.com where we can ensure your business keeps running smoothly.
In order to help you as quickly as possible, before clicking Create Topic please provide as much of the below as you can. Feel free to use a pastebin service for logs, otherwise either indent short log examples with four spaces:
example
Or for longer, use three backticks above and below the code snippet:
longer
example
here
Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can 
Nextcloud version (eg, 20.0.5): 22.0.0
Operating system and version (eg, Ubuntu 20.04): Debian 10
Apache or nginx version (eg, Apache 2.4.25): Apache/2.4.38 (Debian)
PHP version (eg, 7.4): PHP 7.3.29-1
The issue you are facing:
Is this the first time you’ve seen this error? (Y/N): N
Steps to replicate it:
- Install Nextcloud
- Configure Nginx Proxy Manager on same or different device
- Try to log in incorrectly
The output of your Nextcloud log in Admin > Logging:
{"reqId":"3lkvvhxsutwMmDdBJjAV","level":2,"time":"2021-07-26T15:09:54+00:00","remoteAddr":"192.168.0.136","user":"--","app":"no app in context","method":"POST","url":"/login","message":"Login failed: asdasdad (Remote IP: 192.168.0.136)","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.107 Safari/537.36","version":"22.0.0.11"}
{"reqId":"fTihwqjBYczCB2B1HTlE","level":2,"time":"2021-07-26T15:11:16+00:00","remoteAddr":"192.168.0.136","user":"--","app":"no app in context","method":"POST","url":"/login","message":"Login failed: asdasdasd (Remote IP: 192.168.0.136)","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.107 Safari/537.36","version":"22.0.0.11"}
{"reqId":"J5qpuSN9dfv5CzLHpiOd","level":2,"time":"2021-07-26T15:11:27+00:00","remoteAddr":"192.168.0.136","user":"--","app":"no app in context","method":"POST","url":"/login","message":"Login failed: asdasdasd\u00e4\u00e4\u00e4 (Remote IP: 192.168.0.136)","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.107 Safari/537.36","version":"22.0.0.11"}
{"reqId":"xB1ckbYGmpnvZ8VaUYi3","level":2,"time":"2021-07-26T15:11:57+00:00","remoteAddr":"192.168.0.136","user":"--","app":"no app in context","method":"POST","url":"/login","message":"Login failed: asdasdasd\u00e4\u00e4\u00e4 (Remote IP: 192.168.0.136)","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.107 Safari/537.36","version":"22.0.0.11"}
{"reqId":"aOxOg4pRqntbSg5WBWXX","level":2,"time":"2021-07-26T15:13:15+00:00","remoteAddr":"192.168.0.136","user":"--","app":"no app in context","method":"POST","url":"/login","message":"Login failed: asdasdasd\u00e4\u00e4\u00e4 (Remote IP: 192.168.0.136)","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.107 Safari/537.36","version":"22.0.0.11"}
{"reqId":"GbJL14ZwvP1LvJptDpi1","level":2,"time":"2021-07-26T15:13:18+00:00","remoteAddr":"192.168.0.136","user":"--","app":"no app in context","method":"POST","url":"/login","message":"Login failed: asdasdasd\u00e4\u00e4\u00e4 (Remote IP: 192.168.0.136)","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.107 Safari/537.36","version":"22.0.0.11"}
{"reqId":"CBR3DMVbm9ICxMn3sXci","level":2,"time":"2021-07-26T15:13:26+00:00","remoteAddr":"192.168.0.136","user":"--","app":"no app in context","method":"POST","url":"/login","message":"Login failed: asdasdasd\u00e4\u00e4\u00e4erwerwr (Remote IP: 192.168.0.136)","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.107 Safari/537.36","version":"22.0.0.11"}
{"reqId":"EQNsclt7WAwr1klsN8Qp","level":2,"time":"2021-07-26T15:13:43+00:00","remoteAddr":"192.168.0.136","user":"--","app":"no app in context","method":"POST","url":"/login","message":"Login failed: asdasdasd\u00e4\u00e4\u00e4erwerwrasdasd (Remote IP: 192.168.0.136)","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.107 Safari/537.36","version":"22.0.0.11"}
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
<?php
$CONFIG = array (
'instanceid' => 'ocnkpza26wwr',
'passwordsalt' => '[REDACTED]',
'secret' => '[REDACTED]',
'trusted_domains' =>
array (
0 => '192.168.0.136',
1 => 'nextcloud.[REDACTED].cc',
2 => '192.168.0.135',
),
'trusted_proxies' => ['172.18.0.3', '192.168.0.0/24', '192.168.0.136',],
'auto_logout' => false,
'datadirectory' => '/drives/raid1/NextCloud',
'dbtype' => 'mysql',
'version' => '22.0.0.11',
'overwrite.cli.url' => 'https://nextcloud.[REDACTED].cc',
'dbname' => 'nextclouddb',
'overwriteprotocol' => 'https',
'dbhost' => 'localhost',
'forwarded_for_headers' => ['HTTP_X_FORWARDED', 'HTTP_FORWARDED_FOR', 'X-Forwarded-For'],
'overwritecondaddr' => '',
'overwritewebroot' => '',
'dbport' => '',
'overwritehost' => '',
'dbtableprefix' => 'oc_',
'mysql.utf8mb4' => true,
'dbuser' => 'nextclouduser',
'htaccess.RewriteBase' => '/',
'dbpassword' => '[REDACTED]',
'installed' => true,
'default_phone_region' => 'FI',
'apc.enable_cli' => '1',
'memcache.local' => '\\OC\\Memcache\\APCu',
'memcache.locking' => '\\OC\\Memcache\\Redis',
'memcache.distributed' => '\\OC\\Memcache\\Redis',
'redis' =>
array (
'host' => '/var/run/redis/redis-server.sock',
'port' => 0,
'timeout' => 0,
'password' => '',
'dbindex' => 0,
),
'app_install_overwrite' =>
array (
0 => 'camerarawpreviews',
),
'maintenance' => false,
);
The output of your Apache/nginx/system log in /var/log/____:
Not necessary
So, I am running my Nextcloud instance on server 1, which is located at 192.168.0.135 (on port 32531) and my Nginx Reverse Proxy (NPM for short onward) on server 2, which is located at 192.168.0.136.
No matter what I try, I cannot get Nextcloud to see the correct ip of the end user on failed login attempt. Only the proxy ip. I have added the IP of NPM to trusted_proxies and added ‘forwarded_for_headers’ -line as advised. There is multiple entries on the trusted_proxies -line, because I was testing EVERYTHING. First I had NPM on the same machine, and then the IP was 172.18.0.3 but I moved it to a separate machine. My NPM entry is as follows:
Domain names: Nextcloud.[REDACTED].cc, Scheme: HTTP, Forward Hostname/IP: 192.168.0.135, Forward Port: 32531.
Websocket support and Block Common Exploits are turned on but haven't made a difference whilst off. SSL is forced with HTTP/2 support.
I tried adding this to the NPM advanced configuration, but having the first line breaks NPM and the proxy host goes offline.
proxy_set_header Host $host;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
Even if I have the others, still nothing.
The instance does work very well, but its a bit unusable, when brute-force protection blocks EVERYONE from signing in if some 3rd party tried to log in.