For the last few days I’ve been reading on this forum and the Collabora integration support, but I am completely unable to fix my issues.
I’ve been working with a home setup of Nextcloud and Collabora office for years without problems (www.instanceA.com for this example). Recently I’ve decided to set up a second Nextcloud instance in my PC (nextcloud.web.com for this example) but wanted to reuse the same CODE instance (office.instanceA.com here).
I’ve set up the Collabora service in docker-compse.yml file with the following options to support both URLs and handle reverse proxy:
- DONT_GEN_SSL_CERT=1
- "extra_params=--o:ssl.enable=false --o:ssl.termination=true"
- aliasgroup1=https://www.instanceA.com:443,https://www\\.instanceA\\.com:443
- aliasgroup2=https://http://nextcloud.web.com:443,https://nextcloud\\.web\\.com:443
On top of that, I’ve set up the office connection in the second instance through occ, getting all green checks:
✓ Set callback url to https://nextcloud.web.com
Checking configuration
🛈 Configured WOPI URL: https://office.instanceA.com
🛈 Configured public WOPI URL: https://office.instanceA.com
🛈 Configured callback URL: https://nextcloud.web.com
✓ Fetched /hosting/discovery endpoint
✓ Valid mimetype response
✓ Valid capabilities entry
✓ Fetched /hosting/capabilities endpoint
✓ Detected WOPI server: Collabora Online Development Edition 25.04.3.2
Collabora URL (used for Nextcloud to contact the Collabora server):
https://office.instanceA.com
Collabora public URL (used in the browser to open Collabora):
https://office.instanceA.com
Callback URL (used by Collabora to connect back to Nextcloud):
https://nextcloud.web.com
Current setup and versions
- Nextcloud Server version 31.0.0 on both instances
- Docker compose with
nextcloud:31.0.0-fpm-alpine - Web server and version
jwilder/nginx-proxyfor reverse proxy
Summary of the issue you are facing:
After the explained setup, I am able to correctly open files as always through my original instance, but not through the new one, the error I get reads:
Failed to establish socket connection or socket connection closed unexpectedly. The reverse proxy might be misconfigured, please contact the administrator. For more info on proxy configuration please checkout https://sdk.collaboraonline.com/docs/installation/Proxy_settings.html
Log entries
Collabora
The only relevant logs I could see, where I guess the problem lies, but I’ve not been able to fix are in the collabora instance and as follows:
app-collabora | wsd-00001-00022 2025-07-13 15:55:18.507492 +0000 [ websrv_poll ] ERR Failed to fetch preset uri[http://nextcloud.web.com/apps/richdocuments/settings/systemconfig/hYlqctsIiYZljKx2jjpSEO2QdHBXVA8F/xcu/documentView.xcu] with status[Moved Permanently]| wsd/DocumentBroker.cpp:1952
app-collabora | wsd-00001-00022 2025-07-13 15:55:18.507726 +0000 [ websrv_poll ] ERR #-1: Failed to install config [shared-https_nextcloud.web.com/index.php/apps/richdocuments/wopi/settings-686f9bc5a58f3686cf93905229]| wsd/RequestVettingStation.cpp:195
app-collabora | wsd-00001-00022 2025-07-13 15:55:21.804260 +0000 [ websrv_poll ] ERR Failed to fetch preset uri[http://nextcloud.web.com/apps/richdocuments/settings/systemconfig/mw82yBmjypi4QH5RxswJmnd5Jo5EjwVg/xcu/documentView.xcu] with status[Moved Permanently]| wsd/DocumentBroker.cpp:1952
app-collabora | wsd-00001-00022 2025-07-13 15:55:21.804303 +0000 [ websrv_poll ] ERR #-1: Failed to install config [shared-https_nextcloud.web.com/index.php/apps/richdocuments/wopi/settings-686f9bc5a58f3686cf93905229]| wsd/RequestVettingStation.cpp:195
Looks like it tries to connect to the new nextcloud instance through http instead of https and gets a 301 response, which interprets as invalid and then the rest of the process doesn’t work correctly. At some point I did even get to see the office GUI, but ended up showing the same error after a moment.
For reference this is my config.php in the new instance:
server app-nextcloud:9000;
#server unix:/var/run/php/php7.4-fpm.sock;
}
# server {
# listen 80;
# listen [::]:80;
# server_name cloud.example.com;
# # enforce https
# return 301 https://$server_name:443$request_uri;
# }
server {
listen 80;
listen [::]:80;
server_name nextcloud.web.com
# Add headers to serve security related headers
# Before enabling Strict-Transport-Security headers please read into this
# topic first.
# add_header Strict-Transport-Security "max-age=15768000; includeSubDomains; preload;" always;
#
# WARNING: Only add the preload option once you read about
# the consequences in https://hstspreload.org/. This option
# will add the domain to a hardcoded list that is shipped
# in all major browsers and getting removed from this list
# could take several months.
add_header Referrer-Policy "no-referrer" always;
add_header X-Content-Type-Options "nosniff" always;
add_header X-Download-Options "noopen" always;
add_header X-Frame-Options "SAMEORIGIN" always;
add_header X-Permitted-Cross-Domain-Policies "none" always;
add_header X-Robots-Tag "none" always;
add_header X-XSS-Protection "1; mode=block" always;
# Remove X-Powered-By, which is an information leak
fastcgi_hide_header X-Powered-By;
# Path to the root of your installation
root /var/www/nextcloud;
location = /robots.txt {
allow all;
log_not_found off;
access_log off;
}
# The following 2 rules are only needed for the user_webfinger app.
# Uncomment it if you're planning to use this app.
#rewrite ^/.well-known/host-meta /public.php?service=host-meta last;
#rewrite ^/.well-known/host-meta.json /public.php?service=host-meta-json last;
# The following rule is only needed for the Social app.
# Uncomment it if you're planning to use this app.
#rewrite ^/.well-known/webfinger /public.php?service=webfinger last;
location = /.well-known/carddav {
return 301 $scheme://$host:$server_port/remote.php/dav;
}
location = /.well-known/caldav {
return 301 $scheme://$host:$server_port/remote.php/dav;
}
# set max upload size
client_max_body_size 512M;
fastcgi_buffers 64 4K;
# Enable gzip but do not remove ETag headers
gzip on;
gzip_vary on;
gzip_comp_level 4;
gzip_min_length 256;
gzip_proxied expired no-cache no-store private no_last_modified no_etag auth;
gzip_types application/atom+xml application/javascript application/json application/ld+json application/manifest+json application/rss+xml application/vnd.geo+json application/vnd.ms-fontobject application/x-font-ttf application/x-web-app-manifest+json application/xhtml+xml application/xml font/opentype image/bmp image/svg+xml image/x-icon text/cache-manifest text/css text/plain text/vcard text/vnd.rim.location.xloc text/vtt text/x-component text/x-cross-domain-policy;
# Uncomment if your server is build with the ngx_pagespeed module
# This module is currently not supported.
#pagespeed off;
location / {
rewrite ^ /index.php;
}
location ~ ^\/(?:build|tests|config|lib|3rdparty|templates|data)\/ {
deny all;
}
location ~ ^\/(?:\.|autotest|occ|issue|indie|db_|console) {
deny all;
}
location ~ ^\/(?:index|remote|public|cron|core\/ajax\/update|status|ocs\/v[12]|updater\/.+|oc[ms]-provider\/.+|.+\/richdocumentscode\/proxy)\.php(?:$|\/) {
fastcgi_split_path_info ^(.+?\.php)(\/.*|)$;
set $path_info $fastcgi_path_info;
try_files $fastcgi_script_name =404;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_param PATH_INFO $path_info;
fastcgi_param HTTPS on;
# Avoid sending the security headers twice
fastcgi_param modHeadersAvailable true;
# Enable pretty urls
fastcgi_param front_controller_active true;
fastcgi_pass php-handler;
fastcgi_intercept_errors on;
fastcgi_request_buffering off;
}
location ~ ^\/(?:updater|oc[ms]-provider)(?:$|\/) {
try_files $uri/ =404;
index index.php;
}
# Adding the cache control header for js, css and map files
# Make sure it is BELOW the PHP block
location ~ \.(?:css|js|woff2?|svg|gif|map)$ {
try_files $uri /index.php$request_uri;
add_header Cache-Control "public, max-age=15778463";
# Add headers to serve security related headers (It is intended to
# have those duplicated to the ones above)
# Before enabling Strict-Transport-Security headers please read into
# this topic first.
#add_header Strict-Transport-Security "max-age=15768000; includeSubDomains; preload;" always;
#
# WARNING: Only add the preload option once you read about
# the consequences in https://hstspreload.org/. This option
# will add the domain to a hardcoded list that is shipped
# in all major browsers and getting removed from this list
# could take several months.
add_header Referrer-Policy "no-referrer" always;
add_header X-Content-Type-Options "nosniff" always;
add_header X-Download-Options "noopen" always;
add_header X-Frame-Options "SAMEORIGIN" always;
add_header X-Permitted-Cross-Domain-Policies "none" always;
add_header X-Robots-Tag "none" always;
add_header X-XSS-Protection "1; mode=block" always;
# Optional: Don't log access to assets
access_log off;
}
location ~ \.(?:png|html|ttf|ico|jpg|jpeg|bcmap|mp4|webm)$ {
try_files $uri /index.php$request_uri;
# Optional: Don't log access to other assets
access_log off;
}
}
Thanks for your time and let me know if you need any more information, I don’t see how else to get this to work.
