Looks like the proxy settings are basic @RalfEGroupware - can you please confirm (have not yet tested all function - just the logon.
Settings are as follow (on the dedicated revers-proxy):
VirtuelHost Datei ergänzen um den Proxy Teil:
sudo nano /etc/apache2/sites-available/test.mydomain.selfhost.me-le-ssl.conf
<VirtualHost *:443>
ServerName test.mydomain.selfhost.me
DocumentRoot /var/www/test.mydomain.selfhost.me-sslProxyPreserveHost On SSLProxyEngine On SSLProxyVerify none SSLProxyCheckPeerName Off SSLProxyCheckPeerExpire Off ProxyPass /egroupware/ https://192.168.56.113/egroupware/ ProxyPassReverse /egroupware/ https://192.168.56.113/egroupware/ Include /etc/letsencrypt/options-ssl-apache.conf SSLCertificateFile /etc/letsencrypt/live/mydomain.selfhost.me/fullchain.pem SSLCertificateKeyFile /etc/letsencrypt/live/mydomain.selfhost.me/privkey.pem </VirtualHost> </IfModule>
Aktivieren der Konfiguration:
sudo apache2ctl configtest
sudo systemctl restart apache2Browser Test:
https://test.mydomain.selfhost.me/egroupware/