Nginx fastcgi latest 6

Assuming you added the lines to the correct files:

seahub_settings.py FILE_SERVER_ROOT = ‘https://your-dyndns-address/seafhttp
ccnet.conf: SERVICE_URL = https://your-dyndns-address

then the issue might be that you are not using https but http in your URLs. Please change this in your URLs before you provide the debug error messages, which @daniel.pan asked for.