If you want to upload ISO more than 2Gb you should change limit in 3 places:
- on page /settings/edit#system parameter "Max upload size" (set actual limit);
- in file /onapp/onapp-cp.conf set "MAX_UPLOAD_SIZE=0" (twice);
- in file /etc/httpd/conf.d/onapp.conf set"LimitRequestBody 0" (it is needed for make sure that 'LimitRequestBody' won't be overwritten during next update).
Two last parameters related to known Apache2 (httpd) limitation:
This directive specifies the number of bytes from 0 (meaning unlimited) to 2147483647 (2GB) that are allowed in a request body.
Restart of httpd is required for apply these changes.