How to use/debug Debian preseed with SSL using Startssl Certs

The problem is that the wget from busybox is not compiled to support SSL. And there are no Certificate Authorities stored in d-i (so it really can't validate the server certificate).

The solution would be to add real wget into the initrd and add a trusted Certificate Authority.

@alekibango and @bahamat are correct, wget from busybox is not compiled to support SSL. But as of 2014, you can enable the --no-check-certificate parameter via the boot parameter:

debian-installer/allow_unauthenticated_ssl=true

I had to do this for Ubuntu 16.04 Xenial.

I found this information at: https://bugs.launchpad.net/ubuntu/+source/debian-installer/+bug/833994#yui_3_10_3_1_1504942623880_1343