I just ported my blog to Microsoft Azure and I would like to say I am sorry to all linkers from my previous sub domain blog.rostacik.net, but I can’t redirect any of the old links to my current links.
The reason is simple – Azure still does not support second level sub domains in 2017.
More on the topic here : https://feedback.azure.com/forums/169385-websites/suggestions/7026845-support-double-wildcard-custom-domains
Hope this helps.