As far as I've read a lot of browser will end the support for SHA1 certifcates next year.
Is there a official document / warning which products are affected and how to generate SHA2 certificates.
I.e. how could I change the factory installed self signed certificate on ExtremeWireless.
I know I'd generate a cert signing request and generate one from my CA but what about small installations without a CA - how could I generate a new self signed cert on the controller with SHA2.