Ietf.org certificate is expired
ietf.org
ietf.org
It's up to the site administrator to make sure their SSL is valid and configured properly. A certificate doesn't "just expire".
> If any of TypePad's site administrators are reading this, let me just take this time to say that I get it. I really, really do. I've been there. Forces are against us. SSL is a pain in the ass.