Site Temporarily Unavailable

all my domains can not open , like

Have you loged into the panel? Specifically looking for a server specific status update, like they are moving you to a different server?

“bad_http_conf” is a dreamhost specific error message, it can pop up for alot of reasons, but in your case I’m guessing that since you are getting it on so many domains I’m guessing that your server is being migrated or something.

Your sites were migrated to a new server last week. You should have received an email with details on the changes you need to make to your domains’ DNS.