Forge have now moved their servers. I did add the new IP's couple of weeks ago but Forge can no longer see them. I've double-checked the IP's are in the security group and appear to be.
I've raised a support ticket with Forge but wondering if anyone else is having the same issue with their AWS hosted Forge managed servers?
I've mentioned that in the ticket. I will double check my ssh keys on the boxes when I get home tonight. My Linode and DO boxes are fine. That said, I had a deploy work Sun night. :-(