I've had my website (an EC2 instance) running for a year now and everything was fine until this morning when I lost access to it and its associated database (an AWS RDS database instance). I can't access my website via the browser or SSH into either instance (the EC2 or RDS).
On the other hand, I can SSH into a different EC2 I have but oddly I can't access that website (a different domain name) from the browser either.
All the global AWS monitors websites and my own AWS dashboard monitors show everything is fine so I'm really stumped by this abruptly patchy access.
I'm using AWS Route53 for DNS but since this is also affecting my database, I don't think DNS is the problem.
Any thoughts on how to debug this?
p.s. I know this is not an billing issue b/c there have been no changes in billing.