I've replicated this two or three times, so I'm guessing there's something wrong with what I'm doing.
Here are my steps:
- Launch new instance via EC2 Management console using: Ubuntu Server 13.10 - ami-ace67f9c (64-bit)
- Launch with defaults (using my existing key pair)
- The instance starts. I can SSH to it using Putty or the Mac terminal. Success!
- I reboot the instance
10 minutes later, when the instance should be back up and running, my terminal connection shows:
stead:~ stead$ ssh -v -i Dropbox/SteadCloud3.pem firstname.lastname@example.org OpenSSH_5.6p1, Op`enSSL 0.9.8y 5 Feb 2013 debug1: Reading configuration data /etc/ssh_config debug1: Applying options for * debug1: Connecting to 18.104.22.168 [22.214.171.124] port 22. debug1: connect to address 126.96.36.199 port 22: Connection refused ssh: connect to host 188.8.131.52 port 22: Connection refused stead:~ stead$
Fine, I understand that the public IP address can change, so checking the EC2 management console, I verify that it is the same. Weird. Just for fun, I try connecting with public DNS hostname: ec2-54-201-200-208.us-west-2.compute.amazonaws.com. No dice, same result.
Even using the Connect via Java SSH client built into the EC2 console, I get Connection Refused.
I checked the security groups. This instance is in group launch-wizard-4. Looking at the inbound configuration for this group, Port 22 is allowed in from 0.0.0.0/0, so that should be anywhere. I know that I'm hitting my instance and this is the right security group, because I can't ping the instance. If I enable ICMP for this security group, all of a sudden my pings go through.
I've found a few other posts around the internet with similar error messages, but most seem to be easily resolved by tweaking the firewall settings. I've tried a few of these, with no luck.
I'm guessing there's a simple EC2 step I'm missing. Thanks for any help you can give, and I'm happy to provide more information or test further!
Update - Here are my system logs from the Amazon EC2 console: http://pastebin.com/4M5pwGRt