Problem: can't communicate with instance

Use ping from a client (not the CLC). Can you ping it?

Yes:
Check the open ports on security groups and retry connection using SSH or HTTP. Can you connect now?
1. Yes. Okay, then. You're work is done.
2. No:
  Try the same procedure as if you can't ping it up front.
No:
Is your cloud running in Edge networking mode?
- Yes:
  Run euca-describe-nodes. Is your instance there?
  - Yes:
    Ping the instance's public IP from the NC. Can you ping it? Check network between client and NC (this indicates that the problem is not the Eucalyptus network).
  - No:
    Check eucanetd.log and IP tables rules. Make sure the IP address has visible public IPs and that the IP tables have expected ports opened.
- No, it is not in Edge networking mode:
  1. Run euca-describe-instances
  2. Note the AZ name.
  3. Run euca-describe-AZ verbose.
  4. Note the IP for the CC.
  5. Ping the instance's private IP from the CC.
    Are there error messages?
    - Yes:
      Check the network connection between the client and the CC.
    - No:
      Check eucanetd.log and the IP tables rules. Make sure the IP address has visible public IPs and that the IP tables have expected ports opened.