43c09fc9-0e25-4d2a-befd-a276f27b58d0
prompter
I have 2 EC2 machines on AWS, I'm having trouble making them communicate. How could I troubleshoot it?
f9a11445-2150-41c4-ac54-ef6c6b767297
43c09fc9-0e25-4d2a-befd-a276f27b58d0
assistant
There are several possible causes for EC2 machines not communicating on AWS. I would suggest the following steps to get you started on fixing the issue:

1. Check the security group rules and network ACLs for your instances.
2. Verify that your instances have public IP addresses or Elastic IP addresses if you are connecting over the internet.
3. Ensure that your instances have the correct route tables, internet gateways, and NAT devices configured.
4. Test the network connectivity using ping, traceroute, or telnet commands.
435e6b65-9aba-4be8-a99a-1cd4f4794e90
f9a11445-2150-41c4-ac54-ef6c6b767297
prompter
How do I check the security group rules?