Can't connect to an AWS EC2 instance with cURL

Question

Can anyone tell me why can't I connect to an AWS EC2 instance?

I am using cURL to connect like this:

curl ec2-54-xxx-xx-xxx.eu-west-1.compute.amazonaws.com

But I am getting the following error:

curl: (7) couldn't connect to host

Can anyone tell me what might be wrong? I haven't previously worked with AWS.

alkar · Accepted Answer · 2014-02-06T13:06:48.103

7

This could be many things:

Review the AWS Security Groups. You probably need to add an incoming traffic exception rule for port 80 in the Security Group that's attached to your instance. For more information refer to the documentation.
If your EC2 instance is in a VPC, you need to make sure networking has been set up properly with an Internet Gateway and proper Routing Table rules. For reference, there is a nice example of a typical VPC setup here.
Additionally, if the above don't solve the issue, check the EC2 instance's OS firewall rules and that the HTTP server is running.

edited Feb 06 '14 at 13:06

answered Feb 06 '14 at 12:51

alkar

Ok I will check into that – Cayle Feb 06 '14 at 12:53
When I run `ufw status` on server it shows: `Status: inactive` – Cayle Feb 06 '14 at 12:59
Did you check the security group rules for your instance on your AWS console? – alkar Feb 06 '14 at 12:59

score 0 · Answer 2 · answered Feb 06 '14 at 12:42

0

Check for the firewall on your server which is blocking the connection. Are you able to curl any other website

answered Feb 06 '14 at 12:42

Bijendra

Yes I am able to curl to other website. How can I check firewall on the server? – Cayle Feb 06 '14 at 12:52
When I run `ufw status` on server it shows: `Status: inactive` – Cayle Feb 06 '14 at 12:58

score 0 · Answer 3 · edited May 23 '17 at 12:07

0

If you are curling an FTP URL then you may need to set the FTP Passive port range and open the range in your Security group.

edited May 23 '17 at 12:07

Community

answered Jan 11 '16 at 19:39

storm_m2138

3 Answers3