Cannot curl EC2 instance - Connection refused on port 80

Asked Feb 08 '19 at 18:37

Active Feb 08 '19 at 18:37

Viewed 1,934 times

So I have two instances, instance A is part of a security group sg-1 and instance B is part of another security group sg-2.

sg-1 has settings to allow all outbound traffic sg-2 has settings to allow traffic from sg-1 on port 80, 9200 and 9300:

Yet, when I SSH onto instance A and try to curl instance B on port 9200, I get an error: Failed to connect to <Instance B Private IP> port 80: Connection refused

Not sure what I am doing wrong here?

asked Feb 08 '19 at 18:37

John Mike

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You say " curl instance B on port 9200" but the error says port 80. Which is it? – Mark B Feb 08 '19 at 18:51
It's 9200 sorry, but it doesn't work for port 80 either despite having set that inbound rule (shown in screenshot). – John Mike Feb 08 '19 at 18:57
Are services actually listening on those ports on instance B? – Mark B Feb 08 '19 at 18:58
Yup, elastic search running on 9200. However nothing on 80 though – John Mike Feb 08 '19 at 19:02
If you temporarily open port 9200 to the world, can you curl to it from your own computer? If you login to instance-B, can you `curl localhost:9200`? – John Rotenstein Feb 08 '19 at 23:09

Cannot curl EC2 instance - Connection refused on port 80

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