couchjs | Drop-in replacement JavaScript engine for Apache CouchDB | SQL Database library

Once you have enabled the erlang query server you need to created your design docs setting the language as erlang.

There are only two things required to make it visible outside: you should bind on external ip address (shown as Public IP in EC2 instance properties) and open it on firewall. So it just must be between these two.

I see you changed the bind address to 0.0.0.0. This should address binding step by binding on all interfaces.

But you still connect using localhost using ssh. You're not checking the same thing then. Try to use machine ip address instead of 127.0.0.1 when trying to test with curl. It should be the one shown as as Public IP in EC2 instance properties. But if in doubt, use ifconfig -a to figure out what ip addresses you have. You can also check on what interfaces it actually bound by running following command netstat -a -n | grep 5984. It must show 0.0.0.0:5984 (or *:5984) as LISTEN (not 127.0.0.1:5984). Otherwise it's not binding on correct port and you should check CouchDb configuration file to see why. It also pays to check that CouchDB is really using the config you're editing.

On the firewall side - check that you have open it on the correct security group. It must be the one shown in "Security groups" property of your EC2 instance and the rule you open must be inbound.

Some times instance firewall jumps in and cause troubles too. But I only had this issue on Windows machines. I believe it is disabled on AWS Linux machines (at least I never needed to adjust anything there - Security group rules were always enough).

If this still doesn't work. I can only suggest trying to test it with telnet whether it connects at all. As browsers sometimes misreport exact stage to make it simpler for an average user. Connecting with telnet is a more low level test, but keep in mind you need to separate port with a space for telnet instead of a colon, e.g. telnet 1.2.3.4 5984 where 1.2.3.4 is server's ip address.