How can I open listen ports on an Amazon EC2 instance?

Question

I'm using Amazon EC2 micro instance with Ubuntu 11.04 on it (official AMI by Canonical). I have created a new security group for this instance:

Inbound:

22 (SSH)    0.0.0.0/0
80 (HTTP)   0.0.0.0/0
443 (HTTPS) 0.0.0.0/0
3306 (MYSQL)    0.0.0.0/0
8080 (HTTP*)    0.0.0.0/0
27017   0.0.0.0/0
27018   0.0.0.0/0
27019   0.0.0.0/0
28017   0.0.0.0/0

But when I start the web server on 8080 and try to open http://ec2-ip-address:8080/ in my browser it says

Server Not Found

… with the standard Google Chrome page.

netstat -anltp | grep "LISTEN" 

says that my only port listened at is 22.

How can I open the listed ports so I can start my web projects?

EDIT: The solution has been found. All you need is to start server at 0.0.0.0 IP address, not 127.0.0.1 or localhost.

Answer 1

There are a few possibilities here. First possibility is that you haven't set that port up as a listener in Apache, you can do this by adding a line like

Listen 8080

Into you Apache configuration file.

The second possibility is that UFW is running (ubuntu Firewall), you can disable this by running

sudo ufw disable

or add ports to it via

sudo ufw allow 8080

The last possibility is IPTables is blocking it, you would need to look at

sudo iptables -L

to get a list of rules and change them from there.