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Security groups

Security groups establish a set of access rules for one or more servers. In practice, they are equivalent to a firewall, that is, they allow certain services to be accessible to the Internet or to only certain pre-configured IPs.

Amazon by default closes all ports and it is necessary to release the ports for your server services.

For example, to allow access to a web server such as Apache or Microsoft IIS, the following ports could be released:

  • 80 and 443 – access to the web server
  • ICMP – ping do servidor
  • 22 – SSH access (Linux only)
  • 3389 – Remote Terminal access (Windows only)
  • etc…