"MySecurityGroup" : {
      "Type" : "AWS::EC2::SecurityGroup",
      "Properties" : {
        "GroupDescription" : "SSH und HTTP-Zugang",
        "SecurityGroupIngress" : [
        { "IpProtocol" : "tcp", "FromPort" : 22, "ToPort" : 22,  
          "CidrIp" : "0.0.0.0/0" },
        { "IpProtocol" : "tcp", "FromPort" : 80, "ToPort" : 80,  
          "CidrIp" : "0.0.0.0/0" }
        ]
