cygnus instance not reached from orion context broker

I have installed cygnus 0.8.2 on fiware image CentOS-7-x64, I subscribed to orion context broker using:

(curl 193.48.247.246:1026/v1/subscribeContext -s -S --header 'Content-Type: application/json' --header 'Accept: application/json' --header 'Fiware-Service: egmmqtt' --header 'Fiware-ServicePath: /egmmqttpath' -d @- | python -mjson.tool) <<EOF
{
    "entities": [
        {
            "type": "sensors",
            "isPattern": "false",
            "id": "sensors:switch2A"
        }
    ],
    "attributes": [
        "switch2A"
    ],
    "reference": "http://193.48.247.223:5050/notify",
    "duration": "P1M",
    "notifyConditions": [
        {
            "type": "ONCHANGE",
            "condValues": [
                "switch2A"
            ]
        }
    ],
    "throttling": "PT1S"
}
EOF

No notification has reached cygnus and I got this error on orionContextBroker logs:

time=2015-10-06T17:43:37.898CEST | lvl=WARNING | trans=1443447780-161-00000000423 | function=sendHttpSocket | comp=Orion | msg=clientSocketHttp.cpp[358]: Notification failure for 193.48.247.223:5050 (curl_easy_perform failed: Couldn't connect to server)

I dont know why the cygnus instance is not reached under the associated public IP adress. In fact I can't ping cygnus machine instance from Orion instance. Any ideas of what I have missed? thanks!

Solution

In the security rules of cygnus instance the port on which cygnus is listenning (in my case 5050) has to be open so orion can reach cygnus instance.