can t reach cygnus instance from orion context broker

I used Cygnus 0.8.2 on fiware image CentOS-7-x64, to subscribe to Orion context broker. This is the code I've used.

(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) <
              
I received the following 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 can't really figure out why the Cygnus instance is not reached under the associated public IP address. In fact, I can't even ping Cygnus machine instance from Orion instance. Any clue on what I might have missed?