thanks for the answer, the local ports on the server are open, but I'm behind a proxy server; then I configured proxy settings but I still can not connect to the cloud, the error I'm getting is:
10-25-2017 09:07:39.281 -0500 WARN HttpPubSubConnection - Unable to parse message from PubSubSvr:
10-25-2017 09:07:39.281 -0500 INFO HttpPubSubConnection - Could not obtain connection, will retry after=41.107 seconds.
10-25-2017 09:07:48.813 -0500 ERROR TcpOutputProc - Processing server from outputs.conf: can't resolve a valid IP address for host="input-xxxxxxx.cloud.splunk.com"
10-25-2017 09:07:48.813 -0500 ERROR TcpOutputProc - Processing server from outputs.conf: can't resolve a valid IP address for host="xxxxx.cloud.splunk.com"
I do not know if it is the best option to forward events or there is another way to splunk universal forwarder behind the proxy server.
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