Sophos XG - Secure log transmission

Hi Team,

I want to send logs to a external syslog server hosted on Sumologic, to make sure that data is encrypted in transit I chose secure log transmission option but on the server end I can only see messages with question marks(?) and # and some other random values. Please look at sample messages below in screenshot :

 

My Firewall settings:

Facility : DAEMON

Severity level : Information

Syslog server settings:

Protocol : TCP/UDP (tried both the protocols one by one)

Port : 6514/514 (I tried both the ports one by one)

Destination IP : Public IP 

 

 

Although I am seeing the required logs when secure log transmission option is disabled. Am i missing anything from my end?