remote logging for datadomain - can't specify port

Hello 

How do we specify the port of the remote logging host as "log host" command doesn't have any port option, in my case our nagios log server use specific port.

sysadmin@pd-dd-p1# log host add

**** Missing one or more required arguments.

Incomplete syntax "log host add", showing help:
log host add Add a remote logging host

sysadmin@pd-dd-p1#