SAPROUTER - how to check if SAP is logging in ?

Hi,

after i have created a message and opened connection for SAP in Marketplace, while waiting for their reply on the solution, is there any log i can check to verify that they have connected or are connecting to my system via saprouter ?

i know a way to check is to check the logon status of the ID we provided to them, other than this what else can we check ?

comment and advice will be highly appreciated.

thanks.

regards,

kent