Logs in DMZ server

Hello ,
I have a DMZ server and an APIGeteway that will search for pending messages in the DMZ 'reverse invoke ', I often have messages that I lose but I don’t know where exactly, I wanted to know at the DMZ level if a message is waiting a long time for a return from APIGeteway and timeout, how can I know.
thank you

Hi ,
Are you looking for log locations of API Gateway installed in DMZ? The logs can be located in <>\IntegrationServer\instances\default\logs and <>\profiles\IS_default\logs.

Hope this helps.