Web Proxy Log - Which interface ?

Hi All,

We are using Sophos UTM as a web proxy, we have multiple internet interfaces.

I'm using a "Multipath" rule to send certain domains out of a certain interface.

But where and in what log will it show me what traffic is going out of what interface ? Although the multipath rule is working (i Think) I need to confirm a few things (I suspect that HTTP traffic is working fine as domains as specified as example.com load fine via HTTP, inc subdomains but not on HTTPS)

Thanks,