Free for PREMIUM members
Veeam is happy to provide a free NFR license for one year. It allows for the non‑production use and valid for five workstations and two servers. Veeam Agent for Linux is a simple backup tool for your Linux installations, both on‑premises and in the public cloud.
The logging of TmG is good, but you can't see everything.
The only monitoringserver I use except build in windows is Cacti
Cisco has such advanced logging, but then you need to configure the vpn on the cisco router.
You can try Internet Access monitor
you need to install a bridge from your clients to the server
I am using it with TMG 2010 and Server 2008 R2.
Watch this video to see how easy it is to make mass changes to Active Directory from an external text file without using complicated scripts.