I want to create a monitoring solution for my existing clients using a VPN, a Dell Server and some monitoring software.
My clients have their own Server and Workstations, connected together in a small LAN environment. Their offices are connected using a Draytek Router via ADSL 8Mbit. My proposition is to connect my site to the offices using a VPN, whilst at the same time preventing the transfer across the VPN of any non-monitoring-related data, such as domain information.
I'm looking for a monitoring solution which is cost effective, reliable, robust and most importantly something that can be focused at Small Businesses operating with no more than 75 users. The solution would need to be able to monitor servers, routers and switches in-terms of CPU/Memory usage, Free Disk Space, Error Reporting etc.
Another thing to mention is both my domain and their own domain is on a different subnet, IP range and totally different domain information.
I would appreciate any recommendations on a monitoring solution here. A bonus would be something that can monitor as close to real-time as possible.
Thanks in advance.