We're in a semi-managed environment, and I don't have an internet-facing router. Normally, I would grab bandwidth usage stats from the WAN port of a router via SNMP/MRTG. Unfortunately, the router is owned by the hosting company, and we rely on their usage graphs for billing purposes.
Recently, according to them, our bandwidth usage has been increasing. I don't have a reason not to believe them, I just want to keep them honest.
I have an internet-facing ASA. Is there a way to continuously monitor the inbound & outbound traffic counts on the ASA's external interface, save them somewhere, and analyze/graph the results? I want to compare the data to the graphs provided by our hosting company.
Thanks for any assistance.