A report from the OpenNet Initiative watchdog group last April singled out Cisco for allegedly enabling the Chinese government's notorious "Great Firewall," a filtering system that prevents Chinese netizens from visiting websites that criticize the government.
Cisco's routers, the report noted, form the backbone of China's internet access, and include the power to identify and filter packets based on keyword matches -- a tool typically used for fighting viruses and denial-of-service attacks that also makes internet censorship easier for repressive governments.
Rebecca has also been covering this story and has a detailed account of her conversation with a Cisco Rep generating, as noted, a lot of debate and criticism.
I think that there are two issues here, related for sure, but likely somewhat seperate: filtering and monitoring. We know that filtering is occuring on multiple levels and monitoring would follow that same pattern. Like filtering, the location at which the monitoring is taking place affects the usabilty of the data collected. It also affects the processing and response capability.