I have a Cisco 1811 router which connects my network to the Internet and provides ip addresses to clients via DHCP. Internally, I have a MS Small Business Server that serves as the internal DNS and forwards requests to OpenDns.org
I have recently installed some network tools to analyze internal traffic (packetter / netflow analyzer), however the tool can not resolve and internal ip's name. For example, if a client is given ip 192.168.1.10 I need to know the computer name (ej. JDOE). I thought of adding the names to the local DNS but since we are using DHCP they are constantly changing.