Example 6 (the same as example 5 but with an additional condition)

Goal
You are an administrator of your office network. Your PCs have IP addresses, ranging 192.168.3.2-192.168.3.255. The office network is connected to the Internet by a NAT router running Microsoft Windows Server 2003 (192.168.3.1). Your goal is to count the Internet-traffic for every PC of the office network. The traffic between the PCs within the office network must not be accounted. You have an additional condition:
 
- to count the total Internet traffic of the whole office network
- to block the Internet access for a specific PC if this PC has reached the limit of 50mb of the Internet traffic

Solution
You should do the following:
- Install TrafMeter Service on a PC running a NAT router
- Choose two network adapters for the traffic capture in TrafMeter (the network adapter connected to the office network and the network adapter connected to your ISP)
- Select Active Capture Mode in TrafMeter
- Fill in the Local Address Table (LAT) with a range 192.168.3.1-192.168.3.255
- Create the filters for the traffic accounting (one filter per PC)

 Note

• In this example, the traffic will be captured from 2 network adapters simultaneously. Therefore, you should avoid counting the same packet twice. To do this, the Internet traffic of the network adapter, connected to ISP will be counted using a MAC address. Let's assume that the MAC address of that adapter is 010203040506.

 Note

• The traffic counters can be dropped to zero using TrafMeter Administrative Console or using the command line utility TrafReset.exe included in the TrafMeter package. You can schedule a launching TrafReset.exe by Windows Scheduler to obtain the daily/weekly/monthly traffic limits.
• In this example, you should not use the DHCP service to assign the IP addresses to the PCs.
• In this example, TrafMeter Service must run only on a NAT router.