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| CommTraffic Help Documentation |
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The Local Networks page allows you to specify blocks of IP addresses that CommTraffic should treat as local (the traffic between these addresses will be ignored). The Internet traffic statistics for the hosts specified in the Local Networks page will be displayed in the Reports section of the program. Please click on the Detect button to have the program determine the block of addresses automatically and add it to the list. If there are additional addresses that belong to your local network, please enter them in the network address/network mask format. Please note that in order for the program to count the traffic correctly, it is very important to specify the correct network address and network mask for your local network. Network mask is the number obtained from your network administrator or your Internet service provider. This number is combined with the IP address number to identify which network segment your computer is in. A subnet mask is a 32-bit number that is notated by using four numbers from 0 through 255, separated by periods. Typically, default network mask numbers use either 0 or 255 as values (such as 255.255.255.0), but other number values can appear. Please contact your network administrator or ISP to get the correct network mask if unsure. Click on the Add button to add a new network address/network mask pair. When entering an IP address, you can use an alias that is stored in the program's list of aliases by selecting IP aliases from the drop-down menu. Please click on the OK button after entering the network address/mask. You can specify the range of IP addresses in the Pro version only; the Home version only allows you to monitor a local network of up to 5 hosts, that you must enter one by one. If you would like to edit an entry, select it and click on the Modify button, or double-click on the line that you would like to edit. To delete an entry select it and click on the Delete button. Dragging the column header to the desired place will change the sequence of columns. You can hide certain columns by right-clicking on the header of a column and unchecking the entries that you need to hide. Right-clicking on the Local Networks page brings up the following menu: Add - launches a dialog window for adding an entry. Modify - allows you to modify the selected entry. Delete - deletes the selected entry. Detect – allows the program determine the block of addresses automatically and add them to the list. Create Alias – opens the dialog for adding aliases and comments to the selected IP address. Copy - copies the selected line, its part, or all entries to the clipboard. Open - allows you to open any file containing network addresses (.ctipr, CommTraffic native format) from the disk. Save - saves the listed network blocks to the disk in CommTraffic format (.ctipr), as well as in HTML, XML, RTF, XLS and text file formats. Print – opens the printing dialog window. Options – opens a dialog window where you can change the appearance of the Local Networks page. Please note that the unmodified local IP addresses must be present in the packets transmitted through the adapter that you are monitoring in order to calculate the statistics per LAN host. Below is a sample network configuration: 
The Local Networks page in CommTraffic has the LAN IP addresses specified. If these addresses belong to regular, routable blocks, it really does not matter which adapter you monitor, NIC1 or NIC2. However, if the hosts on your LAN are assigned non-routable IP addresses (such as 10.0.0.0/255.0.0.0 or 192.168.0.0/255.255.0.0 networks), and the Network Address Translation (NAT) is applied for accessing the Internet, you can only monitor the NIC1 adapter. If you monitor the NIC2 adapter, you will only see one and the same source IP address for all packets, which is the address of the adapter on which the NAT is applied, and the program will not be able to calculate the traffic statistics. If you need to monitor the external network interface (NIC2), you need to clear the Local Networks page and enter one (routable) IP address that is assigned to that interface. This will enable CommTraffic to calculate the total traffic, but it will not be able to break it down by LAN hosts. |
