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Visual Studio .NET Data Matrix ECC200 for .NET

Figure 12.1: Use of a router and a firewall in the SBS 2003 Network using barcode implement for none control to generate, create none image in none applications.qr code generating asp.net In this case you canno none none t use the integrated firewall of SBS 2003, as the SBS does not function as a gateway between the Internet and the clients. Therefore, either the router must have a firewall function, or you must install an external firewall. You need to open in the firewall the ports that are necessary for SBS 2003.

A table in the Configuring a Firewall on a Router section gives an overview of these ports.. code 128 generating vb.net 12 . barcode printing asp.net Using the Integrated Firewall of SBS 2003 code 128 generation asp.net If the SBS 2003 has tw o network cards, the network must be configured as follows (see Figure 12.2) to allow the integrated firewall of SBS 2003 to function correctly with a broadband connection:. businessrefinery.com code 39 generator vb.net Figure 12.2: Using the integrated firewall of SBS 2003 when the SBS has two network cards businessrefinery.com create ean 13 asp.net To use the integrated firewall, connect one network card of the SBS 2003 to the local network through a switch or a hub. The other network card is connected to the device used for establishing an Internet connection, for example the DSL modem. In this case it is also possible to additionally install a firewall external to the firewall integrated in the SBS 2003.

This can be a router with firewall functionalities or an actual firewall. Pay attention to the tips given in the Securing the Router section, which follows..

Web Pages ean/ucc-14 creator in .net A Security Strategy for SBS 2003 Leitcode integrated for .net In the task list of th e Internet connection wizard, you must select Broadband Connection as the type of connection in this case (see the Network Task: Setting Up an Internet Connection section in 2). If you are using one more router with firewall functionalities, ensure that you select the Local Router Device with an IP-Address option (see the Network Task: Setting Up an Internet Connection section in 2)..

Securing the Router If you are using a rou ter for the Internet connection, and it simultaneously acts as a firewall and a wireless access point, you must ensure a correct and secure configuration for this device.. Securing the Wireless none for none Access Point (Base Station). If the router has the wireless access point feature and if there are no wireless devices installed in your company, you should deactivate this functionality. Otherwise, there is a risk of unknown users having unauthorized access to your network. More specific details for the deactivation of this feature will be available in the manual of the router.

If you use wireless devices, you must appropriately secure the access point in order to prevent or at the very least minimize the possibility of any unauthorized access. For this you need to first assign a password for the configuration of the router. Make sure that the password is not the default password assigned by the manufacturer of the router.

Next, you must enable encryption. For that you can use either the WEP (Wired Equivalent Privacy) Encryption or 802.lx Authentication.

The 802.lx authentication is newer and more secure than WEP. Both these procedures deal with the security protocol that encrypts the data transferred through radio waves from one device to another.

In case of WEP encryption, you must manually create a security key that will then be exchanged between the access point and the wireless devices. This security key is automatically generated in 802.lx.

If you have a choice between a 64-bit and a 128-bit key during WEP encryption, always use the longer key. For making your router even more secure, enable MAC (Media Access Control) filtering. For this, find out the MAC addresses of the wireless cards used in the network and enter this address list in the router.

This will ensure that only devices with the listed MAC addresses can access the access point. To find out the MAC address of a network card, enter the following command at the command prompt: ipconfig /all. The MAC address is displayed under Physical Address (see Figure 12.

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