Modern DSL modems by default allows you to establish a DSL link through them to provide internet connectivity.現代DSL調製解調器默認情況下，可以讓您建立一個DSL連接，通過他們提供網際網路連線。 The actual connection is handled by software running on your computer.實際方面是處理的軟件，您的計算機上運行。 The downside is that the client side software consumes your precious CPU cycles.壞處是，客戶端軟件，消耗寶貴的CPU週期。 Also the internet connectivity of your internal network is now dependent on a particular computer being up all the time.此外，互聯網的連接您的內部網絡是現在依賴於某一台電腦，被所有的時間。 The good news is that most (A)DSL modems can be configured to do much more to make your life easier and solve all the above problems.好消息是，大部分（一） DSL調製解調器可以配置做更多，使您的生活更輕鬆解決上述所有問題。 Modern DSL modems are like a mini-computer.現代DSL調製解調器就像是一個小型計算機。 They can act as a router, a gateway with NAT support, Firewall, DHCP server and also as a DSL modem.他們可以作為一個路由器，網關與NAT的支持，防火牆， DHCP伺服器，也作為一個DSL調製解調器。 Once you connect a properly configured ADSL modem to your hub or switch, all your computers will be automatically and transparently connected to the internet with firewall protection.一旦您連接正確配置ADSL調製解調器到您的集線器或交換機，您所有的電腦會自動和透明地連接到互聯網與防火牆保護。

It is preferable that you configure the DSL modems to establish the connection and also configure it to act as a router and gateway with NAT support.可取的做法是，你配置DSL調製解調器建立連接，並配置它作為路由器和網關的NAT的支持。 Most modern DSL modems will supports it.最現代的DSL調製解調器將支持它。 The DSL modems also can be configured to as a firewall.該DSL調製解調器，也可配置為作為一個防火牆。 This provides a good first level protection of your internal network.這提供了一個良好的第一級保護您的內部網絡。 You may need to configure the WAN / external ports it responds to; ideally none unless you have specific requirements to connect from outside.您可能需要配置廣域網/外部端口作出回應;理想，沒有除非你有特定要求的連接外。

Note: If you need to connect to your machines from the internet, you can configure your modem to forward the relevant port to a machine on your internal network.注意：如果您需要連接到您的機器從互聯網上，您可以設定您的調製解調器提出有關港口，以一台機器對您的內部網絡。

Both the ADSL modems I use (from BSNL & Tata Indicom) can be configured as above.無論是ADSL調製解調器使用（從印度BSNL ＆ Tata Indicom公司）可以配置成以上。 Here is how you can這裡是如何，您可以 configure DataOne Broadband to act as firewall, gateway with NAT support and to automatically connect to internet配置dataone寬帶充當防火牆，網關與NAT的支持和自動連接到互聯網 . 。
Note: Here is the注意：這裡是 alternative setup for BSNL Dataone Broadband for Linux替代設置為BSNL公司dataone寬帶為Linux . 。
Tata Indicom was configured by default to act as router. Tata Indicom公司是配置默認情況下，充當路由器。

Configuring as above allows you to seamlessly use your modem on both Windows and Linux machines.配置如上，讓您可以無縫地使用調製解調器對Windows和Linux的機器。 You can additionally configure it to enable the built-in DHCP server which will then automatically serve IP addresses for your internal network.您可以另外配置它使內置在DHCP服務器就會自動服務的IP地址為您的內部網絡。 Consult your modems manual and your DSL connection provider for details.諮詢您的調製解調器手冊和您的DSL連接供應商的詳情。

With the above configuration in place, you have to just connect the modem to your hub / switch.與上述配置在的地方，你必須只要連接調製解調器到您的樞紐/開關。 Set all of your machines to use DHCP and set the internal modem IP (most likely 192.168.1.1; read the fine manual) as your gateway & DHCP server and you are good to go.設置您的所有機器使用DHCP ，並設置內置調製解調器的IP （最有可能192.168.1.1 ;可閱讀手冊）作為您的網關及DHCP伺服器和你是很好的路要走。 Your machines will now be transparently connected to the internet.您的機器現在將透明的連接到互聯網。 The modem does all the dirty work of converting your internal IP address to external IP address and route the packets appropriately in both directions.調製解調器是否所有骯髒的工作轉換您的內部IP地址的外部IP地址和路由的數據包適當的兩個方向。

Tip: You must change the default password for your modem.提示：您必須更改默認的密碼為您的調製解調器。 By default the modems may allow connection from the internet.默認情況下，調製解調器可能會允許連接從互聯網上。