Different ISPs require different configurations. If you have a Linksys router, such as the WRT54G, there are 2 ways on how you can configure it, either by running the Setup CD or by doing manual configuration. I prefer manual configuration as it is more convenient. This particular router has its own web utility and you can access it by typing its IP addres on your web browser, ex. http://192.168.1.1. By default, it doesn’t have any username and its password is admin.
Once you’re inside the setup page, you can configure now the router for DHCP, PPPoE or STATIC IP settings. For DSL customers using a PPPoE account, some modem needs to be configured into BRIDGE MODE first and then the router will be set to PPPoE with the correct username and password (given by ISP). If in case the customer has DHCP account, modem doesn’t require any configuration. It will work with its default setting and the router would be set to DHCP. Once done, powercycle your devices to establish internet connection.
Once internet is up and running on your router, you can now setup file and printer sharing between your computers, you can also configure other application to your router, like VPN settings and VoIP service etc. If you’re looking for cheap and reliable voice over ip providers, check out more information at getisp.info. You can browse through their list of many VoIP, DSL, Cable and Wireless service providers for high speed Internet access.
If you have further questions, just leave a comment and I’ll be more than glad to help you out.