couple things here ...
from the beginning so you have a wire coning in the house from your cable/isp .. and it goes to what first ? exact name of device
then at some point you have a linksys router ... what model
back ground ..
first there are 2 networks you are dealing with WAN & LAN
wan .. wide area network is the public internet side of the router
lan .. local area network with non routable ip address
for the purpose here most routers ( homeowner ) are setup with DHCP and give out ip address automatically to the computers and the like on the LAN side of ..
192.168.1.100 to 192.168.1.200
subnet mask of 255.255.255.0
default gateway 192.168.1.1
DNS is gotten from the isp ( here in this thread the isp is giving 64.71.255.198 as the DNS server )
DNS .. domain name server
what dns does is it takes the "freindly" name
Yahoo! and converts it to an ip address and then it locates that server all in a split second. If you could remember the ip address of a website you do not need DNS, but we can't
in the example posted by "emsodus" you can actually see the process of DNS in action when either pinging or tracert a WWW name it converts it to an IP adress then finishes the comand using the IP address. just like your browser does.
browsers use Port 80 which is "http" traffic hence in your browser http://
www.server name
some admins turn off .. the pinging function .. to there server, i think if i remember it is ICMP, so some thing u cannot ping
so anyway there are couple things ... like using a gaming access point there are extra setups to allow certain ports to open and close as there are about 5,000. some homeowner routers/cable modems this must be enabled.
if you can give us an exact picture of what epuiment you have and in what order it would we can help easier
thanks .. sorry for being long winded ..