Posted 07 May 2005 - 07:32 PM
The domain name server is a computer on your ISP's network which translates names of systems in the domain to IP addresses e.g it will translate www.nonsense.com into 188.8.131.52 which is the IP address of the "nonsense" website. If that server died no one on their network would be able to browse using names, so the ISP runs a backup domain name server. Hence you have a primary domain name server and a secondary domain name server. Your router will hold both these addresses.
"ping" is where a message is sent to a particuar IP address asking for a response. Usually if a ping is not responded to it means there is a network problem or the server is down. (Network problem includes it being the wrong address.)
I don't know whether your router came pre-configured or whether it is auto configured by your ISP but unless their primary domain name server is down I'd say the p2p stuff has altered the configuration. You need to check if you have instructions on how to reset the configuration in your router, or contact your ISP and ask them what to do.
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