Problem Relating Getting Client Ip

Hi,All

I have Heared about

string ip=Request.ServerVariables["REMOTE_ADDR"].ToString() ;


and

string strHostName = System.Net.Dns.GetHostName();
string ip=System.Net.Dns.GetHostAddresses(strHostName).GetValue(0).ToString();

These Two things for getting the clients Ip Address.


I have A confusion
about these two

These Two Solution Are giving me different Ips

First Is giving me the series of 127.x.x.x   series

And Second is giving me the General series As u have seen like 192.xxx.x.xx etc


Why Is the difference Which is correct

Actually the sceniorio is that At my side There Are 5pcs Suppose Each of then is connected Throgh each other With LAn

Each of them has internet .And Each of them Are getting Internet from single router I think .


So which Ip is correct.

Actually i want to capture the Ip of remote ...