servlets - How to get client Ip Address in Java HttpServletRequest -

i trying develop java web application (servlet) need clients ip address.

please not considers duplicate question because tried possible answers available in stackoverflow.

following code far:

1)

string ipaddress =  request.getremoteaddr(); 

in case of tome 'default gateway adress'(147.120.1.5). not machine ip address(174.120.100.17).

2)

string ipaddress = request.getheader("x-forwarded-for");      if (ipaddress == null) {          ipaddress = request.getremoteaddr();      }  

in case of tome 'default gateway adress'(147.120.1.5). not machine ip address(174.120.100.17).

3)

inetaddress ip=inetaddress.getlocalhost(); system.out.println(ip.gethostaddress()); 

in case got server ip address(147.120.20.1).

my ip address in 147.120.100.17.now don't know how real client ip address. please make answer.

thank much.

try one,

    string ipaddress = request.getheader("x-forwarded-for");          if (ipaddress == null) {            ipaddress = request.getremoteaddr();      } 

reference : http://www.mkyong.com/java/how-to-get-client-ip-address-in-java/