[ExtremePluginz] How to make static ip for cs 1.6 server

One of my friend who ask me for how can i keep one ip or permanent ip
There are two method to make static ip
1.Purchase static ip from internet service provider
2.Use Dns [Domain name system ]

For Dns use free website : http://www.noip.com/
ddns.net:27015 look like after apply dns but actual ip 120.21.234.211:27015
Everyday you have to update your ip on noip.com
Player will connect using ddns.net:27015

Note: This is only for Home HLDS
Better buy Vps or Dedicate server from datacenter