first of all
Code:
sudo apt-get install build-essential
go to noip website and download th linux client
extract it and open a terminal in the extracted folder.
now run these:
Code:
make
Code:
sudo make install
Code:
sudo chmod 770 /usr/local/etc/no-ip2.conf
(u r allowed to think about better permissions)

to see the help:
Code:
noip2 -h
u can run after computer startup manually from command line or add it System-->Preferences-->Startup Applications.
the command is:
Code:
noip2
-----------------------------------------------------------
if running behind a router:
the command is:
Code:
noip2 -F
(this will tell the client not to send your internal LAN-ip)

in the router, in order to tell it what to send to your computer in the LAN (even if you'r the only one there)
set up a static ip in the LAN to your computer. and then
do one of the following:
- add you'r computer to DMZ
OR
- specify specifically port-forwarding per a process.
OR
- specify server applications for your LAN-ip in th router (probably router dependent)

enjoy(;