Copy and paste the following line into a text file. See also this faq for information on how to use the configuration file.

www.no-ip.com

# This is configuration file for
# http://www.no-ip.org
# dynamic DNS service provider
# NOTE: it doesn't take an "IP didn't change" return code as warning

# By Nicolas Alvarez 26/12/2005

[default]
withpass=0
host=dynupdate.no-ip.com
path=/dns
port=80

[requests]
username=%USER%
password=%PASS%
hostname=%HOST%
ip=%IP%

[result]
multilines=0
success=0
success=1
warning=2
warning=3
warning=4