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

dynup.net

# This is configuration file for
# http://www.dynup.net
# dynamic DNS service provider
#
# No change is needed in this file
#
# Enter hostname on program without domain name

[default]
withpass=0
host=www.dynup.net
port=80
path=/update/java.php3

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

[result]
success=Update complete!
multilines=0