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

yi.org

# This is configuration file for
# http://www.yi.org
# dynamic DNS service provider
#
# No change is needed in this file
#
# Use your complete hostname as userid in account setting

[default]
withpass=1
host=www.yi.org
port=80
path=/bin/dyndns.fcgi

[requests]
ipaddr=%IP%

[result]
success=STATUS:OK
multilines=1