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

freedns.afraid.org

# This is configuration file for
# http://freedns.afraid.org/
# dynamic DNS service provider
#
# No change is needed in this file
#
# Enter hostname on program complete with domain name
# From FreeDNS pages get the Token information for the entry you want
# to update and replace <TOKEN> in the path with it
# ex:
# /dynamic/update.php?<TOKEN>
# should become something like
#
# /dynamic/update.php?dsjhasf4325hjbfj22hj3h2jj5fcfeurincn5352k3j4kje==

[default]
withpass=0
host=freedns.afraid.org
port=80
path=/dynamic/update.php?<TOKEN>
protocol=http

[requests]
&address=%IP%

[result]
multilines=0
success=Updated
warning=ERROR