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

www.easydns.com

# This is configuration file for
# http://www.easydns.com/
# dynamic DNS service provider
# By Pierre Fillion 2005/01/29
#
# IMPORTANT NOTE: 
#
# It seems to work only with one host name per account
# like *.domain.com
#
# If more than one host name is specified for an account
# a host gets created with all host names.
#
# Like if you enter *.domain.com and www.domain.com hosts
# it will create a new host called "*.domain.com,www.domain.com"
# instead of updating both hosts.
#
# A workaround is to create 2 distinct accounts
# one for each host.
#
# Dont forget to specify the file easydns.com.txt as profile
# when you create your account.
#
# No change is needed in this file
#
# Enter hostname on program complete with domain name

[default]
withpass=1
host=members.easydns.com
port=80
path=/dyn/dyndns.php

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

[result]
multilines=0
success=NOERROR
warning=NOACCESS