This is the /etc.defaults/ddns_provider.conf file for Synology DiskStation NAS devices with a provider added for DNSMadeEasy.com DynamicDNS service.

ddns_provider.conf

# Input:
#    1. DynDNS style request:
# Input:
# Input:
#    1. DynDNS style request:
#       modulepath = DynDNS
#       queryurl = [Update URL]?[Query Parameters]
#
#    2. Self-defined module:
#       modulepath = /sbin/xxxddns
#
#       Our service will assign parameters in the following order when calling module:
#           ($1=username, $2=password, $3=hostname, $4=ip)
#
# Output:
#    When you write your own module, you can use the following words to tell user what happen by print it.
#    You can use your own message, but there is no multiple-language support.
#
#       good -  Update successfully.
#       nochg - Update successfully but the IP address have not changed.
#       nohost - The hostname specified does not exist in this user account.
#       abuse - The hostname specified is blocked for update abuse.
#       notfqdn - The hostname specified is not a fully-qualified domain name.
#       badauth - Authenticate failed.
#       911 - There is a problem or scheduled maintenance on provider side
#       badagent - The user agent sent bad request(like HTTP method/parameters is not permitted)
#       badresolv - Failed to connect to  because failed to resolve provider address.
#       badconn - Failed to connect to provider because connection timeout.
#
[DYNDNS.org]
        modulepath=DynDNS
        queryurl=members.dyndns.org/nic/update?hostname=__HOSTNAME__&myip=__MYIP__&system=dyndns&wildcard=NOCHG&mx=NOCHG&backmx=NOCHG
[TwoDNS.de]
        modulepath=DynDNS
        queryurl=update.twodns.de/update.php?hostname=__HOSTNAME__&myip=__MYIP__
[NoIP.com]
        modulepath=DynDNS
        queryurl=dynupdate.no-ip.com/nic/update?hostname=__HOSTNAME__&myip=__MYIP__
[able.or.kr]
        modulepath=DynDNS
        queryurl=able.or.kr/ddns/src/update.php?hostname=__HOSTNAME__&myip=__MYIP__&ddnsuser=__USERNAME__&pwd=__PASSWORD__
[3322.org]
        modulepath=DynDNS
        queryurl=www.3322.org/dyndns/update?hostname=__HOSTNAME__&system=dyndns
[selfHOST.de]
        modulepath=DynDNS
        queryurl=carol.selfhost.de/nic/update?hostname=__HOSTNAME__&myip=__MYIP__
[Dynamic DO!.jp]
        modulepath=Ddojp
        queryurl=free.ddo.jp/dnsupdate.php?dn=__HOSTNAME__&pw=__PASSWORD__&ip=__MYIP__
[ChangeIP.com]
        modulepath=DynDNS
        queryurl=nic.ChangeIP.com/nic/update?hostname=__HOSTNAME__&myip=__MYIP__&system=dyndns
[DNSPod.com]
        modulepath=DNSPod
        queryurl=dnsapi.cn/Record.Modify?login_email=__USERNAME__&login_password=__PASSWORD__&format=xml&domain_id=__DOMAINID__&record_id=__
[Zoneedit.com]
        modulepath=Zoneedit
        queryurl=dynamic.zoneedit.com/auth/dynamic.html?host=__HOSTNAME__&dnsto=__MYIP__
[Freedns.org]
        modulepath=Freedns
        queryurl=freedns.afraid.org/dynamic/update.php?user=__FreednsSHA1__&host=__HOSTNAME__&address=__MYIP__
[Oray.com]
        modulepath=DynDNS
        queryurl=ddns.oray.com/ph/update?hostname=__HOSTNAME__&myip=__MYIP__
[Synology]
        modulepath=Synology
        queryurl=myds.synology.com
        register_module=synology
[DNSMadeEasy.com]
        modulepath=DynDNS
        queryurl=www.dnsmadeeasy.com/servlet/updateip?username=__USERNAME__&password=__PASSWORD__&id=__HOSTNAME__&ip=__MYIP__