Namecheap multiple domain hosts with ddclient



Wednesday, August 22, 2012

Linux Make ddclient Work with Multiple Namecheap Domains


If you are using ddclient 3.8.1 or older, and are updating multiple Namecheap domains, there is a possibility it is not working.

If you are updating multiple domains, for example and, along with multiple hostnames for each domain, for example @, www, or mail, ddclient will only update the first hostname it encounters.

For example, if your /etc/ddclient/ddclient.conf looks like the configuration below, during each update only,,, and will be updated.,, and will not be updated because those hostnames were already checked for the first domain name.

protocol=namecheap, \, \ \ password=faefjawpefoij30498320493r23 \ @, www, mail protocol=namecheap, \, \ \ password=faefjawpefoij30498320493r23 \ @, www, mail, smtp

The following steps can be followed to fix this. Note that this patch has only been tested on ddclient 3.8.1 running on RHEL 6. Your mileage may vary with different versions and Linux distributions, and this patch may be applied to future ddclient releases negating the need for these steps.

Patch ddclient

Stop the ddclient service:

service ddclient stop

Copy your existing ddclient binary to another folder:

mkdir /root/ddclient-patch cp /usr/sbin/ddclient /root/ddclient-patch/

Download and save the ddclient patch:

wget -O /root/ddclient-patch/ddclient.patch

Change to the directory:

cd /root/ddclient-patch

Apply the patch:

patch -b -p0 -i ddclient.patch # Successful output patching file ddclient

Copy the newly patched ddclient back:

cp /root/ddclient-patch/ddclient /usr/sbin/

Modify /etc/ddclient/ddclient.conf

Modify your /etc/ddclient/ddclient.conf file and add the domain name to each hostname like so:

protocol=namecheap, \, \ \ password=faefjawpefoij30498320493r23 \,, protocol=namecheap, \, \ \ password=faefjawpefoij30498320493r23 \,,,

Start the ddclient Service Again

Remove the ddclient cache file:

rm /var/cache/ddclient/ddclient.cache

Start the service:

service ddclient start

Monitor /var/log/messages to verify everything is working.

Using DDclient with NameCheap DNS Hosting


If you have a linux server and want to use the Namecheap DDNS service you will want to use ddclient which is compatible with Namecheap’s service.



How to configure your Linux host with DDclient




DDclient is a Perl client used to update dynamic DNS entries for accounts on Dynamic DNS Network Services’ free DNS service. It was originally written by Paul Burry and is now mostly by wimpunk. It has the capability to update more than just dyndns and it can fetch your WAN-ipaddress in a few different ways. Check the configuration pages to find how to do this.

According to

DDclient is a small but full featured client requiring only Perl and no additional modules. It runs under most UNIX OSes and has been tested under GNU/Linux and FreeBSD. Supported features include: operating as a daemon, manual and automatic updates, static and dynamic updates, optimized updates for multiple addresses, MX, wildcards, abuse avoidance, retrying failed updates, and sending update status to syslog and through e-mail.


All news can be found on the news page but this are the lastest messages

You can also check the mailinglist to find out what’s going on.


Most distributions have a recent version of ddclient. Use it unless you really need the latest version. On debian-based systems you can run apt-get install ddclient and it will install ddclient. Unless there is a good reason, you should’t use the download link.


Ddclient doesn’t have an automatic installation procedure. Get the tar-file from using the download button and untar it. Copy the perl script to your favorite location (ex. /usr/sbin)
and create a /etc/ddclient/ddclient.conf configuration file. Don’t forget to create the cache directory.

If you want the bleeding edge of ddclient, you can access the latest version using svn. Instructions can be found on the code section.

When upgrading just replace the ddclient file by the one from the package, read the release notes and modify the cache file.


If you installed ddclient by using the installer of your distribution, it probably already asked you some questions and prepared a useful config file.

There are a few configuration examples provided which you can copy to /etc/ddclient/ddclient.conf and modify. More info about the configuration can be found on the usage page. There’s also a sample configuration delivered with ddclient.

A typical configuration like:

# /etc/ddclient/ddclient.conf

You can run ddclient as /usr/sbin/ddclient -daemon 300 -syslog and put it in your startup scripts. There are samples of startup scripts provided with ddclient. Most distributions provide a generic startup sample. You can change it to work with ddclient. As there are to many different distributions, ddclient doesn’t maintain all of them.


The documentation about the configuration has been split into three sections. The usage page describes the most parts of the configuration while the supported protocols page describes the protocol-specific options. If you want to know how to use ddclient with your router, check the supported routers.

Debugging ddclient looks pretty hard but it isn’t. First try to put as less as necessary in your configuration. Try to run

./ddclient -daemon=0 -noquiet -debug

and check the result. Try to add the features you need and check it again.

Once you’re happy with the result, run it as a daemon.

If this doesn’t work for you, there are a few places where you can look for help. If you need any help in configuring ddclient,
You could try ddclient –help. It should give you all the possible configuration options so.

If you think your configuration is correct, but ddclient doesn’t work as you expected, you can enable debug and verbose messages by running

ddclient -daemon=0 -debug -verbose -noquiet

We know the manual is not very clear, you have to read the example configurations included in the tar-file or you can run ddclient --help to get more help.

Help and bugreporting

If you need extra help, have any bug to report, an enhancement to submit or a feature request, you can use the ddclient mailing list or create a new ticket. Please only post bugs against the latest version of ddclient.



How to configure DDClient?

The following is the format of configuring ddclient.

password=your dynamic dns password

Here is the example of its usage. If you would like to setup dynamic dns for (without www), then following is its configuration:


If you need to dynamically update a subdomain then you need to subsititute host as subdomain.
To dynamically update the domain itself (, you need to replace host with @.

Installing and Configuring CentOS on Xen Server using Xen Center



If you have two NICs you have to ensure that the NIC on the physical server that is connected maps to the Network property that the virtual machine will be using….


For example,: Network 0, Network 1 are the default networks on Xen. If you only have an Ethernet cable in one of the NICs then one of the two Networks will be available. This is important to verify when you ‘re setting up a new VM so that all your configuration settings for eth0 or eth1 are mapped to the proper Network # in Xen Center.