dynip

Client for easyDNS Dynamic DNS service.

easyDNS Dynamic DNS

"Dynamic DNS service is used to keep a domain name pointing to the same computer or server connected to the Internet despite the fact that the address (IP address) of the computer keeps changing. This service is useful to anyone who wants to operate a server (web server, mail server, ftp server, irc server etc) connected to the Internet with a dynamic IP or for someone who wants to connect to an office computer or server from a remote location with software such as pcAnywhere."

Prebuilt binaries avaiable for Windows, Mac, Linux here.

Usage

Dynip can be run manually as a command line utility, or installed to run as a service. In either case a config file must be created using the example dynip.conf as a template.

To update your IP address once:

dynip -f dynip.conf

Dynip will respond with one of:

MESSAGE	RETURN	DESCRIPTION
SUCCESS	0	IP address updated successfully
NO_CHANGE	0	IP address is already the requested value
TOO_SOON	-1	the request was issued before minimum interval elapsed
NO_SERVICE	-1	Dynamic DNS is not turned on for this domain
NO_AUTH	-1	password/token incorrect
SERVER_ERROR	-1	a generic error occurred on the server
LOCAL_ERROR	-1	there was a local error

Installation

Linux

Dynip can install itself automatically to run as a service on most Linux systems using Systemd, Upstart or SysV.

1. Copy dynip binary to /usr/local/bin or wherever you prefer to store your service binaries.

2. Create /etc/dynip.conf using the example dynip.conf as a template.

3. Run the commands:

   # this will install dynip as a service
   sudo /usr/local/bin/dynip -i -f /etc/dynip.conf
   
   # start the service
   sudo service dynip start
   
   # check service status
   sudo service dynip status

Alternatively you can configure Linux to run dynip as a service yourself. You must ensure the service manager starts dynip with "-d" flags, and you may include the "-f" specifying the location of dynip.conf if not located in /etc/dynip.conf.

Windows 7 or newer

Dynip can install itself automatically to run as a service on Windows 7 or later.

1. Copy dynip binary to c:\dynip\dynip.exe or wherever you prefer to store your service binaries.

2. Create c:\dynip\dynip.conf using the example dynip.conf as a template.

3. Press Windows+R to open the “Run” box. Type “cmd” into the box and then press Ctrl+Shift+Enter to run the following command as an administrator.

   # this will install dynip as a service
   dynip.exe -i -f c:\dynip\dynip.conf

   or

   # this will install dynip as a service to run as a specific user
   # `username` and `password` for actual credentials
   dynip.exe -i -f c:\dynip\dynip.conf -user username -pw password

4. Press Windows+R to open the “Run” box. Type “services.msc” into the box and then press enter to open Windows Services Manager. Ensure the Start-up Type for dynip is "Automatic". Right click on dynip and select "Start".

OSX/Launchd

Not yet tested, but this should work on a relatively recent version of OSX.

# this will install dynip as a service
sudo dynip.exe -i -f /etc/dynip.conf

Other

Dynip should work on any platform supported by Go 1.11.x or later. Follow the instructions below to build dynip for your platform. You can then install as a service manually

Building from source

1. Install Go 1.11.x or newer.

2. Clone this repo to your local machine.

3. Run go build.