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    advanced DynDNS service for professional use  

Windows client

We offer version 4.6 of our Windows program for automatic account updates (DynAccessPoster) for free download.

Version 4.6 16. march 2016 digital signiert unsigniert Windows NT/2k/XP/Vista/7/8/10

update notice

For the correct execution of this update, please read the following installation instructions.


The update software consists of just one (Win9x) or 2 (Win NT) files. After downloading, unpack the archive and copy the file(s) into a directory on your local hard disk.
Store the program on the computer which should later carry out the updates.
We intentionally avoid an interactive installation routine since the program (DynAccessPoster) doesn't create any registry entries etc. The program creates only a configuration file and a log file in the same directory and is kept simple as a matter of principle.

DynAccess.exe This program with graphical interface (GUI) carries out regular account updates and is used on all Windows platforms.
Once the program is started, you can iconify it so that it appears as a tray icon in the task bar next to the clock.

DynAccessD.exe This program is the daemon for operating systems based on Windows NT (NT/2k/XP). It does not run under Win95/98/me. The advantag of the daemon is that it can run as a service in the background and does not have to be explicitly started by the user. It is intended especially for server environments in which one does not explicitly log in to a computer and start programs by hand. The service starts itself automatically when the computer starts if it is correctly installed.
DynAccessD.exe is to be used in combination with DynAccess.exe. You can configure it via the program DynAccess.exe which has a graphical interface (GUI).
Whenever DynAccess.exe is active, DynAccessD.exe is inactive and activates itself automatically if DynAccess.exe is terminated.
Both programs are thus almost identical and complement each other.
However, it is important that DynAccess.exe and DynAccessD.exe are located in the same directory. After the first start, a file called "dynaccess.ini" is created. This stores configuration data which are used by both programs. The password is stored encoded.

If you would like to use the service (recommended), first you have to quickly install it with 2 keyboard entries.
Open an MS-DOS command window.
C:\>D:/DynAccessPoster/DynAccessD.exe -install
and if necessary specify other directory names.

If you receive a message about a successful service installation, type
C:\>net START DynAccessDaemon
You receive a message that the service has been started.

If you update the daemon, first you must stop it in order to copy the new version into the directory.
C:\>net STOP DynAccessDaemon
Then, start it again.

To de-install the service, proceed as follows:
C:\>D:/DynAccessPoster/DynAccessD.exe -uninstall

If you receive an error message that the service is marked for delete and no (de)installation could be carried out, please restart your computer.


Whether you use the daemon (NT/2k/XP) or the normal Windows version, in both cases start the program DynAccess.exe (see above) to carry out the configuration.
Enter your account data. Make sure to enter the correct values for Account and Domain. If your complete DynAccess account is for example, then enter "test" for Account and "" for domain.

Every change you make to the configuration must be confirmed with "save". If you move to another window, unsaved changes are discarded.

After successful configuration and saving you should receive a message about a successful account update.

Configuration check

If you have carried out an account configuration, then you should definitely check this. Via you can check your current account configuration (LOG).

Firewall configuration

You have to adapt your firewall if you have configured special rules for outgoing connections.
You have to allow DynAccessPoster a free outgoing connection according to the following overview.

Windows client Linux/Perl-client
(account update)
TCP 900TCP 905
(request the current dyn. IP)
TCP 901TCP 906
HeartBeat UDP 910UDP 910

No configuration is necessary for incoming connections.

If present, correspondingly adapt the intruder detection.
Due to the short intervals and the fact that the client always sends the same information, your firewall might block this. In the log, you can recognise intruder-detection defense if you see many account neutralisations.

Final note

It is not meaningful to start this update program (DynAccessPoster) more than once in your LAN. The DynAccess clients and their specifications are adapted to the DynAccess servers.
Multiple account updates from different programs have more negative than positive effects, especially when using the HeartBeat.


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