RouterOS allows slight system customization with the help of a branding package. This is a special system package, which you can generate from within your mikrotik.com account, in the account section "Branding maker". The resulting file will have a .dpk extension and can be installed by all the same means as an .npk package. The generated package can be installed in any RouterOS version. To install the package in a device you simply need to upload it and reboot the router, you can also use Netinstall tool for the same effect.

ASCII logo

This is the text logo shown when logging into the command line interface, i.e. Telnet, SSH, Winbox Terminal. The ASCII logo you can create right there in the browser, or copy from any other plaintext editor. Make sure it is not wider than the form in the branding maker page, or your logo will be distorted.

Default webpage

You can customize the default RouterOS information page, which shows up when accessing the router IP address, and a password is set on the device. When making the HTML file, you can use these variables:

The file must be named "index2.html". Make sure you use properly nested HTML to make your page compatible with all browsers. You can also upload images or JavaScript files, they must reference to the same path as the index file, no custom folder names can be used. If you wish to only change the MikroTik logo, and not upload the whole HTML file, the name of the default image is mikrotik_logo.png, uploading another file with the same name, will overwrite the original.

Other values

In order to apply particular skin to a specific user group, you don't need to log into the router to do that. You can do it with branding by uploading a Default configuration file.
Or set the skin for the user group manually after reboot.