You would have received a simple set-up guide via email containing your Static IP information. You may refer to the instructions stated in the mail!
If you are still facing difficulties setting up your Static IP and you are using a router that was purchased through MyRepublic, file a Support Ticket with a help request or contact us at 6717 1680. We will do our best to help.
We seek your understanding in that we won’t be able to provide comprehensive technical support for the many applications and devices that Static IP can be used for.