---
title: "Installing boot9strap (safecerthax)"
---

{% include toc title="Inhalt" %}

### Lesen erforderlich

safecerthax is compatible with all Old 3DS and Old 2DS devices in all regions.

If your (Right/Left Shoulder), (D-Pad Up) or (A) buttons do not work, you will need to use an alternate method, like [Seedminer](seedminer). For assistance with this matter, join [Nintendo Homebrew on Discord](https://discord.gg/MWxPgEp) and ask, in English, for help.
{: .notice--warning}

This exploit will not work on the New 3DS, New 3DS XL, or New 2DS XL. Please ensure that the device you are modding is an Old 3DS, Old 3DS XL, or Old 2DS before continuing.
{: .notice--info}

### Was du brauchst

* The latest release of [SafeB9SInstaller](https://github.com/d0k3/SafeB9SInstaller/releases/latest)
* The latest release of [boot9strap](https://github.com/SciresM/boot9strap/releases/latest) *(standard boot9strap; not the `devkit` file, not the `ntr` file)*
* The latest release of [Luma3DS](https://github.com/LumaTeam/Luma3DS/releases/latest) 

### Anleitung

#### Schritt I - Vorbereitungen
1. Schalte deinen 3DS aus
1. Stecke deine SD-Karte in deinen Computer
1. Copy `boot.firm` and `boot.3dsx` from the Luma3DS `.zip` to the root of your SD card
1. Erstelle einen Ordner namens `boot9strap` im Stammverzeichnis deiner SD-Karte
1. Copy `boot9strap.firm` and `boot9strap.firm.sha` from the boot9strap `.zip` to the `boot9strap` folder on your SD card
1. Copy `SafeB9SInstaller.bin` from the SafeB9SInstaller `.zip` to the root of your SD card
1. Stecke deine SD-Karte nun wieder in deinen 3DS
1. Schalte deine Konsole an

#### Section II - safecerthax DNS
1. Launch the System Settings application
1. Navigate to `Internet Settings` -> `Connection Settings`
1. Click on your network connection slot and navigate to `Change Settings` -> `Next Page (right arrow)` -> `DNS`
1. Set "Auto-Obtain DNS" to "No", then click `Detailed Setup`
1. Set both the Primary DNS and Secondary DNS to `054.038.133.070`
1. Click OK, then click Save
1. When prompted, click "Test" to perform the connection test
	+ The test should succeed
1. Schalte deinen 3DS aus

#### Section III - safecerthax
1. With your device still powered off, hold the following buttons: (Left Shoulder) + (Right Shoulder) + (D-Pad Up) + (A), then press (Power)
  + Keep holding the buttons until the device boots into Safe Mode
1. Press "OK" to accept the update
  + There is no update. This is part of the exploit
1. Press "I accept" to accept the terms and conditions
  + The update should fail and an error message should appear
1. Press "OK" to close the error message
1. Wenn der Exploit erfolgreich war, wird nun direkt zum SafeBS9Installer gebootet
  + If the console freezes or crashes, force power off the console, then retry this section
 
#### Section IV - Installing boot9strap

1. Warte auf alle Sicherheitsüberprüfungen
1. Gib die Tastenkombination zur Bestätigung ein, wenn danach verlangt wird
1. Sobald dies abgeschlossen ist drücke (A) um das Gerät neuzustarten

#### Section V - Configuring Luma3DS

1. Dein Gerät sollte neu starten und die Luma3DS Konfiguration anzeigen
  + Wenn du einen schwarzen Bildschirm siehst, [Folge diesen Anweisungen](troubleshooting#black-screen-on-sysnand-boot-after-installing-boot9strap)
1. Benutze den (A) Knopf und das Steuerkreuz, um Folgendes zu aktivieren:
  + **"Show NAND or user string in System Settings"**
1. Drücke (Start) zum Speichern und neustarten
  
#### Section VI - Restoring default DNS
1. Launch the System Settings application
1. Navigate to `Internet Settings` -> `Connection Settings`
1. Click on your network connection slot and navigate to `Change Settings` -> `Next Page (right arrow)` -> `DNS`
1. Set "Auto-Obtain DNS" to "Yes"
1. Click OK, then click Save
1. When prompted, click "Test" to perform the connection test
	+ The test should succeed
1. Schalte deinen 3DS aus

___

### Fortfahren mit [Setup fertigstellen](finalizing-setup)
{: .notice--primary}