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

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### Tärkeää tietoa

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, or your ISP is rerouting DNS changes, 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.
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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.
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### Tarpeet

* The latest release of [SafeB9SInstaller](https://github.com/d0k3/SafeB9SInstaller/releases/latest)
* The latest release of [boot9strap](https://github.com/SciresM/boot9strap/releases/latest) *(`boot9strap-1.3.zip`; not the `devkit` file, not the `ntr` file)*
* The latest release of [Luma3DS](https://github.com/LumaTeam/Luma3DS/releases/latest) 

### Ohjeet

#### Vaihe I – Valmistelut
1. Sammuta konsolisi
1. Aseta SD-korttisi tietokoneeseesi
1. Copy `boot.firm` and `boot.3dsx` from the Luma3DS `.zip` to the root of your SD card
1. Luo `boot9strap`-niminen kansio SD-korttisi juureen
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. Aseta SD-korttisi takaisin konsoliisi
1. Käynnistä konsolisi

#### 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. Sammuta konsolisi

#### 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
  + If the update does not fail, it is possible that your ISP is rerouting DNS changes. Try another internet connection, or follow an alternate method, like [Seedminer](seedminer).
1. Press "OK" to close the error message
1. Jos haavoittuvuuden hyödyntäminen onnistui, SafeB9SInstallerin pitäisi avautua
  + If the console freezes or crashes, force power off the console, then retry this section
 
#### Section IV - Installing boot9strap

1. Odota, kunnes kaikki turvatarkistukset on suoritettu
1. Syötä kehotettaessa annettu painikeyhdistelmä asentaaksesi boot9strapin
1. Kun toiminto on suoritettu, paina (A):ta käynnistääksesi konsolisi uudelleen

#### Section V - Configuring Luma3DS

1. Konsolisi pitäisi uudelleenkäynnistyä suoraan Luma3DS:n määritysvalikkoon
  + Jos saat mustan ruudun, [seuraa tätä vianmääritysohjetta](troubleshooting#musta-ruutu-boot9strapin-asentamisen-jälkeen-kun-sysnand-on-käynnistetty)
1. Käytä (A):ta ja ristiohjainta ottaaksesi seuraavat asetukset käyttöön:
  + **"Show NAND or user string in System Settings"**
1. Paina (START)-painiketta tallentaaksesi ja käynnistääksesi uudelleen
  
#### 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. Sammuta konsolisi

___

### Jatka osioon [Asennuksen viimeistely](finalizing-setup)
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