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asuswrt-merlin.md

asuswrt-merlin.md 2.8 KB
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id: asuswrt-merlin title: "Asuswrt-Merlin" description: Asuswrt-Merlin Usage

hide_table_of_contents: true

This will enable legacy BIOS, and UEFI devices to PXE boot into the netboot.xyz menu on Asuswrt-Merlin devices.

Assume your AsusWRT-Merlin router is 192.168.1.1; Login to GUI

  1. LAN -> DHCP Server -> Basic Config: Set "Enable the DHCP Server" to Yes; IP Pool Starting Address: 192.168.1.2; IP Pool Ending Address: 192.168.1.254
  2. Administration -> System -> Service: Set "Enable SSH" to LAN Only
  3. Administration -> System -> Persistent JFFS2 partition: Set "Enable JFFS custom scripts and configs" to Yes

:::note

JFFS is a writeable section of the flash memory (the size will vary between router models, with the newer models having a bit over 60 MB of space available), which will allow you to store small files (such as scripts) inside the router without needing to have a USB disk plugged in. This space will survive reboot (but it might NOT survive firmware flashing, so back it up first before flashing!).

:::

  1. Reboot the router from the GUI and wait until you can ping 192.168.1.1
  2. ssh username@192.168.1.1
  3. mkdir /jffs/tftproot
  4. curl -o /jffs/tftproot/netboot.xyz.kpxe https://boot.netboot.xyz/ipxe/netboot.xyz.kpxe
  5. curl -o /jffs/tftproot/netboot.xyz.efi https://boot.netboot.xyz/ipxe/netboot.xyz.efi
  6. touch /jffs/configs/dnsmasq.conf.add
  7. nano /jffs/configs/dnsmasq.conf.add and add the following:

enable-tftp
tftp-root=/jffs/tftproot
dhcp-match=set:bios,60,PXEClient:Arch:00000
dhcp-boot=tag:bios,netboot.xyz.kpxe,,192.168.1.1
dhcp-match=set:efi32,60,PXEClient:Arch:00002
dhcp-boot=tag:efi32,netboot.xyz.efi,,192.168.1.1
dhcp-match=set:efi32-1,60,PXEClient:Arch:00006
dhcp-boot=tag:efi32-1,netboot.xyz.efi,,192.168.1.1
dhcp-match=set:efi64,60,PXEClient:Arch:00007
dhcp-boot=tag:efi64,netboot.xyz.efi,,192.168.1.1
dhcp-match=set:efi64-1,60,PXEClient:Arch:00008
dhcp-boot=tag:efi64-1,netboot.xyz.efi,,192.168.1.1
dhcp-match=set:efi64-2,60,PXEClient:Arch:00009
dhcp-boot=tag:efi64-2,netboot.xyz.efi,,192.168.1.1

  1. reboot and wait until you can ping 192.168.1.1
  2. from another device confirm that TFTP is working on the router

tftp 192.168.1.1
tftp> get netboot.xyz.kpxe
Received 368475 bytes in 0.5 seconds

  1. Test with an UEFI device and with a legacy BIOS device that PXE booting is working (you might have enable PXE booting in the BIOS and/or in UEFI. For UEFI you usually have to enable UEFI Networking stack).

References: