Brandingfreies Image für 7520 zurück auf Original mit Telnet

[Osprey]

Einige haben von euch eine 7520 mit den Image von FritzOS8.0 und möchten aus irgendwelche Gründen auf das originale 7.59 gebrandete Image für die 7520 zurück. Das geht ohne die Fritzbox abbauen zu müssen über Telnet wenn ihr es aktiviert habt.
Habe dazu ein USB - Stick in FAT32 formartiert mit der Bezeichnung "Fritzflash" mit dem HP Formating Tool.

Spoiler: FRITZFLASH

Du musst Regestriert sein, um das angehängte Bild zusehen.

Steck den Stick in die 7520 und schau im Menü Heimnetz/USB und click auf FRITZFLASH um den Ordner 7-59-7520 hochzuladen. Im Ordner sind 2 Dateien fs.sqfs und kernel.bin

Spoiler: USB-Ordner hochladen

Du musst Regestriert sein, um das angehängte Bild zusehen.

Du musst Regestriert sein, um das angehängte Bild zusehen.

Verbinde dich per Telnet auf die Fritzbox und log dich mit deinem User ein.

Spoiler: Putty-Telnet

Du musst Regestriert sein, um das angehängte Bild zusehen.

Log um Fritzbox zu flashen auf die inaktive Partition. Habe immer nach dem Befehl eine Raute # mit dem Kommentar.

Spoiler: Telnetlog

Fritz!Box user: root
password:


BusyBox v1.36.1 () built-in shell (ash)

ermittle die aktuelle TTY
tty is "/dev/pts/1"
disable start/stop characters and flowcontrol
# cd /var/media/ftp # mit cd zum USB Stick navigieren
# ls # schauen ob unser Stick FRITZFLASH vorhanden ist
Bilder      Dokumente   FRITZ       FRITZFLASH  Musik       Videos
# cd FRITZFLASH # zum Stick navigieren
# ls # Ordner suchen
7-59-7520                  System Volume Information
FRITZ
# cd 7-59-7520 # zum Inhalt vom Ordner
# ls # schauen ob die Dateien vorhanden sind
fs.sqfs     kernel.bin # alles da - es kann los gehen
# cat /proc/mtd # schauen welche partition reserved ist
dev:    size   erasesize  name
mtd0: 00400000 00020000 "reserved-kernel" # da kommt das kernel.bin rein
mtd1: 002c0000 00020000 "urlader"
mtd2: 00840000 00020000 "nand-tffs"
mtd3: 00400000 00020000 "kernel"
mtd4: 06d00000 00020000 "ubi"
mtd5: 02c14000 0001f000 "reserved-filesystem" # da kommt fs.sqfs rein
mtd6: 02c14000 0001f000 "filesystem"
mtd7: 0020f000 0001f000 "config"
mtd8: 00c79000 0001f000 "nand-filesystem"
# update_kernel -i kernel.bin -o /dev/mtd0 # kernel.bin wird auf mtd0 installiert
info 0x0
{mtd_info} type 0x4
{mtd_info} size 0x400000
{mtd_info} erasesize 0x20000
{mtd_info} writesize 0x800
{mtd_info} oobsize 0x40
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[main] eof reached
[main] exit error 0
# update_kernel -i fs.sqfs -o /dev/mtd5 # fs.sqfs wird auf mtd5 installiert
info 0x0
{mtd_info} type 0x7
{mtd_info} size 0x2c14000
{mtd_info} erasesize 0x1f000
{mtd_info} writesize 0x800
{mtd_info} oobsize 0x0
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# cat /proc/sys/urlader/environment | grep linux_fs_start # Hier schauen welche Partition gerade aktiv ist
linux_fs_start  1 # wenn hier 1 aktiv ist, haben wir nach 0 geflasht
# echo "linux_fs_start 0" >/proc/sys/urlader/environment # wir wechsel auf Partition 0
# echo "clear_id 87" > /proc/tffs # Löschen die Meldungen im GUI der Fritzbox weil wir im Telnet aktiv waren
# reboot # warten und es wird die 7520 gestartet mit dem original gebrandete Image 7.59

Spoiler: 7520 Original

Du musst Regestriert sein, um das angehängte Bild zusehen.

Wenn ihr wieder zurück auf das 8.0 modfs für die 7530 wollt, kann das signierte über das Menü installiert werden, da dieses 7520 den key9 hat. Alles andere ist Original und es kein modfs installiert.

Hier der Ordner mit den 2 Dateien. Muss entpackt werden.

https://neutrinobox.de/7-59-7520.zip

Merke dir, nur in mtd 0,3,5,6 darfst du installieren, alles andere ist gefährlich.