Inhaltsverzeichnis

OpenWrt

Derivate

Erweiterungen

Pakete installieren

opkg install PAKET

Pakete auflisten: 

opkg list

Tips & Tricks

Debrick

https://wiki.openwrt.org/doc/howto/generic.debrick

Beispiel: TP-Link Archer C50 v3

Hintergrund:

The stock firware (3.13.33(130617)) features a TFTP recovery client in bootloader. To activate it press and hold WPS/Reset Button during powering on until WPS LED turns on. Connect computer to LAN1. Using tcpdump, you should see ARP requests from router having address 192.168.0.86 looking for address 192.168.0.66. 

# tcpdump -ni eth0 arp
ARP, Request who-has 192.168.0.66 tell 192.168.0.86, length 46

Set up your computer to address 192.168.0.66, netmask /24 (255.255.255.0). 

# ip addr add dev eth0 192.168.0.66/24

Using TCPdump, you should now see request for new firmware image: 

# tcpdump -npi eth0 udp
IP 192.168.0.86.2195 > 192.168.0.66.69:  44 RRQ "wdr4300v1_tp_recovery.bin" octet timeout 5
**TFTP-Server**

Vorgehen:

Download Recovery: https://static.tp-link.com/Archer%20C50(EU)_V3_170608.zip

Wichtig! Nach dem Entpacken das bin-File preparieren („To prepare recovery file cut the first 0x200 (that is 512) Bytes from original firmware (This cut only header of firmware, Recovery need bootloader and firmware)“) 

dd if=Archer_C50v3_EU_0.9.1_0.4_up_boot\[170608-rel35472\].bin of=tp_recovery.bin skip=1 bs=512

Grundsätzliche Vorgehensweise:

  1. Setup your computer to 192.168.0.66 (SubnetMask /24 = 255.255.255.0) and connect it to LAN1.
  2. Start TFTP server and provide recovery file with it.
  3. To activate TFTP Recovery press and hold WPS/Reset Button during powering (8 sec.) on until WPS LED turns on.

TFTP-Server installieren 

apt install atftpd

Create directory where you want to put the image file 

mkdir /srv/tftp

Put an image file into your directory 

cp ~/tp_recovery.bin /srv/tftp

Change the ownership of the folder and the file in it 

chown nobody:nogroup -R /srv/tftp

Run TFTP server 

atftpd --daemon /srv/tftp

Check if your server is listening 

netstat -lunp|grep 69

Evtl. verhindert rlinetd das sraten, da er auf dem gleichen Port lauscht, dann hilft: 

/etc/init.d/rlinetd stop

Check that you can in fact pull the file from your tftp server 

$ tftp 192.168.0.66
tftp> get tp_recovery.bin
Received 8152633 bytes in 0.8 seconds
tftp> quit

Siehe auch