• NETGEAR WNDR3800
• OpenWrt
• OpenWrt Device Page
• Snapshot

• ath79

• factory.bin
• sysupgrade.bin

• This downloads the latest sysupgrade.bin and installs it

ssh 'root'@'192.168.1.1'

rm -f '/tmp/sysupgrade.img' && sync && sysupgrade --force -n -v 'https://downloads.openwrt.org/snapshots/targets/ath79/generic/openwrt-ath79-generic-netgear_wndr3800-squashfs-sysupgrade.bin'

rm -Rf ~/'.ssh' && ping '192.168.1.1'

• LuCI ¹⁾

ssh 'root'@'192.168.1.1'

sync && passwd

opkg update && opkg install luci && sync

• Wireless Access Point / Dumb Access Point / Dumb AP

• OpenWrt as router device

• Sets router IP to 192.168.1.3
• Sets router Gateway and DNS to 192.168.1.1
• Disables DHCPv6

uci set network.lan.ipaddr=192.168.1.3 && uci set network.lan.gateway=192.168.1.1 && uci set network.lan.dns=192.168.1.1 && uci set dhcp.lan.dhcpv6=disabled && uci set dhcp.lan.ra=disabled && uci commit && service network restart && sync

• Disables dnsmasq, firewall, and odhcpd services

/etc/init.d/dnsmasq disable && /etc/init.d/dnsmasq stop && /etc/init.d/firewall disable && /etc/init.d/firewall stop && /etc/init.d/odhcpd disable && /etc/init.d/odhcpd stop && /etc/init.d/network reload && sync

• http://192.168.1.3

• https://www.albertogonzalez.net/how-to-reboot-nightly-your-openwrt-router/
• https://openwrt.org/docs/guide-user/base-system/cron#periodic_reboot

• http://192.168.1.3/cgi-bin/luci/admin/system/crontab

# Restart 3:36 AM
36 3 * * * sleep 70 && touch /etc/banner && reboot

• https://1.1.1.1/dns/
• See DNS servers for other DNS servers

2606:4700:4700::1111

2606:4700:4700::1001

1.1.1.1

1.0.0.1

• Country Code: US
• Channel: 1
• Width: 40 MHz
• Encryption: WPA2-PSK CCMP AES

The Bridge Encampment (2.4GHz)

• Country Code: US
• Channel: Auto or 36
• Width: 40 MHz
• Encryption: WPA2-PSK CCMP AES

Overseer's Tower (5GHz)

• Can seemingly still use tftp even if you can't ping the router

• Pick one
• The stable image URL will need updated if there's a newer version available

wget -O ~/'f.img' 'https://downloads.openwrt.org/releases/19.07.6/targets/ath79/generic/openwrt-19.07.6-ath79-generic-netgear_wndr3800-squashfs-factory.img'

wget -O ~/'f.img' 'https://downloads.openwrt.org/snapshots/targets/ath79/generic/openwrt-ath79-generic-netgear_wndr3800-squashfs-factory.img'

sudo dnf install 'tftp' -y && sync

tftp

verbose

trace

rexmt 1

binary

connect 192.168.1.1

put f.img

sudo dnf remove 'tftp' -y && sync

• If using an OpenWRT image, use the factory image

• OpenWRT Snapshot
• OpenWRT 19.07.6
• NETGEAR Stock Firmware

• jclehner/nmrpflash GitHub
• Reason for the libpcap command: https://github.com/jclehner/nmrpflash/issues/27

sudo ln -sv 'libpcap.so.1' '/usr/lib64/libpcap.so.0.8'

sudo ~/'Downloads/nmrpflash-0.9.15-linux/nmrpflash' -L

sudo ~/'Downloads/nmrpflash-0.9.15-linux/nmrpflash' -i 'enp5s0' -f ~/'Downloads/openwrt-ath79-generic-netgear_wndr3800-squashfs-factory.img'

sudo ~/'Downloads/nmrpflash-0.9.15-linux/nmrpflash' -i 'enp5s0' -f ~/'Downloads/openwrt-19.07.6-ath79-generic-netgear_wndr3800-squashfs-factory.img'

sudo ~/'Downloads/nmrpflash-0.9.15-linux/nmrpflash' -i 'enp5s0' -f ~/'Downloads/WNDR3800-V1.0.0.52/WNDR3800-V1.0.0.52.img'