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====== Information ======

  * [[https://www.netgear.com/support/product/WNDR3800.aspx|NETGEAR WNDR3800]]
  * [[https://openwrt.org|OpenWrt]]
  * [[https://openwrt.org/toh/netgear/wndr3800|OpenWrt Device Page]]
  * [[https://openwrt.org/releases/snapshot|Snapshot]]

====== Snapshot ======

==== Links ====

  * ''ath79''

  * [[https://downloads.openwrt.org/snapshots/targets/ath79/generic/openwrt-ath79-generic-netgear_wndr3800-squashfs-factory.img|factory.bin]]
  * [[https://downloads.openwrt.org/snapshots/targets/ath79/generic/openwrt-ath79-generic-netgear_wndr3800-squashfs-sysupgrade.bin|sysupgrade.bin]]

==== sysupgrade ====

  * 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'

===== Packages =====

  * [[https://openwrt.org/docs/guide-user/luci/luci.essentials|LuCI]] ((snapshot images don't include LuCI, so it needs installed on **every** clean snapshot install))

  ssh 'root'@'192.168.1.1'

  sync && passwd

  opkg update && opkg install luci && sync

====== Wireless AP Mode ======

  * [[https://openwrt.org/docs/guide-user/network/wifi/dumbap|Wireless Access Point / Dumb Access Point / Dumb AP]]

===== Network =====

  * [[https://openwrt.org/docs/guide-user/network/openwrt_as_routerdevice|OpenWrt as router device]]

  * Sets router IP to ''192.168.1.3''
  * Sets router Gateway and DNS to ''192.168.1.1''
  * Disables DHCPv6

<code>
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</code>

===== Services =====

  * Disables ''dnsmasq'', ''firewall'', and ''odhcpd'' services

<code>
/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</code>

====== LuCI ======

  * http://192.168.1.3

===== Scheduled Reboot =====

  * 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

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

===== 1.1.1.1 DNS =====

  * https://1.1.1.1/dns/
  * See [[notes:dns_servers|DNS servers]] for other DNS servers

<code>2606:4700:4700::1111</code>

<code>2606:4700:4700::1001</code>

<code>1.1.1.1</code>

<code>1.0.0.1</code>

===== Wireless =====

==== 2.4GHz ====

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

<code>The Bridge Encampment (2.4GHz)</code>

==== 5GHz ====

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

<code>Overseer's Tower (5GHz)</code>

====== Recovery ======

===== TFTP =====

==== Notes ====

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

==== Image ====

  * 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'

==== TFTP ====

  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

===== nmrpflash =====

==== Images ====

  * :!: If using an OpenWRT image, use the ''factory'' image

  * [[https://downloads.openwrt.org/snapshots/targets/ath79/generic/openwrt-ath79-generic-netgear_wndr3800-squashfs-factory.img|OpenWRT Snapshot]]
  * [[https://downloads.openwrt.org/releases/19.07.6/targets/ath79/generic/openwrt-19.07.6-ath79-generic-netgear_wndr3800-squashfs-factory.img|OpenWRT 19.07.6]]
  * [[https://www.netgear.com/support/product/WNDR3800.aspx#download|NETGEAR Stock Firmware]]

==== nmrpflash ====

  * [[https://github.com/jclehner/nmrpflash|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'