• NETGEAR R6260
• OpenWrt
• OpenWrt Device Page
• Snapshot
• https://github.com/openwrt/openwrt/commits/main/target/linux/ramips/mt7621

• ramips/mt7621

• Stock firmware reports d(149)+p(153)+d(157)+d(161) for 5GHz channels with 153 selected and 11(P)+7(S) for 2.4GHz with 11 selected
• 2026: OpenWRT had slightly higher LAN pings than DD-WRT ¹⁾

• https://downloads.openwrt.org/snapshots/targets/ramips/mt7621/
• factory.bin
• sysupgrade.bin

• Settings

ssh -o "StrictHostKeyChecking='no'" -o "UserKnownHostsFile='/dev/null'" 'root'@'192.168.1.1'

rm -fv '/tmp/sysupgrade.img' && sync && sysupgrade --force -n -p -v 'https://downloads.openwrt.org/snapshots/targets/ramips/mt7621/openwrt-ramips-mt7621-netgear_r6260-squashfs-sysupgrade.bin'

ping '192.168.1.1'

ssh -o "StrictHostKeyChecking='no'" -o "UserKnownHostsFile='/dev/null'" 'root'@'192.168.1.1'

sync && passwd

apk update && apk add 'luci' && sync

"%SystemRoot%\System32\OpenSSH\ssh.exe" -o "StrictHostKeyChecking='no'" -o "UserKnownHostsFile='NUL'" "root"@"192.168.1.1"

rm -f '/tmp/sysupgrade.img' && sync && sysupgrade --force -n -p -v 'https://downloads.openwrt.org/snapshots/targets/ramips/mt7621/openwrt-ramips-mt7621-netgear_r6260-squashfs-sysupgrade.bin'

"%SystemRoot%\System32\PING.EXE" -t "192.168.1.1"

"%SystemRoot%\System32\OpenSSH\ssh.exe" -o "StrictHostKeyChecking='no'" -o "UserKnownHostsFile='NUL'" "root"@"192.168.1.1"

sync && passwd

apk update && apk add 'luci' && sync

• https://github.com/PowerShell/Win32-OpenSSH

"%SystemRoot%\System32\curl.exe" --output "%UserProfile%\Downloads\OpenSSH-Win64.zip" --location "https://github.com/PowerShell/Win32-OpenSSH/releases/latest/download/OpenSSH-Win64.zip" --progress-bar && RMDIR /S /Q "%UserProfile%\Downloads\OpenSSH-Win64" & "%SystemRoot%\System32\tar.exe" xf "%UserProfile%\Downloads\OpenSSH-Win64.zip" -C "%UserProfile%\Downloads" && "%UserProfile%\Downloads\OpenSSH-Win64\ssh.exe" -o "StrictHostKeyChecking='no'" -o "UserKnownHostsFile='NUL'" "root"@"192.168.1.1"

"%UserProfile%\Downloads\OpenSSH-Win64\ssh.exe" -o "StrictHostKeyChecking='no'" -o "UserKnownHostsFile='NUL'" "root"@"192.168.1.1"

• https://openwrt.org/docs/guide-user/luci/luci.essentials

apk update && apk add 'luci' && sync

• http://192.168.1.1/cgi-bin/luci/admin/system/admin/dropbear

• https://openwrt.org/docs/guide-user/base-system/cron#periodic_reboot
• http://192.168.1.1/cgi-bin/luci/admin/system/crontab
• Daily 02:45:28 AM ²⁾

# Restart 2:45:28 AM
45 2 * * * '/bin/sleep' '28s' && '/bin/touch' '/etc/banner' && '/sbin/reboot'

# End

• More DNS Servers
• lan → DHCP Server → IPv4 Settings → Limit: 48

2606:4700:4700::1112

2606:4700:4700::1002

1.1.1.2

1.0.0.2

• TCP
• TODO: QUIC

HTTP

80

HTTPS

443

• Prosody
• TCP

XMPP c2S

5222

XMPP s2s

5269

• Firewall → Traffic Rules

• Protocol: Any
• Source zone: Any zone (forward)
• Destination zone: wan: wan6:
• Action: drop

• Source MAC address: (devices)

• Back to NETGEAR stock firmware
• Can also initial-flash OpenWRT

• https://github.com/jclehner/nmrpflash

• Reason for the libpcap command: https://github.com/jclehner/nmrpflash/issues/27
• Use factory for OpenWRT image (not sysupgrade)

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

sudo ~/'Downloads/nmrpflash-0.9.16-linux/nmrpflash' -L

sudo ~/'Downloads/nmrpflash-0.9.16-linux/nmrpflash' -i 'enp6s0' -f ~/'Downloads/openwrt-ramips-mt7621-netgear_r6260-squashfs-factory.img'

sudo ~/'Downloads/nmrpflash-0.9.16-linux/nmrpflash' -i 'enp6s0' -f ~/'Downloads/R6260-V1.1.0.84_1.0.1/R6260-V1.1.0.84_1.0.1.img'

sudo ~/'Downloads/nmrpflash-0.9.25-linux-x86_64/nmrpflash' -L

sudo ~/'Downloads/nmrpflash' -a '192.168.1.1' -f ~/'Downloads/openwrt-ramips-mt7621-netgear_r6260-squashfs-factory.img' -i 'eno1' -R 'NA' -v

• https://npcap.com/#download
• Last tested: npcap-1.83.exe

• [x] Install Npcap in WinPcap API-compatible Mode

• https://github.com/jclehner/nmrpflash/releases
• Last tested: nmrpflash-0.9.25-win32.zip

• https://www.netgear.com/support/product/r6260/#download
• https://kb.netgear.com/000064951/R6260-Firmware-Version-1-1-0-88
• Last tested: R6260-V1.1.0.88.zip

• Post-flash URL: http://192.168.1.1/BRS_index.htm

"%UserProfile%\Downloads\nmrpflash-0.9.25-win32\nmrpflash.exe" -L

"%UserProfile%\Downloads\nmrpflash-0.9.25-win32\nmrpflash.exe" -a "192.168.1.1" -f "%UserProfile%\Downloads\R6260-V1.1.1.88\R6260-V1.1.1.88_1.0.1.img" -i "net7" -M "255.255.255.0" -R "NA" -v

'/usr/sbin/ethtool' --pause 'eth0' 'rx' 'off' 'tx' 'off'
'/usr/sbin/ethtool' --pause 'wan' 'rx' 'off' 'tx' 'off'
'/usr/sbin/ethtool' --pause 'lan4' 'rx' 'off' 'tx' 'off'
'/usr/sbin/ethtool' --pause 'lan3' 'rx' 'off' 'tx' 'off'
'/usr/sbin/ethtool' --pause 'lan2' 'rx' 'off' 'tx' 'off'
'/usr/sbin/ethtool' --pause 'lan1' 'rx' 'off' 'tx' 'off'

ethtool -s eth0 speed 1000 duplex full autoneg off

ethtool -K eth0 tso off

• https://npcap.com/#download
• Last tested: npcap-1.88.exe

• [ ] Restrict Npcap driver's access to Administrators only
• [ ] Support raw 802.11 traffic (and monitor mode) for wireless adapters
• [x] Install Npcap in WinPcap API-compatible Mode

• https://github.com/jclehner/nmrpflash
• https://github.com/jclehner/nmrpflash/releases
• Last tested: nmrpflash-0.9.27-win32.zip

MOVE /Y "%UserProfile%\Downloads\nmrpflash-"*"-win32.zip" "%UserProfile%\Downloads\nmrpflash-win32.zip" & "%SystemRoot%\System32\tar.exe" -xf "%UserProfile%\Downloads\nmrpflash-win32.zip" -C "%UserProfile%\Downloads" "nmrpflash.exe" && DIR /B "%UserProfile%\Downloads\nmrpflash.exe"

• https://www.netgear.com/support/product/r6260
• Last tested: R6260-V1.1.1.88.zip

MOVE /Y "%UserProfile%\Downloads\R6260-V"*".zip" "%UserProfile%\Downloads\R6260-NETGEAR.zip" & "%SystemRoot%\System32\tar.exe" -xf "%UserProfile%\Downloads\R6260-NETGEAR.zip" -C "%UserProfile%\Downloads" "R6260-V"*".img" && MOVE /Y "%UserProfile%\Downloads\R6260-V"*".img" "%UserProfile%\Downloads\R6260-NETGEAR.img" && DIR /B "%UserProfile%\Downloads\R6260-NETGEAR.img" & DEL /Q "%UserProfile%\Downloads\R6260-NETGEAR.zip"

"%UserProfile%\Downloads\nmrpflash.exe" -L

"%UserProfile%\Downloads\nmrpflash.exe" -a "192.168.1.1" -M "255.255.255.0" -R "NA" -i "eth4" -f "%UserProfile%\Downloads\R6260-NETGEAR.img" -v

"%SystemRoot%\System32\PING.EXE" -t "192.168.1.1"

"%SystemRoot%\System32\curl.exe" --output "%UserProfile%\Downloads\openwrt-ramips-mt7621-netgear_r6260-squashfs-factory.img" --location "https://downloads.openwrt.org/snapshots/targets/ramips/mt7621/openwrt-ramips-mt7621-netgear_r6260-squashfs-factory.img" --progress-bar && DIR /B "%UserProfile%\Downloads\openwrt-ramips-mt7621-netgear_r6260-squashfs-factory.img"

"%UserProfile%\Downloads\nmrpflash.exe" -L

"%UserProfile%\Downloads\nmrpflash.exe" -i "eth4" -f "%UserProfile%\Downloads\openwrt-ramips-mt7621-netgear_r6260-squashfs-factory.img" -v

"%SystemRoot%\System32\PING.EXE" -t "192.168.1.1"

• TODO