• NETGEAR R6260
• OpenWrt
• OpenWrt Device Page
• Snapshot

• 2021/04/28: Dropping invalid packets (firewall) causes an Oculus Quest 2 to not load it's own store/home page
• 2021/06/14: Enabling Use broadcast flag causes WAN not to work (Comcast/Xfinity)
• 2021/06/29: Enabling 802.11w Management Frame Protection on 2.4GHz caused a NC200 to not be able to connect
• 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
• Both Software and Hardware Flow Offload is broken with IPv6 as reported here and here
• https://forum.openwrt.org/t/mt7621-21-02-master-feedback-firmware-image-test-ipv6-offload-and-disabled-flow-control/115697

• ramips/mt7621

• 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/ramips/mt7621/openwrt-ramips-mt7621-netgear_r6260-squashfs-sysupgrade.bin'

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

del %UserProfile%"\.ssh\known_hosts" && ping -t "192.168.1.1"

• LuCI ¹⁾

ssh root@192.168.1.1

sync && passwd

opkg update && opkg install luci irqbalance nano && sync

• https://openwrt.org/docs/guide-user/services/irqbalance

nano '/etc/config/irqbalance'

• http://192.168.1.1

• This advertises an upstream DNS server directly to clients instead of the router
• https://1.1.1.1/dns/
• See DNS servers for other DNS servers

• Network → Interfaces → LAN → DHCP Server → Advanced Settings → DHCP-Options
• The 6, is intentional ²⁾

6,1.1.1.1,1.0.0.1

• Network → Interfaces → LAN → DHCP Server → Advanced Settings → IPv6 Settings → Announced IPv6 DNS servers

2606:4700:4700::1111

2606:4700:4700::1001

6,1.1.1.1,1.0.0.1

2606:4700:4700::1111

2606:4700:4700::1001

1.1.1.1

1.0.0.1

• Country Code: US
• Channel: 11
• Width: 20 MHz
• Encryption: WPA2-PSK CCMP AES

The Crossroads (2.4GHz)

• Country Code: US
• Channel: 149
• Width: 80 MHz
• Encryption: WPA2-PSK CCMP AES

Highgate (5GHz)

• Oak

HTTP

80

HTTPS

443

• Steam Support

Steam Remote Play (UDP)

27031

27036

Steam Remote Play (TCP)

27036

27037

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

• Reason for the libpcap command: https://github.com/jclehner/nmrpflash/issues/27
• If using an OpenWRT image, use the factory image

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'