OpenWRT 22 and 23 Support

[krispstack]

Hi

How to do setup in openwrt 22 and 23

Thanks

[DanielG]

What are you trying to do? OpenWrt already has a fully integrated (kernel module based) CLAT called nat46(https://openwrt.org/packages/pkgdata_owrt18_6/kmod-nat46). IMO a misnormer but here we are :)
https://github.com/openwrt/openwrt/blob/ea609fe486a99af6540dcc7a18f0827481d0c4b0/package/kernel/nat46/Makefile

It may be able to do things other than CLAT it's not very well documented unfortunately.

[krispstack]

Hi @DanielG ,
I have a OpenWRT based Board(MT7688), It uses pppd to connect to 4G LTE internet, the operator provides only IPV6, it is not allowing any IPv4 trafic.

[DanielG]

Then opkg install kmod-nat46 and it should Just_Work^TM but I've never tested it myself.

[vitlabuda]

Hi,
since recent versions of OpenWRT have moved on from using iptables to netfilter, the way of setting up firewall rules for Tundra is different from the one mentioned in the tutorial. If I ever get my hands on a device running OpenWRT 22/23, I will update the tutorial or write a new one.

Also, the going the kmod-nat46 way, as Daniel suggested, may also work, but I have never used it as well.
-- Vít

[DanielG]

FYI: You can just boot up one of the x86 images for testing: https://downloads.openwrt.org/releases/23.05.3/targets/x86/generic/openwrt-23.05.3-x86-generic-generic-ext4-combined.img

Something like this is what worked last I did this:

$ qemu-system-x86_64 -m 128M -M q35 -nographic -nic user,model=e1000,hostfwd=tcp:127.0.0.1:2222-:22,hostfwd=tcp:127.0.0.1:8888-:80 -nic user,model=e1000 -hda openwrt-23.05.3-x86-generic-generic-ext4-combined.img