was trying to configure ufw on a UdooNeo running UDOObuntu 2.2.0 Code: sudo ufw allow to any app openssh and got Code: ERROR: initcaps [Errno 2] modprobe: FATAL: Module ip6_tables not found. ip6tables v1.4.21: can't initialize ip6tables table `filter': No chain/target/match by that name Perhaps ip6tables or your kernel needs to be upgraded. so tried Code: sudo ip6tables -L and got Code: modprobe: FATAL: Module ip6_tables not found. ip6tables v1.4.21: can't initialize ip6tables table `filter': No chain/target/match by that name Perhaps ip6tables or your kernel needs to be upgraded. which to me looks like the kernel module(s) for ipv6 iptables is missing im not familiar with recompiling the kernel so can anyone tell me what i have to do to fix this? also im not sure how wise it it to have ipv6 support without support for an ipv6 capable firewall edit 1 have found https://www.udoo.org/docs-neo/Advanced_Topics/Compile_Linux_Kernel.html however gcc-arm-linux-gnueabihf appears available from udoobuntu default repositories Code: Package gcc-arm-linux-gnueabihf is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package 'gcc-arm-linux-gnueabihf' has no installation candidate
Perhaps you could try Armbian. Building kernel or image is super easy - you only need to setup Ubuntu Xenial X64 virtual machine, run on it or under Docker ... https://github.com/armbian/build does everything for you.
using ubuntu and those instructions successfully compiled the kernel (might try armbian in future) using a vm with ubuntu 16.04 LTS need to use ARCH=arm make menuconfig to add correct modules found tool for ufw to test for right modules /usr/share/ufw/check-requirements and now appear to have a functional configuration where ufw enables and allows OpenSSH have attached .config file for anyone interested
