Since kernels 6.17, support for netfilter legacy tables were disabled
by default [1] but iptables package needs Netfilter legacy tables
support enabled in the kernel when nftables compat is not enabled.
Make sure to enable CONFIG_IP_NF_IPTABLES_LEGACY and
CONFIG_NETFILTER_XTABLES_LEGACY for kernels >= 6.17.
Fixes:
[BRTEST# iptables --flush
modprobe: module ip_tables not found in modules.dep
iptables v1.8.11 (legacy): can't initialize iptables table `filter': Table does not exist (do you need to insmod?)
Perhaps iptables or your kernel needs to be upgraded.
On the other hand, when nftables compat (iptables-nft) is used by
default (BR2_PACKAGE_IPTABLES_NFTABLES_DEFAULT=y) we have to enable
nft protocol support in the kernel.
iptables --version
iptables: Failed to initialize nft: Protocol not supported
Enable CONFIG_NF_TABLES and CONFIG_NF_TABLES_INET as for
NFTABLES_LINUX_CONFIG_FIXUPS and complete the list with
CONFIG_NFT_SOCKET needed to pass the TestIptables with
nftables compat (iptables-nft) enabled.
Without CONFIG_NFT_SOCKET:
iptables --policy INPUT ACCEPT
iptables v1.8.11 (nf_tables): TABLE_ADD failed (Operation not supported): table filter
So, enable kernel support for iptables-legacy only if nftables compat
is not enabled by default. Enable iptables-nft support when nftables
compat is enabled, even if not used by default.
[1] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=9fce66583f06c212e95e4b76dd61d8432ffa56b6
Signed-off-by: Romain Naour <romain.naour@smile.fr>
[Fiona: fix typo in commit message]
Signed-off-by: Fiona Klute <fiona.klute@gmx.de>
c57bcf0d43