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Rpi 6.18.y: Add NETFILTER_XTABLES_LEGACY to the configs to build iptables #7213

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Rpi 6.18.y: Add NETFILTER_XTABLES_LEGACY to the configs to build iptables #7213

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arm: configs: Add NETFILTER_XTABLES_LEGACY to build iptables
6by9 Jan 27, 2026
e8bb118
arm64: configs: Add NETFILTER_XTABLES_LEGACY for legacy iptables
6by9 Jan 27, 2026
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1 change: 1 addition & 0 deletions arch/arm/configs/bcm2709_defconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -163,6 +163,7 @@ CONFIG_NFT_FWD_NETDEV=m
CONFIG_NFT_FIB_NETDEV=m
CONFIG_NF_FLOW_TABLE_INET=m
CONFIG_NF_FLOW_TABLE=m
CONFIG_NETFILTER_XTABLES_LEGACY=y
CONFIG_NETFILTER_XT_SET=m
CONFIG_NETFILTER_XT_TARGET_CHECKSUM=m
CONFIG_NETFILTER_XT_TARGET_CLASSIFY=m
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1 change: 1 addition & 0 deletions arch/arm/configs/bcmrpi_defconfig
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Expand Up @@ -157,6 +157,7 @@ CONFIG_NFT_FWD_NETDEV=m
CONFIG_NFT_FIB_NETDEV=m
CONFIG_NF_FLOW_TABLE_INET=m
CONFIG_NF_FLOW_TABLE=m
CONFIG_NETFILTER_XTABLES_LEGACY=y
CONFIG_NETFILTER_XT_SET=m
CONFIG_NETFILTER_XT_TARGET_CHECKSUM=m
CONFIG_NETFILTER_XT_TARGET_CLASSIFY=m
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1 change: 1 addition & 0 deletions arch/arm64/configs/bcm2711_defconfig
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Expand Up @@ -185,6 +185,7 @@ CONFIG_NFT_FIB_NETDEV=m
CONFIG_NF_FLOW_TABLE_INET=m
CONFIG_NF_FLOW_TABLE=m
CONFIG_NETFILTER_XTABLES_COMPAT=y
CONFIG_NETFILTER_XTABLES_LEGACY=y
CONFIG_NETFILTER_XT_SET=m
CONFIG_NETFILTER_XT_TARGET_CHECKSUM=m
CONFIG_NETFILTER_XT_TARGET_CLASSIFY=m
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1 change: 1 addition & 0 deletions arch/arm64/configs/bcm2711_rt_defconfig
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Expand Up @@ -185,6 +185,7 @@ CONFIG_NFT_FIB_NETDEV=m
CONFIG_NF_FLOW_TABLE_INET=m
CONFIG_NF_FLOW_TABLE=m
CONFIG_NETFILTER_XTABLES_COMPAT=y
CONFIG_NETFILTER_XTABLES_LEGACY=y
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@HiassofT HiassofT Jan 27, 2026

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This is a no-op, NETFILTER_XTABLES_LEGACY isn't compatible with PREEMPT_RT

https://github.com/raspberrypi/linux/blob/rpi-6.18.y/net/netfilter/Kconfig#L761-L769

config NETFILTER_XTABLES_LEGACY
	bool "Netfilter legacy tables support"
	depends on !PREEMPT_RT
	help
	  Say Y here if you still require support for legacy tables. This is
	  required by the legacy tools (iptables-legacy) and is not needed if
	  you use iptables over nftables (iptables-nft).
	  Legacy support is not limited to IP, it also includes EBTABLES and
	  ARPTABLES.

CONFIG_NETFILTER_XT_SET=m
CONFIG_NETFILTER_XT_TARGET_CHECKSUM=m
CONFIG_NETFILTER_XT_TARGET_CLASSIFY=m
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1 change: 1 addition & 0 deletions arch/arm64/configs/bcm2712_defconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -188,6 +188,7 @@ CONFIG_NFT_FIB_NETDEV=m
CONFIG_NF_FLOW_TABLE_INET=m
CONFIG_NF_FLOW_TABLE=m
CONFIG_NETFILTER_XTABLES_COMPAT=y
CONFIG_NETFILTER_XTABLES_LEGACY=y
CONFIG_NETFILTER_XT_SET=m
CONFIG_NETFILTER_XT_TARGET_CHECKSUM=m
CONFIG_NETFILTER_XT_TARGET_CLASSIFY=m
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