内核编译-NAT转发

make menuconfig
make ARCH=arm menuconfig

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[*] Networking support --->
Networking options --->
[*] Network packet filtering framework (Netfilter) --->
Core Netfilter Configuration --->
<*> Netfilter connection tracking support
<*> NetBIOS name service protocol support
-*- Netfilter Xtables support (required for ip_tables)
IP: Netfilter Configuration --->
<*> IPv4 connection tracking support (required for NAT)
<*> IP tables support (required for filtering/masq/NAT)
<*> iptables NAT support
<*> MASQUERADE target support
<*> REDIRECT target support