Hello, I need to filter packets in the industrial network, where there are some specific protocols encapsulated in tcp (though some of them might be on another layer). For example modbus. Nftables greatly suits my needs when writing rules for tcp/ip stack, but there are no support of industrial protocols in nftables. On that link http://wiki.nftables.org/wiki-nftables/index.php/Main_differences_with_iptables is said that there is some "relatively easy" way to add custom protocol support in userspace. However, after some searching I have not found that. So, how could I implement it? -- To unsubscribe from this list: send the line "unsubscribe netfilter" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
