Re: Meaning of "." (dot) in netfilter

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On 2021/12/04 01:33, Ross Boylan wrote:
https://wiki.nftables.org/wiki-nftables/index.php/Simple_ruleset_for_a_home_router
include a number of rules like

         ip protocol . th dport vmap { tcp . 22 : accept, udp . 53 :
accept, tcp . 53 : accept, udp . 67 : accept}
with possibly 2 different uses of ".", namely 'ip protocol .'  and 'udp . 67'.
What do those "."'s mean?


Hi Ross,

Nftables uses dot "." (admittedly not the easiest term to search on) to concatenate fields:

https://wiki.nftables.org/wiki-nftables/index.php/Concatenations

Best regards,
Frank




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