From: "Marek Küthe" <m-k-mailling-list@mk16.de>
To: netfilter@vger.kernel.org
Subject: IPv4 Evil Bit
Date: Wed, 7 Jun 2023 13:17:43 +0200 [thread overview]
Message-ID: <20230607131743.309d5aff@parrot> (raw)
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Hello,
I hope I am in the right place. I have two questions about nftables:
1) Is it possible to perform OR operations in nftables? For example
`ip6 saddr ::/128 OR ip saddr 127.0.0.1/8 accept;` As far as I
understand it, everything else is concatenated with AND.
2) I want to see how many IPv4 packets I can get with the Evil Bit
(RFC3514). Since there seems to be no native function for this in
nftables, I seem to have to use raw payload expression. So I have
set up the following:
@th,6,1 & 0x80 = 0x80 \
log prefix "[nftables] Evil bit: " counter reject;
However, `Error: syntax error, unexpected '='` appears. What is the
reason for this? How can I formulate this expression correctly?
I would really appreciate your answers!
Greetings
Marek Küthe
--
Marek Küthe
m.k@mk16.de
er/ihm he/him
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next reply other threads:[~2023-06-07 11:17 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-07 11:17 Marek Küthe [this message]
2023-06-07 13:30 ` IPv4 Evil Bit Kerin Millar
2023-06-08 7:51 ` Marek Küthe
2023-06-08 8:03 ` Florian Westphal
2023-06-07 14:38 ` Paul Robert Marino
2023-06-08 7:58 ` Marek Küthe
2023-06-08 8:07 ` Kerin Millar
2023-06-08 9:56 ` Paul Robert Marino
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