From: Martin Bednar <martin@serafean.cz>
To: Pablo Neira Ayuso <pablo@netfilter.org>
Cc: netfilter@vger.kernel.org
Subject: Re: nftables vmap concatenations with interval
Date: Wed, 28 Sep 2016 14:51:50 +0200 [thread overview]
Message-ID: <6538549.qvO97AaWzG@nemmerle> (raw)
In-Reply-To: <20160927191101.GA3195@salvia>
Le Tuesday, September 27, 2016 9:11:01 PM CEST Pablo Neira Ayuso a écrit :
>
> nft add table inet filter
> nft add map inet filter mymap { type ipv4_addr . iface_index : verdict \; }
> nft add element inet filter mymap { 172.18.0.0 . eth0 : accept }
> nft add rule inet filter forward ip saddr and 255.255.255.0 . iif vmap
> @mymap ^^^^^^^^^^^^^^^^^^^^^^^^^^
>
> The idea here is to mask the address, then add to the set the result
> of this operation, thus, 172.18.0.0
Very cool trick... Thanks. this solves 90% of what I want :)
This however implies the same mask for all networks, right?
Is is somehow possible to have one vmap for networks with different masks?
Thanks.
prev parent reply other threads:[~2016-09-28 12:51 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-27 15:10 nftables vmap concatenations with interval Martin Bednar
2016-09-27 19:11 ` Pablo Neira Ayuso
2016-09-28 12:51 ` Martin Bednar [this message]
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