Re: Is it possible to change a chains default policy when rules are already present?

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Le 14/08/2020 à 13:36, Reindl Harald a écrit :

Am 14.08.20 um 13:21 schrieb Daniel:
Le 14/08/2020 à 13:07, Pablo Neira Ayuso a écrit :
On Thu, Aug 13, 2020 at 12:28:34PM +0000, Andreas Hoefler wrote:
Hi

I have a chain with default policy drop.
I would like to first have the default policy set to accept, then add
rules and later change it to drop.
Is this possible?
For the record:

   nft add chain x y { policy accept\; }

Assuming an existing basechain 'y'. The backlash (\) before the
semicolon is there in case of invoking this from bash.
 From bash how to you set priority leaded by - like priority -150 \; We
always get invalid option

dh@peech:~$ sudo nft add chain ip6 mangle output { type nat hook
prerouting priority -350 \; policy accept \; }
nft: invalid option -- '3'
because you don't escape - with \-
I already tested by escaping - sign, same error
don't nft understand quoted params?

nft add chain ip6 mangle output "{ type nat hook prerouting priority
-350 ; policy accept ; }"
Not working either

dh@peech:~$ sudo nft add chain ip6 mangle prerouting "{ type nat hook prerouting priority -350 ; policy accept ; }"
Error: Could not process rule: Operation not supported
add chain ip6 mangle prerouting { type nat hook prerouting priority -350; policy accept; }
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

--
Daniel Huhardeaux
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