Re: Synflood filtering and Conntrack

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Hello,

Jan Engelhardt a écrit :
> On Wednesday 2010-07-28 07:24, Mart Frauenlob wrote:
>> 
>> afaik, the (according) ct entries are destroyed on DROP.
> 
> They are not destroyed on DROP, and you can easily check that.

Right, the DROP target has no direct effect on conntrack. When a packet
belonging to an already existing (confirmed) connection is dropped, the
conntrack entry is not destroyed. But IIUC when the first packet that
would create a new connection (and a new conntrack entry) is dropped for
any reason before it reaches the conntrack confirm in the LOCAL_IN or
POST_ROUTING hooks (after INPUT or POSTROUTING chains), the conntrack
entry is destroyed, isn't it ? I guess that is what Mart meant.


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