Re: netfilter: nf_conntrack: log packets dropped by helpers

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On Wednesday 2009-08-26 14:55, Patrick McHardy wrote:

>Pascal Hambourg wrote:
>> Hello,
>> 
>> May I ask what are the reasons for a helper to drop packets ?
>
>Mainly parsing errors, memory allocation errors and bugs.

I am not so quite sure whether parsing errors (like, a port > 65535 for 
FTP) should cause them to be dropped; after all, it might be, for 
example, a vendor-specific form of a protocol that just does not fit the 
nf_conntrack_ftp parsing exactly. That is to say, packets should be let 
through, though without setting up expectations.
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