Re: UDP Scan detection with xtables-addon psd

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On Thursday 2011-08-11 16:32, andreas wrote:

>On 08/11/2011 03:54 PM, Jan Engelhardt wrote:
>>> On Thursday 2011-08-11 12:16, andreas wrote:
>>> 
>>>>> Hi,
>>>>> 
>>>>> But i can't get psd to detect nmap UDP scans. 15:08 < norg>
>>>>> xv7: it's the commit adabd647b1d0421f961b5cc3808128001facb9bd
>>> 
>>> Oh yeah, that is strikingly obvious. Fixed in commit
>>> v1.37-5-g6c17eb4 (psd branch).
>>> 
>
>Is working now with nmap -sU scans. Thanks.
>Also Thanks for the further informations.
>
>So still one question open. What is the reason, that ACK Scans aren't
>detected (with nmap -sA $IP)?

They should be classified as -m conntrack --ctstate INVALID, since they 
won't match anything preexisting.

Assuming this is not the case (e.g. due to liberal pickup of 
connections, see a similarly named sysctl), how else would you determine 
that they are not real?
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