[Snort-users] snort behind firewall ??

centipede centiped at ...1832...
Fri Apr 27 07:14:26 EDT 2001


Can ya elaborate on this one ?  where does the libpcap hooks itself, 
exactly ?

Thanks, centipede.

Steve Halligan wrote:

> a ppp0 int is at layer2...so ipchains will block it and snort wont see it.
> If you had a ethernet int on the outside, pcap would be able to see the
> packets before ipchains blocked it.
> 
>> Don't know, guys, really.
>> I run snort on the same linux machine I use ipchains.
>> I configured it to serve and protect my ppp0 interface.
>> Until today, it has alerted me of nothing but an ICMP scan, thanks to 
>> ipchains.
>> The moment I remove ipchains, snort usually begins its barking.
>> And of course I heavily tested it with self initiated scannings.
>> My conclusion, and of course your remarks are more than 
>> welcomed, is that
>> 
>> snort  DO  NOT   see packets blocked by ipchains.
>> 
> 
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