Snort mailing list archives
Re: snort not logging
From: Rob Hughes <rob () robhughes com>
Date: 10 Jun 2002 00:28:52 -0500
On Sun, 2002-06-09 at 11:38, steve nutt wrote:
Rob: Please give an example of the using "snort -c <your config path/file> ". Like this? "/usr/local/aris-sensor/snort -c /usr/local/aris-sensor/snort.conf". When I do this snort initializes but what should I see?
Yes, that's essentially it. The idea is to see if snort is seeing any packets at all. This places snort in sniffer mode and is used as a diagnostics tool.
If I do a snort -vde I do get ARP request, so I am seeing some kind of traffic from the outside interface, but if I do the same thing on the fw box I see everything TCP UDP ICMP and ARP traffic flying bye. The ifconfig for the snort interface is not showing promiscuous mode only Up Running Multicast. When I tail the messsages file when I start snort it says eth0: Promiscuous mode enabled but it does complain about OpenPcap( ) device eth0 network lookup: ^Ieth0: no IPv4 address assigned. There seems to be a conflict.
What version of libpcap do you have? With snort running, the interface should go into promiscuous mode. If it doesn't, the problem isn't snort, but is somewhere with your pcap libraries. Since you say that eth0 promiscuous mode is being enabled, just verify that with a check of ifconfig. Then try running some traffic across the link to see if snort actually picks up the packets. I believe the error about pcap is normal on an interface with no address assigned under linux, but I'm not positive on that. Failing that, do you have tcpdump on the box? Tcpdump opens the interface and listens the same way snort does, so it may be useful to see if one is seeing traffic but not the other.
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Current thread:
- snort not logging steve nutt (Jun 08)
- Re: snort not logging Rob Hughes (Jun 09)
- Re: snort not logging steve nutt (Jun 09)
- Re: snort not logging Rob Hughes (Jun 09)
- Re: snort not logging steve nutt (Jun 09)
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