Snort mailing list archives

What is the correct syntax for bpf_file?


From: Miguel Alvarez <miguellvrz9 () gmail com>
Date: Tue, 29 Jan 2013 17:38:54 +0100

I have a list of my nessus scanners in my /etc/snort/bpf_file but they're
still triggering alerts.  I've got them listed in the following syntax for
example:

not (src host 10.10.1.1) &&
not (src host 10.10.1.2) &&
not (src host 10.10.1.3)

And my snort process is pointing to it:

/usr/sbin/snort -D -i eth6 -u snort -g snort -c /etc/snort/snort.conf -l
/var/log/snort/eth6 -F /etc/snort/bpf_file

And it shows up in the syslog when snorts starts:

Jan 29 16:15:53 nids1 snort[940]: Reading filter from bpf file:
/etc/snort/bpf_file
Jan 29 16:15:53 nids1 snort[940]: Snort BPF option: not (src host
10.10.1.1) &&
not (src host 10.10.1.2) &&
not (src host 10.10.1.3)

But the alerts keep streaming in (not just this alert):

01/29-16:36:28.235294  [**] [1:2003068:6] ET SCAN Potential SSH Scan
OUTBOUND [**] [Classification: Attempted Information Leak] [Priority: 2]
{TCP} 10.10.1.1:49870 -> 10.10.1.43:22

This is snort 2.9.4.0 on CentOS 5.x.  What am I doing wrong?

Thank you!

MA
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