Snort mailing list archives
conf/rules problems
From: "Aaron McKinnon" <aaron () fullerene com>
Date: Wed, 23 May 2001 10:40:14 -0700
Trying to filter out false positives for DNS Servers and a few local boxes that are chatty. I had it working for a while, moved snort off that box and put it on a stand alone box. Mirrored all the traffic to the new boxes port and put the NIC in promiscuous mode... I'm now logging all kinds of false positives from the DNS servers and local Win 2000 boxes. For example, this is an item I would like NOT to see: [**] ICMP Echo Reply [**] 05/22-04:06:32.226477 208.158.118.100 -> 208.158.118.150 ICMP TTL:128 TOS:0x0 ID:32502 IpLen:20 DgmLen:84 Type:0 Code:0 ID:57209 Seq:0 ECHO REPLY [Snort log] I will list below all my relevant config files and custom rules set stuff(s): *How snort is being called: /usr/sbin/snort -Afull -o -u snort -g snort -d -D -l /var/log/snort -c /etc/snort/snort.conf ------------------------------------ *snort.conf excerpts: var HOME_NET [208.158.118.0/24,208.158.118.108/32,208.158.118.150/32,208.158.118.3/32,208 .158.118.4/32, 208.158.118.5/32] #I know there is some redundancy here... Just trying to make something go... anything. var DNS_SERVERS [209.196.128.11/32,209.196.128.12/32,209.196.128.13/32,209.196.128.14/32,208 .158.118.15 0/32] preprocessor portscan-ignorehosts: $DNS_SERVERS (should be all that is relevant from snort.conf) ------------------------------------ *local.rules file complete (local.rules is uncommented from snort.conf) pass tcp 208.158.118.0/24 any > 208.158.118.0/24 any pass udp 208.158.118.0/24 any > 208.158.118.0/24 any pass icmp 208.158.118.0/24 any > 208.158.118.0/24 any pass tcp 209.196.150.82/32 any > 208.158.118.0/24 any pass udp 209.196.150.82/32 any > 208.158.118.0/24 any pass icmp 209.196.150.82/32 any > 208.158.118.0/24 any pass tcp 209.196.128.13/32 53 > 208.158.118.0/24 any pass tcp 209.196.128.12/32 53 > 208.158.118.0/24 any ------------------------------------- Thanks for any and all help in advance. ----------------------------------- Aaron McKinnon System Administrator Fullerene Productions, Inc. 3250 Wilshire Blvd. Suite 2000 Los Angeles, CA 90010 213.365.1692 ----------------------------------- _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: http://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://www.geocrawler.com/redir-sf.php3?list=snort-users
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- conf/rules problems Aaron McKinnon (May 23)