Snort mailing list archives
RE: When does snort/ACID do DNS lookups
From: "Truax, Shawn (MBS)" <Shawn.Truax () mbs gov on ca>
Date: Fri, 4 Jun 2004 09:26:36 -0400
Hi Dave, The other responses have covered off the high level info you need. If you want the techie stuff go into your acid_conf.php file and there is a section half way in for all your DNS settings. You can turn resolve on or off and set cache lifetime options. If your DNS change weekly for example set your cache variables to a week or less and they will refresh themselves for you. Shawn Truax Security Specialist Corporate Security 155 University Ave. Toronto, Ontario M5H 3B7 (416)327-1107 -----Original Message----- From: Humes, David G. [mailto:David.Humes () jhuapl edu] Sent: June 3, 2004 3:12 PM To: 'snort-users () lists sourceforge net' Subject: [Snort-users] When does snort/ACID do DNS lookups I'm looking at a series of alerts in ACID that clearly have the wrong hostname associated with the source IP. The host in question is on a DHCP subnet, and it did get a new lease recently. But alerts continue to be logged that show an old hostname. dig/nslookup on the sensor/database machine return the correct hostname. Since I'm seeing the old hostname associated with new alerts coming into the database, it would seem that it's not doing DNS lookups when the records are viewed. So, then it would seem that it must be doing the lookups when the database receives the alerts from snort. But, that doesn't seem right either since manual lookups on the sensor/database host return the correct hostname. It appears almost as though something has cached the mapping. The sensor/database host is not running client name service caching daemon. Any thoughts? Thanks. --Dave ------------------------------------------------------- This SF.Net email is sponsored by the new InstallShield X.
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Current thread:
- When does snort/ACID do DNS lookups Humes, David G. (Jun 03)
- RE: When does snort/ACID do DNS lookups Adriel T. Desautels (Jun 03)
- RE: When does snort/ACID do DNS lookups todb (Jun 03)
- <Possible follow-ups>
- RE: When does snort/ACID do DNS lookups Truax, Shawn (MBS) (Jun 04)
- RE: When does snort/ACID do DNS lookups Adriel T. Desautels (Jun 03)