Snort mailing list archives
Re: Alert Based on MAC Address
From: Matt Kettler <mkettler () evi-inc com>
Date: Thu, 21 Mar 2002 18:39:40 -0500
As Jeff W already said, the content option of a rule looks at the application layer content, not the headers.
you might consider using tcpdump for this purpose: tcpdump ether src <mac address> or run arpwatch.Snort is major overkill for only trying to catch packets with a single, static feature of the header. Snort is designed for applying a few hundred different test cases (including application layer content searches) to each packet and logging matches. Tcpdump is designed for dumping packets which match a relatively simple header content pattern. Choose your tool that best fits the scope of your task.
At 03:34 PM 3/21/2002 -0500, Bamberger, Marc (M.A.) wrote:
I'm interested in tracking a PC that keeps changing it's IP address by it's MAC (Ethernet) address. I would like to write a rule that would alert whenever a certain MAC address appears in a packet. It looks like the content keyword only scans the data of the packet and doesn't match against headers. Am I misunderstanding the content keyword or is there another way to accomplish this?
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Current thread:
- Alert Based on MAC Address Bamberger, Marc (M.A.) (Mar 21)
- Re: Alert Based on MAC Address Matt Kettler (Mar 21)
- <Possible follow-ups>
- RE: Alert Based on MAC Address Wirth, Jeff (Mar 21)
- RE: Alert Based on MAC Address Bamberger, Marc (M.A.) (Mar 26)