[Snort-users] [commercial] Re: Snort alarm sameip

Philip Edwards phil.e at ...15568...
Mon May 28 18:11:49 EDT 2012

Hello again,

phil at ...15654...:~$ tcpdump -r dhcp.cap | grep
reading from file dhcp.cap, link-type EN10MB (Ethernet)
18:16:22.019719 IP > BOOTP/DHCP, Request from 00:1b:63:c7:06:bb (oui Unknown), length 300
18:17:25.761463 IP > BOOTP/DHCP, Request from 00:1b:63:c7:06:bb (oui Unknown), length 300
18:17:31.973436 IP philip-edwards-computer.local.mdns > 0 PTR (QM)? b.b.6.0.7.c.e.f.f.f.3.6.b. (90)
tcpdump: pcap_loop: truncated dump file; tried to read 60 captured bytes, only got 24


On 26 May 2012, at 18:53, Eric G wrote:

> On Sat, May 26, 2012 at 8:12 AM, Philip Edwards <phil.e at ...15568...> wrote:
> Hi,
> Howdy!
> Can anyone hazard a guess why the sameip keyword is triggering an alarm on a DHCP request.
> The source is the destination is
> The rule is the default: bad-traffic rule
> alert ip any any -> any any (msg:"BAD-TRAFFIC same SRC/DST"; sameip; reference:bugtraq,2666; reference:cve,1999-0016; reference:url,www.cert.org/advisories/CA-1997-28.html; classtype:bad-unknown; sid:527; rev:8;)
> I would venture to guess that the response from the list is going to be something along the lines of "can you provide us a pcap of the traffic?" That's kind of how folks roll around here.
> --
> Eric
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