From owner-freebsd-current@FreeBSD.ORG  Fri May 19 12:13:02 2006
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Date: Fri, 19 May 2006 13:12:56 +0100
From: Brian Candler <B.Candler@pobox.com>
To: Ganbold <ganbold@micom.mng.net>
Message-ID: <20060519121256.GA13356@uk.tiscali.com>
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Cc: freebsd-current@FreeBSD.org, Gleb Smirnoff <glebius@FreeBSD.org>,
	Harti Brandt <harti@FreeBSD.org>
Subject: Re: small patch for ngctl
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On Fri, May 19, 2006 at 05:25:16PM +0900, Ganbold wrote:
> Rec'd data packet on hook "qqqq":
> 0000:  ff ff ff ff ff ff 00 14 6c 2e 23 71 08 00 45 00  ........l.#q..E.
> 0010:  00 4e 17 4e 00 00 80 11 a0 c6 c0 a8 00 3b c0 a8  .N.N.........;..
> 0020:  00 ff 00 89 00 89 00 3a b1 dc 80 8f 01 10 00 01  .......:........
> 0030:  00 00 00 00 00 00 20 45 4f 45 42 46 44 45 42 45  ...... EOEBFDEBE
> 0040:  42 43 41 43 41 43 41 43 41 43 41 43 41 43 41 43  BCACACACACACACAC
> ...
> 
> Is it what it supposed to handle?

Looks like a valid ethernet frame to me;

ff:ff:ff:ff:ff:ff  - destination MAC addr (broadcast)
00:14:6c:2e:23:71  - source MAC addr
0800               - protocol (IP)
  45 00            - IPv4
  00 4e            - datagram length
  17 4e 00 00      - ID, flags, frag offset
  80               - TTL
  11               - protocol (UDP)
  a0 c6            - header checksum
  c0 a8 00 3b      - source IP: 192.168.0.59
  c0 a8 00 ff      - destination IP: 192.168.0.255
  00 89            - source port 137
  00 89            - destination port 137
  00 3a            - length
  b1 dc            - UDP checksum
  ...              - ... data

So I'd say this is some Windows machine broadcasting NetBIOS crap around
your network :-)

Regards,

Brian.