[41430] in bugtraq
Re: DNS query spam
daemon@ATHENA.MIT.EDU (Joe)
Wed Nov 30 15:07:58 2005
Message-ID: <438D1B32.8040203@hostpc.com>
Date: Tue, 29 Nov 2005 22:23:30 -0500
From: Joe <joe@hostpc.com>
Reply-To: joe@hostpc.com
MIME-Version: 1.0
To: Josep Ma Castells <jcb@kastells.com>
Cc: bugtraq@securityfocus.com
In-Reply-To: <002e01c5f4b1$42a1b5d0$0203a8c0@beta>
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Would you be able to share the iptables rules you're using to combat this?
Thanks
Josep Ma Castells wrote:
> I have the same problem, now I'm blocking this attempts with iptables
> and the Recent module when a number of tries is reached.
>
> This is the content of the packet:
> =+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
>
> 11/20/05-19:17:37.177173 168.143.XXX.XX:11752 -> YYY.YYY.Y.YY:53
> UDP TTL:233 TOS:0x0 ID:34960 IpLen:20 DgmLen:68 DF
> Len: 48
> 0x0000: 00 07 95 C2 6A 32 00 04 76 DA CB 14 08 00 45 00 ....j2..v.....E.
> 0x0010: 00 44 88 90 40 00 E9 11 2A D5 A8 8F 71 0A C0 A8 .D..@...*...q...
> 0x0020: 04 01 2D E8 00 35 00 30 00 00 20 9E 01 00 00 01 ..-..5.0.. .....
> 0x0030: 00 00 00 00 00 01 01 65 05 6D 70 69 73 69 03 63 .......e.mpisi.c
> 0x0040: 6F 6D 00 00 FF 00 FF 00 00 29 27 10 00 00 00 00 om.......)'.....
> 0x0050: 00 00 ..
>
> =+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
>
> Regards,
>
>
> Josep Ma Castells
>
>
>
> ----- Original Message ----- From: "Piotr Kamisiski"
> <rotunda@ktd.krakow.pl>
> To: <bugtraq@securityfocus.com>
> Sent: Sunday, November 27, 2005 11:30 PM
> Subject: DNS query spam
>
>
>
> Hi all,
>
> Recently my DNS servers get jammed with bogus queries. The attacks come in
> series, taking a few minutes each, sometimes from different IPs at the
> same time, at least twice a day.
>
> <snap>
> 23:05:40.241026 IP 204.92.73.10.40760 > xx.xx.xx.xx.53: 38545+ [1au]
> ANY ANY? e.mpisi.com. (40)
> 23:05:41.600902 IP 204.92.73.10.16561 > xx.xx.xx.xx.53: 22242+ [1au]
> ANY ANY? e.mpisi.com. (40)
> 23:05:42.091743 IP 204.92.73.10.37547 > xx.xx.xx.xx.53: 64644+ [1au]
> ANY ANY? e.mpisi.com. (40)
> 23:05:43.433539 IP 204.92.73.10.32370 > xx.xx.xx.xx.53: 31772+ [1au]
> ANY ANY? e.mpisi.com. (40)
> 23:05:43.854481 IP 204.92.73.10.12913 > xx.xx.xx.xx.53: 33470+ [1au]
> ANY ANY? e.mpisi.com. (40)
> 23:05:44.378640 IP 204.92.73.10.62484 > xx.xx.xx.xx.53: 8726+ [1au] ANY
> ANY? e.mpisi.com. (40)
> 23:05:45.368970 IP 204.92.73.10.57384 > xx.xx.xx.xx.53: 1073+ [1au] ANY
> ANY? e.mpisi.com. (40)
> 23:05:45.379251 IP 204.92.73.10.36997 > xx.xx.xx.xx.53: 22257+ [1au]
> ANY ANY? e.mpisi.com. (40)
> <snap>
>
> Has anyone noticed a similar activity?
>
>
> Best regards,
> Piotr Kamisiński
>
>
