Im curious if anyone knows of the "milk" attack. Our network was just slammed by such an attack for about an hour all aimed at one of our core routers. A "sh ip cache x.x.x.x x.x.x.x fl" on it showed this: SrcIf SrcIPaddress DstIf DstIPaddress Pr SrcP DstP Pkts B/Pk Active Fa0/0 208.10.5.2 Local X.X.X.X 11 0498 0017 164K1028 985.3 except from 10 to 15 hosts all nailing us at the same time. The protocol as you see is "11" which I have been unable to find information about. There was no way to filter it and access-lists denying protocol "11" showed 0 matches. Anyone have any ideas? -- \\|// -(@ @)- ==oOO==(_)==OOo========================================================= Steven Nash snash@lightning.net l i g h t n i n g i n t e r n e t s e r v i c e s l l c Chief Backbone Engineer -- Network Engineering http://www.lightning.net
On Thu, Oct 01, 1998 at 05:26:57PM -0400, Steve Nash wrote: ==>SrcIf SrcIPaddress DstIf DstIPaddress Pr SrcP DstP Pkts B/Pk ==>Active ==>Fa0/0 208.10.5.2 Local X.X.X.X 11 0498 0017 ==>164K1028 985.3 ==> ==>except from 10 to 15 hosts all nailing us at the same time. The ==>protocol as you see is "11" which ==>I have been unable to find information about. There was no way to ==>filter it and access-lists denying ==>protocol "11" showed 0 matches. Anyone have any ideas? Protocol 0x11 is 17 in decimal. #define IPPROTO_UDP 17 /* user datagram protocol */ Simple UDP flood. /cah
Hi! Mr.Nash. As you wrote, 11 is udp protocol and Src port is 0x0498(=1176) and dest port is 0x17(=23). If you want to filter it ,In your Bordor router , access-list 106 deny udp host 208.10.5.2 host dest.IP log-in and then ,at your serial port ip access-list 107 in That's all. Regards, On Thu, 1 Oct 1998, Steve Nash wrote:
Im curious if anyone knows of the "milk" attack. Our network was just slammed by such an attack for about an hour all aimed at one of our core routers. A "sh ip cache x.x.x.x x.x.x.x fl" on it showed this:
SrcIf SrcIPaddress DstIf DstIPaddress Pr SrcP DstP Pkts B/Pk Active Fa0/0 208.10.5.2 Local X.X.X.X 11 0498 0017 164K1028 985.3
except from 10 to 15 hosts all nailing us at the same time. The protocol as you see is "11" which I have been unable to find information about. There was no way to filter it and access-lists denying protocol "11" showed 0 matches. Anyone have any ideas?
-- \\|// -(@ @)- ==oOO==(_)==OOo========================================================= Steven Nash snash@lightning.net l i g h t n i n g i n t e r n e t s e r v i c e s l l c Chief Backbone Engineer -- Network Engineering http://www.lightning.net
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participants (3)
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Craig A. Huegen
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Jongwon Kim(�� ��)
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Steve Nash