Snort mailing list archives

Trouble Snorting with Multiple Interfaces


From: Travis Rodak <trodak () cmcflex com>
Date: Tue, 20 May 2003 16:03:30 -0600

I am having trouble seeing data on eth1 when eth0 has been started and runs at the same time.
snort -d -i eth0 -c....
snort -d -i eth1 -c....
When I stop snort on eth0 then eth1 will pick up data on its network segment. If they are both running at the same time, eth0 is the only interface that records data. Any ideas?
-----------------------------------------------------------------------------
Here is my ifconfig as well.....

eth0 Link encap:Ethernet HWaddr 00:E0:81:52:01:03 inet addr:192.168.1.20 Bcast:192.168.1.255 Mask:255.255.255.0
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:116249991 errors:0 dropped:0 overruns:0 frame:7
         TX packets:1303454 errors:0 dropped:0 overruns:0 carrier:1
         collisions:13133 txqueuelen:100
         RX bytes:2944149069 (2807.7 Mb)  TX bytes:340014799 (324.2 Mb)
         Interrupt:11

eth1 Link encap:Ethernet HWaddr 00:E0:81:52:01:02 inet addr:10.1.1.200 Bcast:10.1.255.255 Mask:255.255.0.0
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:7718745 errors:0 dropped:0 overruns:0 frame:0
         TX packets:23 errors:0 dropped:0 overruns:4 carrier:0
         collisions:0 txqueuelen:100
         RX bytes:1163621613 (1109.7 Mb)  TX bytes:1776 (1.7 Kb)
         Interrupt:10 Base address:0x2000

lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0
         UP LOOPBACK RUNNING  MTU:16436  Metric:1
         RX packets:380 errors:0 dropped:0 overruns:0 frame:0
         TX packets:380 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:0
         RX bytes:28168 (27.5 Kb)  TX bytes:28168 (27.5 Kb)
----------------------------------------------------------------------------
and route as well.......

192.168.1.0     *               255.255.255.0   U     0      0        0 eth0
10.1.0.0        *               255.255.0.0     U     0      0        0 eth1
127.0.0.0       *               255.0.0.0       U     0      0        0 lo
default         192.168.1.1     0.0.0.0         UG    0      0        0 eth0

-----------------------------------------------------------------------------

Please advise...

--
Travis Rodak
Manager Web Presentation / Security
Computer Marketing Corporation
http://www.cmcflex.com



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