[Snort-users] Trouble getting started

Peter Youll petery at ...7031...
Mon Sep 30 20:28:01 EDT 2002


Dear snort users

I am new to snort, and so far am not having much success - can't even
get windump to work on the required device. I am trying to use a Win2K
server system, which is dedicated to network functionality tasks (RAS,
dns, firewall management etc) with 2 NICs installed - a 100mbps for
normal network traffic and a 10Mbps for snort. The later will be
connected to a port on the network core switch which mirrors traffic on
the port connected to the firewall. For testing purposes it is connected
to a fairly busy hub.

To enumerate the NICs in the server, I run snort -W with results as
follows...
________________________________
D:\snort>snort -W

-*> Snort! <*-
Version 1.8.7-WIN32 (Build 121)
By Martin Roesch (roesch at ...1935..., www.snort.org)
1.7-WIN32 Port By Michael Davis (mike at ...92...,
www.datanerds.net/~mike)
1.8-WIN32 Port By Chris Reid (chris.reid at ...3029...)
1.8-WIN32 Compiled By Michael Steele (michaels at ...155...,
www.silicondefense.com)
          (based on code from 1.7 port)

Interface       Device          Description
-------------------------------------------
1  \Device\Packet_{51BC396F-9CC4-4D79-BB71-0C8F51D6D8D5} (Unknown)
2 \Device\Packet_{882F1156-FCDE-429C-B47B-11991AFDD62C} (Unknown)
3 \Device\Packet_NdisWanIp (Unknown)

D:\snort>
_____________________________________

Question 1 - why are the devices (Unknown)? When I run snort on my Win2K
Pro workstation it responds with the NIC type, as follows...
________________________________________________

Interface       Device          Description
-------------------------------------------
1  \Device\Packet_{43C8B349-34E5-4EBE-AEC7-2D9DE3B46F21} (Novell 2000
Adapter.)
2 \Device\Packet_NdisWanIp (NdisWan Adapter)
________________________________________________

Running windump selecting device 1 works, but from the GUID appears to
be listening on device 2
________________________________________________
D:\SnortInstallers>windump -i 1
windump: listening
on\Device\Packet_{882F1156-FCDE-429C-B47B-11991AFDD62C}
.
Lots of stuff removed.
.
972 packets received by filter
0 packets dropped by kernel
________________________________________________

Running windump selecting device 2 doesn't hear any traffic, probably
because there is none to be heard on the ndis device
________________________________________________

D:\SnortInstallers>

D:\SnortInstallers>windump -i 2
windump: listening on\Device\Packet_NdisWanIp
windump: WARNING: The operation completed successfully.


0 packets received by filter
0 packets dropped by kernel

D:\SnortInstallers>
_____________________________________________________
Running windump on device 3 brings up a GUID not previously seen, and no
traffic is heard
_____________________________________________________

D:\SnortInstallers>windump -i 3
windump: listening
on\Device\Packet_NdisWanNbfIn{971C9CDB-07A3-42A4-9E82-4192A3E3D33F
windump: WARNING: The operation completed successfully.


0 packets received by filter
0 packets dropped by kernel

D:\SnortInstallers>
______________________________________________________

Any clues on what is going wrong would be much appreciated.

Thanks in advance.

PeterY

 ____________________________________________
                       Eschew obfuscation!
  

Peter Youll 
Director IT & Communication
Ambri Limited 
Level 3, 126 Greville Street 
Chatswood NSW 2067 
Australia 
Telephone: +61 2 94223092
Fax: +61 2 94223199
Mobile: +61 4 12803058
Email: petery at ...7032...




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