[Snort-users] no packets logged on wireless NIC using WinPcap 3.0, winsnort

Adam Kliarsky 360air at ...5068...
Sun Feb 13 22:48:10 EST 2005

Actually your issue would appear to be the RFMON mode, not your winpcap -
you say that snort/windump works but not with the wireless nic? RMON would
be the component that puts the wireless nic into receive mode, so if this
isn't enabled, then that could be the problem (not winpcap, per my previous


From: snort-users-admin at lists.sourceforge.net
[mailto:snort-users-admin at lists.sourceforge.net] On Behalf Of Ben van der
Sent: Sunday, February 13, 2005 10:09 PM
To: snort-users at lists.sourceforge.net
Subject: [Snort-users] no packets logged on wireless NIC using WinPcap 3.0,

[Is this a 'wireless' limitation or a WinPCap/win32 limitation. Is 'snort
wireless' ok on linux ???]
Original message:
Everything seems ok when I do a 'snort -W':
Interface Device  Description
1  \Device\NPF_{24284523-9129-4F0E-83A3-FB0731F53D25} (D-Link AirPlus Xtreme
G DWL-G520 Adapter (Microsoft's Packet Scheduler) )
(although I am sure that I also had another eth interface listed when doing
a similar command in windump)
When I try to log packets with ' snort -b -v -l c:\Snort\log -i 1'
I get an empty log file (which is deleted as soon as I stop snort).
I have used snort on linux for a while now, but I may be missing something
obvious. I will continue scrutinizing README.wireless, README.win32 and the
faq in case I am doing something stupid.
I have used tcpdump (windump) for a while, but the wireless cards were not
really supported.
snort (and winsnort) seem to have good support for wireless cards - is this
due to an improvement in WinPcap ?
If this is true tcpdump should also have better support for wireless NIC's.
Finally, what is meant by a wirleless card that is in "RFMON" mode ? Is this
not the default setting ? (How can I change this ?)
Some additional info on my installation:
1) snort version: Version 2.3.0RC2-ODBC-MySQL-FlexRESP-WIN32 (Build 9)
2) WinPcap 3.0
3) Windows XP Home Service Pack 2 (with automatic updates)
(I also had to change the permissions on my c:\snort directories before the
empty log file was created.)
Thank you.
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