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-pcap-dir=c:\Network_Device_Logs -pcap-show isn't working, hangs at "commencing packet processing"
From: Matt Lenco <mattlenco () yahoo com>
Date: Tue, 21 Dec 2010 08:26:55 -0800 (PST)

Putting a known file to generate alerts in SNORT into the C:\Network_Device_Logs 
location then running the commands below, a log file is created and alerts are 
sent to Kiwi Syslog, perfect! Since I have 1400 files to process I thought I 
would test reading three from a directory at once. I made three copies of the 
known bad file and renamed them #2 and #3 then ran the second set of commands.

C:\Users\Mo>snort -devr c:\Network_Device_Logs\unicode_hack.pcap -c 
c:\snort\etc\snort.conf -l c:\snort\log -L test -s

C:\Users\Mo>snort -pcap-dir=c:\Network_Device_Logs -pcap-show -c 
c:\snort\etc\snort.conf -l c:\snort\log  -L test -s

However, when I run the commmand below, SNORT initializes but just sits at the 
Commencing packet processing (PID=5132) forever. A log file is created but no 
alerts are seen.  It looks like it isn't reading any files unless I do it 
manually as above.

Has anyone seen this, know what may be the problem and how to correct it?

Note: I pulled the commands from 

When I try to locate the proper command line I see that -pcap-dir doesn't 
C:\Users\Mo>snort --pcap
snort: option `--pcap' is ambiguous
snort: option `--pcap' is ambiguous

   ,,_     -*> Snort! <*-
  o"  )~   Version GRE (Build 92)
   ''''    By Martin Roesch & The Snort Team: 
           Copyright (C) 1998-2010 Sourcefire, Inc., et al.
           Using PCRE version: 8.10 2010-06-25
           Using ZLIB version: 1.2.3

USAGE: snort [-options] <filter options>
       snort /SERVICE /INSTALL [-options] <filter options>
       snort /SERVICE /UNINSTALL
       snort /SERVICE /SHOW
        -A         Set alert mode: fast, full, console, test or none  (alert 
file alerts only)
        -b         Log packets in tcpdump format (much faster!)
        -B <mask>  Obfuscated IP addresses in alerts and packet dumps using CIDR 
        -c <rules> Use Rules File <rules>
        -C         Print out payloads with character data only (no hex)
        -d         Dump the Application Layer
        -e         Display the second layer header info
        -E         Log alert messages to NT Eventlog. (Win32 only)
        -f         Turn off fflush() calls after binary log writes
        -F <bpf>   Read BPF filters from file <bpf>
        -G <0xid>  Log Identifier (to uniquely id events for multiple snorts)
        -h <hn>    Set home network = <hn>
                   (for use with -l or -B, does NOT change $HOME_NET in IDS 
        -H         Make hash tables deterministic.
        -i <if>    Listen on interface <if>
        -I         Add Interface name to alert output
        -k <mode>  Checksum mode (all,noip,notcp,noudp,noicmp,none)
        -K <mode>  Logging mode (pcap[default],ascii,none)
        -l <ld>    Log to directory <ld>
        -L <file>  Log to this tcpdump file
        -n <cnt>   Exit after receiving <cnt> packets
        -N         Turn off logging (alerts still work)
        -O         Obfuscate the logged IP addresses
        -p         Disable promiscuous mode sniffing
        -P <snap>  Set explicit snaplen of packet (default: 1514)
        -q         Quiet. Don't show banner and status report
        -r <tf>    Read and process tcpdump file <tf>
        -R <id>    Include 'id' in snort_intf<id>.pid file name
        -s         Log alert messages to syslog
        -S <n=v>   Set rules file variable n equal to value v
        -T         Test and report on the current Snort configuration
        -U         Use UTC for timestamps
        -v         Be verbose
        -V         Show version number
        -W         Lists available interfaces. (Win32 only)
        -X         Dump the raw packet data starting at the link layer
        -x         Exit if Snort configuration problems occur
        -y         Include year in timestamp in the alert and log files
        -Z <file>  Set the performonitor preprocessor file path and name
        -?         Show this information
<Filter Options> are standard BPF options, as seen in TCPDump
Longname options and their corresponding single char version
   --logid <0xid>                  Same as -G
   --perfmon-file <file>           Same as -Z
   --pid-path <dir>                Specify the directory for the Snort PID file
   --snaplen <snap>                Same as -P
   --help                          Same as -?
   --version                       Same as -V
   --alert-before-pass             Process alert, drop, sdrop, or reject before 
pass, default is pass before alert, drop,...
   --treat-drop-as-alert           Converts drop, sdrop, and reject rules into 
alert rules during startup
   --treat-drop-as-ignore          Use drop, sdrop, and reject rules to ignore 
session traffic when not inline.
   --process-all-events            Process all queued events (drop, alert,...), 
default stops after 1st action group
   --enable-inline-test            Enable Inline-Test Mode Operation
   --dynamic-engine-lib <file>     Load a dynamic detection engine
   --dynamic-engine-lib-dir <path> Load all dynamic engines from directory
   --dynamic-detection-lib <file>  Load a dynamic rules library
   --dynamic-detection-lib-dir <path> Load all dynamic rules libraries from 
   --dump-dynamic-rules <path>     Creates stub rule files of all loaded rules 
   --dynamic-preprocessor-lib <file>  Load a dynamic preprocessor library
   --dynamic-preprocessor-lib-dir <path> Load all dynamic preprocessor libraries 
from directory
   --pcap-single <tf>              Same as -r.
   --pcap-file <file>              file that contains a list of pcaps to read - 
read mode is implied.
   --pcap-list "<list>"            a space separated list of pcaps to read - 
read mode is implied.
   --pcap-loop <count>             this option will read the pcaps specified on 
command line continuously.
                                   for <count> times.  A value of 0 will read 
until Snort is terminated.
   --pcap-reset                    if reading multiple pcaps, reset snort to 
post-configuration state before reading next pcap.
   --pcap-show                     print a line saying what pcap is currently 
being read.
   --exit-check <count>            Signal termination after <count> callbacks 
from DAQ_Acquire(), showing the time it
                                   takes from signaling until DAQ_Stop() is 
   --conf-error-out                Same as -x
   --enable-mpls-multicast         Allow multicast MPLS
   --enable-mpls-overlapping-ip    Handle overlapping IPs within MPLS clouds
   --max-mpls-labelchain-len       Specify the max MPLS label chain
   --mpls-payload-type             Specify the protocol (ipv4, ipv6, ethernet) 
that is encapsulated by MPLS
   --require-rule-sid              Require that all snort rules have SID 
   --daq <type>                    Select packet acquisition module (default is 
   --daq-mode <mode>               Select the DAQ operating mode.
   --daq-var <name=value>          Specify extra DAQ configuration variable.
   --daq-dir <dir>                 Tell snort where to find desired DAQ.
   --daq-list [<dir>]              List packet acquisition modules available in 

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