Re: snort not logging alerts

[Xantius <xantius () xantius com>]

Unfortunately I don't have an answer for you.  But I do want to say that 
I'm in your same boat.  I spent nearly the exact same hours on the exact 
same days trying to come up with the exact same setup you are trying, 
and experienced the exact same results.  It does appear to be running, 
I've made sure the database is getting queries just fine, etc  But when 
I scan my network, it keeps on ticking like there isn't a thing wrong.  
I'm running on Fedora Core 2.  Everything seems to be setup just as it 
should be, but still, no alerts.  I join in your frustration.  Let me 
know if you find an answer or if anyone out there has an answer for us.

--Xantius

Nicholas Bernstein wrote:

> As I'm sure you can see from the timestamp on this email, the current
> time is 5:33am PDT, here, while I'm writing this. I've given up my
> friday night, my saturday day and now all the way up to sunday morning
> on this. If you're wondering if I'm trying to make you feel bad enough
> to give me a hand, the answer is yes. :) 
>
> Anyway, I hope this makes sense, as my eyes are starting to close of
> their own free will. 
>
> I'm trying to setup a simple snort -> mysql -> acid setup, which is
> pretty common, and which I've done numerous times. Unfortunately, in
> this instance, it seems as if snort does not believe anything is an
> alert. I've tested to make sure it's capturing packets (it is) and -T
> seems to think everything is fine. Yet, still, when I run a full nessus
> scan against the host, NOTHING gets added to the db. When I run it from
> command line, the action stats are ALERTS: 0, Logged: 0, Passed: 0. 
>
> I'm running on suse 9.1, w/ a 2.6.4-52 kernel, w/ snort compiled from
> source. This is using the same exact setup I did on FreeBSD two days
> ago, and on RedHat, and earlier versions of suse as well. 
>
> below is the output of snort -T and below that my snort.conf
>
> Any help would be very, very appreciated. I'd like to not have to go out
> and get another harddrive so I can install FreeBSD set it up on that. 
>
>
>
> nick@hemingway:~> sudo snort -T -c /etc/snort/snort.conf -i eth1
> Running in IDS mode
> Log directory = /var/log/snort
>
> Initializing Network Interface eth1
>
>        --== Initializing Snort ==--
> Initializing Output Plugins!
> Decoding Ethernet on interface eth1
> Initializing Preprocessors!
> Initializing Plug-ins!
> Parsing Rules file /etc/snort/snort.conf
>
> +++++++++++++++++++++++++++++++++++++++++++++++++++
> Initializing rule chains...
> ,-----------[Flow Config]----------------------
> | Stats Interval:  0
> | Hash Method:     2
> | Memcap:          10485760
> | Rows  :          4099
> | Overhead Bytes:  16400(%0.16)
> `----------------------------------------------
> No arguments to frag2 directive, setting defaults to:
>    Fragment timeout: 60 seconds
>    Fragment memory cap: 4194304 bytes
>    Fragment min_ttl:   0
>    Fragment ttl_limit: 5
>    Fragment Problems: 0
>    Self preservation threshold: 500
>    Self preservation period: 90
>    Suspend threshold: 1000
>    Suspend period: 30
> Stream4 config:
>    Stateful inspection: ACTIVE
>    Session statistics: INACTIVE
>    Session timeout: 30 seconds
>    Session memory cap: 8388608 bytes
>    State alerts: INACTIVE
>    Evasion alerts: INACTIVE
>    Scan alerts: INACTIVE
>    Log Flushed Streams: INACTIVE
>    MinTTL: 1
>    TTL Limit: 5
>    Async Link: 0
>    State Protection: 0
>    Self preservation threshold: 50
>    Self preservation period: 90
>    Suspend threshold: 200
>    Suspend period: 30
> Stream4_reassemble config:
>    Server reassembly: INACTIVE
>    Client reassembly: ACTIVE
>    Reassembler alerts: ACTIVE
>    Zero out flushed packets: INACTIVE
>    flush_data_diff_size: 500
>    Ports: 21 23 25 53 80 110 111 143 513 1433
>    Emergency Ports: 21 23 25 53 80 110 111 143 513 1433
> HttpInspect Config:
>    GLOBAL CONFIG
>      Max Pipeline Requests:    0
>      Inspection Type:          STATELESS
>      Detect Proxy Usage:       NO
>      IIS Unicode Map Filename: /etc/snort/unicode.map
>      IIS Unicode Map Codepage: 1252
>    DEFAULT SERVER CONFIG:
>      Ports: 80 8080 8180
>      Flow Depth: 300
>      Max Chunk Length: 500000
>      Inspect Pipeline Requests: YES
>      URI Discovery Strict Mode: NO
>      Allow Proxy Usage: NO
>      Disable Alerting: NO
>      Oversize Dir Length: 500
>      Only inspect URI: NO
>      Ascii: YES alert: NO
>      Double Decoding: YES alert: YES
>      %U Encoding: YES alert: YES
>      Bare Byte: YES alert: YES
>      Base36: OFF
>      UTF 8: OFF
>      IIS Unicode: YES alert: YES
>      Multiple Slash: YES alert: NO
>      IIS Backslash: YES alert: NO
>      Directory: YES alert: NO
>      Apache WhiteSpace: YES alert: YES
>      IIS Delimiter: YES alert: YES
>      IIS Unicode Map: GLOBAL IIS UNICODE MAP CONFIG
>      Non-RFC Compliant Characters: NONE
> rpc_decode arguments:
>    Ports to decode RPC on: 111 32771
>    alert_fragments: INACTIVE
>    alert_large_fragments: ACTIVE
>    alert_incomplete: ACTIVE
>    alert_multiple_requests: ACTIVE
> telnet_decode arguments:
>    Ports to decode telnet on: 21 23 25 119
> 1736 Snort rules read...
> 1736 Option Chains linked into 179 Chain Headers
> 0 Dynamic rules
> +++++++++++++++++++++++++++++++++++++++++++++++++++
>
>
> +-----------------------[thresholding-config]----------------------------------
> | memory-cap : 1048576 bytes
> +-----------------------[thresholding-global]----------------------------------
> | none
> +-----------------------[thresholding-local]-----------------------------------
> | gen-id=1      sig-id=2523      type=Both       tracking=dst count=10 
> seconds=10
> | gen-id=1      sig-id=2275       type=Threshold tracking=dst count=5  
> seconds=60
> +-----------------------[suppression]------------------------------------------
> -------------------------------------------------------------------------------
> Rule application order: ->activation->dynamic->alert->pass->log
>
>        --== Initialization Complete ==--
>
> -*> Snort! <*-
> Version 2.1.3 (Build 27)
> By Martin Roesch (roesch () sourcefire com, www.snort.org)
>
> Snort sucessfully loaded all rules and checked all rule chains!
> Final Flow Statistics
> ,----[ FLOWCACHE STATS ]----------
> Memcap: 10485760 Overhead Bytes 16400 used(%0.156403)/blocks (16400/1)
> Overhead blocks: 1 Could Hold: (0)
> IPV4 count: 0 frees: 0 low_time: 0, high_time: 0, diff: 0h:00:00s
>    finds: 0 reversed: 0(%0.000000)
>    find_sucess: 0 find_fail: 0 percent_success: (%0.000000) new_flows:
> 0
> Snort exiting
>
> -----------------------------------------------------------
> #--------------------------------------------------
> #   http://www.snort.org     Snort 2.1.0 Ruleset
> #     Contact: snort-sigs () lists sourceforge net
> #--------------------------------------------------
> # $Id: snort.conf,v 1.133.2.3 2004/02/25 16:52:51 jh8 Exp $
> #
> ###################################################
> # This file contains a sample snort configuration. 
> # You can take the following steps to create your own custom
> configuration:
> #
> #  1) Set the network variables for your network
> #  2) Configure preprocessors
> #  3) Configure output plugins
> #  4) Customize your rule set
> #
> ###################################################
> # Step #1: Set the network variables:
> #
> # You must change the following variables to reflect your local network.
> The
> # variable is currently setup for an RFC 1918 address space.
> #
> # You can specify it explicitly as: 
> #
> # var HOME_NET 10.1.1.0/24
> #
> # or use global variable $<interfacename>_ADDRESS which will be always
> # initialized to IP address and netmask of the network interface which
> you run
> # snort at.  Under Windows, this must be specified as
> # $(<interfacename>_ADDRESS), such as:
> # $(\Device\Packet_{12345678-90AB-CDEF-1234567890AB}_ADDRESS)
> #
> # var HOME_NET $eth0_ADDRESS
> #
> # You can specify lists of IP addresses for HOME_NET
> # by separating the IPs with commas like this:
> #
> # var HOME_NET [10.1.1.0/24,192.168.1.0/24]
> #
> # MAKE SURE YOU DON'T PLACE ANY SPACES IN YOUR LIST!
> #
> # or you can specify the variable to be any IP address
> # like this:
>
> var HOME_NET 192.168.0.0/24
>
> # Set up the external network addresses as well.  A good start may be
> "any"
> var EXTERNAL_NET any
>
> # Configure your server lists.  This allows snort to only look for
> attacks to
> # systems that have a service up.  Why look for HTTP attacks if you are
> not
> # running a web server?  This allows quick filtering based on IP
> addresses
> # These configurations MUST follow the same configuration scheme as
> defined
> # above for $HOME_NET.  
>
> # List of DNS servers on your network 
> var DNS_SERVERS $HOME_NET
>
> # List of SMTP servers on your network
> var SMTP_SERVERS $HOME_NET
>
> # List of web servers on your network
> var HTTP_SERVERS $HOME_NET
>
> # List of sql servers on your network 
> var SQL_SERVERS $HOME_NET
>
> # List of telnet servers on your network
> var TELNET_SERVERS $HOME_NET
>
> # List of snmp servers on your network
> var SNMP_SERVERS $HOME_NET
>
> # Configure your service ports.  This allows snort to look for attacks
> destined
> # to a specific application only on the ports that application runs on. 
> For
> # example, if you run a web server on port 8081, set your HTTP_PORTS
> variable
> # like this:
> #
> # var HTTP_PORTS 8081
> #
> # Port lists must either be continuous [eg 80:8080], or a single port
> [eg 80].
> # We will adding support for a real list of ports in the future.
>
> # Ports you run web servers on
> #
> # Please note:  [80,8080] does not work.
> # If you wish to define multiple HTTP ports,
> # 
> ## var HTTP_PORTS 80 
> ## include somefile.rules 
> ## var HTTP_PORTS 8080
> ## include somefile.rules 
> var HTTP_PORTS 80
>
> # Ports you want to look for SHELLCODE on.
> var SHELLCODE_PORTS !80
>
> # Ports you do oracle attacks on
> var ORACLE_PORTS 1521
>
> # other variables
> # 
> # AIM servers.  AOL has a habit of adding new AIM servers, so instead of
> # modifying the signatures when they do, we add them to this list of
> servers.
> var AIM_SERVERS
> [64.12.24.0/24,64.12.25.0/24,64.12.26.14/24,64.12.28.0/24,64.12.29.0/24,64.12.161.0/24,64.12.163.0/24,205.188.5.0/24,205.188.9.0/24]
>
> # Path to your rules files (this can be a relative path)
> var RULE_PATH ../rules
>
> # Configure the snort decoder
> # ============================
> #
> # Snort's decoder will alert on lots of things such as header
> # truncation or options of unusual length or infrequently used tcp
> options
> #
> #
> # Stop generic decode events:
> #
> # config disable_decode_alerts
> #
> # Stop Alerts on experimental TCP options
> #
> # config disable_tcpopt_experimental_alerts
> #
> # Stop Alerts on obsolete TCP options
> #
> # config disable_tcpopt_obsolete_alerts
> #
> # Stop Alerts on T/TCP alerts
> #
> # In snort 2.0.1 and above, this only alerts when a TCP option is
> detected
> # that shows T/TCP being actively used on the network.  If this is
> normal
> # behavior for your network, disable the next option.
> #
> # config disable_tcpopt_ttcp_alerts
> #
> # Stop Alerts on all other TCPOption type events:
> #
> # config disable_tcpopt_alerts
> #
> # Stop Alerts on invalid ip options
> #
> # config disable_ipopt_alerts
>
> # Configure the detection engine
> # ===============================
> #
> # Use a different pattern matcher in case you have a machine with very
> limited
> # resources:
> #
> # config detection: search-method lowmem
>
> ###################################################
> # Step #2: Configure preprocessors
> #
> # General configuration for preprocessors is of 
> # the form
> # preprocessor <name_of_processor>: <configuration_options>
>
> # Configure Flow tracking module
> # -------------------------------
> #
> # The Flow tracking module is meant to start unifying the state keeping
> # mechanisms of snort into a single place. Right now, only a portscan
> detector
> # is implemented but in the long term,  many of the stateful subsystems
> of
> # snort will be migrated over to becoming flow plugins. This must be
> enabled
> # for flow-portscan to work correctly.
> #
> # See README.flow for additional information
> #
> preprocessor flow: stats_interval 0 hash 2
>
> # frag2: IP defragmentation support
> # -------------------------------
> # This preprocessor performs IP defragmentation.  This plugin will also
> detect
> # people launching fragmentation attacks (usually DoS) against hosts. 
> No
> # arguments loads the default configuration of the preprocessor, which
> is a 60
> # second timeout and a 4MB fragment buffer. 
>
> # The following (comma delimited) options are available for frag2
> #    timeout [seconds] - sets the number of [seconds] that an unfinished
> #                        fragment will be kept around waiting for
> completion,
> #                        if this time expires the fragment will be
> flushed
> #    memcap [bytes] - limit frag2 memory usage to [number] bytes
> #                      (default:  4194304)
> #
> #    min_ttl [number] - minimum ttl to accept
> # 
> #    ttl_limit [number] - difference of ttl to accept without alerting
> #                         will cause false positves with router flap
> # 
> # Frag2 uses Generator ID 113 and uses the following SIDS 
> # for that GID:
> #  SID     Event description
> # -----   -------------------
> #   1       Oversized fragment (reassembled frag > 64k bytes)
> #   2       Teardrop-type attack
>
> preprocessor frag2
>
> # stream4: stateful inspection/stream reassembly for Snort
> #----------------------------------------------------------------------
> # Use in concert with the -z [all|est] command line switch to defeat
> stick/snot
> # against TCP rules.  Also performs full TCP stream reassembly, stateful
> # inspection of TCP streams, etc.  Can statefully detect various
> portscan
> # types, fingerprinting, ECN, etc.
>
> # stateful inspection directive
> # no arguments loads the defaults (timeout 30, memcap 8388608)
> # options (options are comma delimited):
> #   detect_scans - stream4 will detect stealth portscans and generate
> alerts
> #                  when it sees them when this option is set
> #   detect_state_problems - detect TCP state problems, this tends to be
> very
> #                           noisy because there are a lot of crappy ip
> stack
> #                           implementations out there
> #
> #   disable_evasion_alerts - turn off the possibly noisy mitigation of
> #                            overlapping sequences.
> #
> #
> #   min_ttl [number]       - set a minium ttl that snort will accept to
> #                            stream reassembly
> #
> #   ttl_limit [number]     - differential of the initial ttl on a
> session versus
> #                             the normal that someone may be playing
> games.
> #                             Routing flap may cause lots of false
> positives.
> # 
> #   keepstats [machine|binary] - keep session statistics, add "machine"
> to 
> #                         get them in a flat format for machine reading,
> add
> #                         "binary" to get them in a unified binary
> output 
> #                         format
> #   noinspect - turn off stateful inspection only
> #   timeout [number] - set the session timeout counter to [number]
> seconds,
> #                      default is 30 seconds
> #   memcap [number] - limit stream4 memory usage to [number] bytes
> #   log_flushed_streams - if an event is detected on a stream this
> option will
> #                         cause all packets that are stored in the
> stream4
> #                         packet buffers to be flushed to disk.  This
> only 
> #                         works when logging in pcap mode!
> #
> # Stream4 uses Generator ID 111 and uses the following SIDS 
> # for that GID:
> #  SID     Event description
> # -----   -------------------
> #   1       Stealth activity
> #   2       Evasive RST packet
> #   3       Evasive TCP packet retransmission
> #   4       TCP Window violation
> #   5       Data on SYN packet
> #   6       Stealth scan: full XMAS
> #   7       Stealth scan: SYN-ACK-PSH-URG
> #   8       Stealth scan: FIN scan
> #   9       Stealth scan: NULL scan
> #   10      Stealth scan: NMAP XMAS scan
> #   11      Stealth scan: Vecna scan
> #   12      Stealth scan: NMAP fingerprint scan stateful detect
> #   13      Stealth scan: SYN-FIN scan
> #   14      TCP forward overlap
>
> preprocessor stream4: disable_evasion_alerts
>
> # tcp stream reassembly directive
> # no arguments loads the default configuration 
> #   Only reassemble the client,
> #   Only reassemble the default list of ports (See below),  
> #   Give alerts for "bad" streams
> #
> # Available options (comma delimited):
> #   clientonly - reassemble traffic for the client side of a connection
> only
> #   serveronly - reassemble traffic for the server side of a connection
> only
> #   both - reassemble both sides of a session
> #   noalerts - turn off alerts from the stream reassembly stage of
> stream4
> #   ports [list] - use the space separated list of ports in [list],
> "all" 
> #                  will turn on reassembly for all ports, "default" will
> turn
> #                  on reassembly for ports 21, 23, 25, 53, 80, 143, 110,
> 111
> #                  and 513
>
> preprocessor stream4_reassemble
>
> # http_inspect: normalize and detect HTTP traffic and protocol anomalies
> #
> # lots of options available here. See doc/README.http_inspect.
> # unicode.map should be wherever your snort.conf lives, or given
> # a full path to where snort can find it.
> preprocessor http_inspect: global iis_unicode_map unicode.map 1252 
>
> preprocessor http_inspect_server: server default \
>    profile all ports { 80 8080 8180 } oversize_dir_length 500
>
> #
> #  Example unqiue server configuration
> #
> #preprocessor http_inspect_server: server 1.1.1.1 \
> #    ports { 80 3128 8080 } \
> #    flow_depth 0 \
> #    ascii no \
> #    double_decode yes \
> #    non_rfc_char { 0x00 } \
> #    chunk_length 500000 \
> #    non_strict \
> #    oversize_dir_length 300 \
> #    no_alerts
>
>
> # rpc_decode: normalize RPC traffic
> # ---------------------------------
> # RPC may be sent in alternate encodings besides the usual 4-byte
> encoding
> # that is used by default. This plugin takes the port numbers that RPC
> # services are running on as arguments - it is assumed that the given
> ports
> # are actually running this type of service. If not, change the ports or
> turn
> # it off.
> # The RPC decode preprocessor uses generator ID 106
> #
> # arguments: space separated list
> # alert_fragments - alert on any rpc fragmented TCP data
> # no_alert_multiple_requests - don't alert when >1 rpc query is in a
> packet
> # no_alert_large_fragments - don't alert when the fragmented
> #                            sizes exceed the current packet size
> # no_alert_incomplete - don't alert when a single segment
> #                       exceeds the current packet size
>
> preprocessor rpc_decode: 111 32771
>
> # bo: Back Orifice detector
> # -------------------------
> # Detects Back Orifice traffic on the network.  Takes no arguments in
> 2.0.
> # 
> # The Back Orifice detector uses Generator ID 105 and uses the 
> # following SIDS for that GID:
> #  SID     Event description
> # -----   -------------------
> #   1       Back Orifice traffic detected
>
> preprocessor bo
>
> # telnet_decode: Telnet negotiation string normalizer
> # ---------------------------------------------------
> # This preprocessor "normalizes" telnet negotiation strings from telnet
> and ftp
> # traffic.  It works in much the same way as the http_decode
> preprocessor,
> # searching for traffic that breaks up the normal data stream of a
> protocol and
> # replacing it with a normalized representation of that traffic so that
> the
> # "content" pattern matching keyword can work without requiring
> modifications.
> # This preprocessor requires no arguments.
> # Portscan uses Generator ID 109 and does not generate any SID
> currently.
>
> preprocessor telnet_decode
>
> # Flow-Portscan: detect a variety of portscans
> # ---------------------------------------
> # Note:  The Flow preprocessor (above) must first be enabled for
> Flow-Portscan to
> # work.
> #
> # This module detects portscans based off of flow creation in the flow
> # preprocessors.  The goal is to catch catch one->many hosts and
> one->many
> # ports scans.
> #
> # Flow-Portscan has numerous options available, please read
> # README.flow-portscan for help configuring this option. 
>
> # Flow-Portscan uses Generator ID 121 and uses the following SIDS for
> that GID:
> #  SID     Event description
> # -----   -------------------
> #   1       flow-portscan: Fixed Scale Scanner Limit Exceeded
> #   2       flow-portscan: Sliding Scale Scanner Limit Exceeded 
> #   3       flow-portscan: Fixed Scale Talker Limit Exceeded
> #   4       flow-portscan: Sliding Scale Talker Limit Exceeded
>
> # preprocessor flow-portscan: \
> #       talker-sliding-scale-factor 0.50 \
> #       talker-fixed-threshold 30 \
> #       talker-sliding-threshold 30 \
> #       talker-sliding-window 20 \
> #       talker-fixed-window 30 \
> #       scoreboard-rows-talker 30000 \
> #       server-watchnet [10.2.0.0/30] \
> #       server-ignore-limit 200 \
> #       server-rows 65535 \
> #       server-learning-time 14400 \
> #       server-scanner-limit 4 \
> #       scanner-sliding-window 20 \
> #       scanner-sliding-scale-factor 0.50 \
> #       scanner-fixed-threshold 15 \
> #       scanner-sliding-threshold 40 \
> #       scanner-fixed-window 15 \
> #       scoreboard-rows-scanner 30000 \
> #       src-ignore-net [192.168.1.1/32,192.168.0.0/24] \
> #       dst-ignore-net [10.0.0.0/30] \
> #       alert-mode once \
> #       output-mode msg \
> #       tcp-penalties on
>
> # arpspoof
> #----------------------------------------
> # Experimental ARP detection code from Jeff Nathan, detects ARP attacks,
> # unicast ARP requests, and specific ARP mapping monitoring.  To make
> use of
> # this preprocessor you must specify the IP and hardware address of
> hosts on
> # the same layer 2 segment as you.  Specify one host IP MAC combo per
> line.
> # Also takes a "-unicast" option to turn on unicast ARP request
> detection. 
> # Arpspoof uses Generator ID 112 and uses the following SIDS for that
> GID:
>
> #  SID     Event description
> # -----   -------------------
> #   1       Unicast ARP request
> #   2       Etherframe ARP mismatch (src)
> #   3       Etherframe ARP mismatch (dst)
> #   4       ARP cache overwrite attack
>
> #preprocessor arpspoof
> #preprocessor arpspoof_detect_host: 192.168.40.1 f0:0f:00:f0:0f:00
>
>
> # Performance Statistics
> # ----------------------
> # Documentation for this is provided in the Snort Manual.  You should
> read it.
> # It is included in the release distribution as doc/snort_manual.pdf
> # 
> # preprocessor perfmonitor: time 300 file /var/snort/snort.stats pktcnt
> 10000
>
> ####################################################################
> # Step #3: Configure output plugins
> #
> # Uncomment and configure the output plugins you decide to use.  General
> # configuration for output plugins is of the form:
> #
> # output <name_of_plugin>: <configuration_options>
> #
> # alert_syslog: log alerts to syslog
> # ----------------------------------
> # Use one or more syslog facilities as arguments.  Win32 can also
> optionally
> # specify a particular hostname/port.  Under Win32, the default hostname
> is
> # '127.0.0.1', and the default port is 514.
> #
> # [Unix flavours should use this format...]
> # output alert_syslog: LOG_AUTH LOG_ALERT
> #
> # [Win32 can use any of these formats...]
> # output alert_syslog: LOG_AUTH LOG_ALERT
> # output alert_syslog: host=hostname, LOG_AUTH LOG_ALERT
> # output alert_syslog: host=hostname:port, LOG_AUTH LOG_ALERT
>
> # log_tcpdump: log packets in binary tcpdump format
> # -------------------------------------------------
> # The only argument is the output file name.
> #
> # output log_tcpdump: tcpdump.log
>
> # database: log to a variety of databases
> # ---------------------------------------
> # See the README.database file for more information about configuring
> # and using this plugin.
> #
> output database: log, mysql, user=snort password=fakepassword
> dbname=snort host=localhost
> # output database: alert, postgresql, user=snort dbname=snort
> # output database: log, odbc, user=snort dbname=snort
> # output database: log, mssql, dbname=snort user=snort password=test
> # output database: log, oracle, dbname=snort user=snort password=test
>
> # unified: Snort unified binary format alerting and logging
> # -------------------------------------------------------------
> # The unified output plugin provides two new formats for logging and
> generating
> # alerts from Snort, the "unified" format.  The unified format is a
> straight
> # binary format for logging data out of Snort that is designed to be
> fast and
> # efficient.  Used with barnyard (the new alert/log processor), most of
> the
> # overhead for logging and alerting to various slow storage mechanisms
> such as
> # databases or the network can now be avoided.  
> #
> # Check out the spo_unified.h file for the data formats.
> #
> # Two arguments are supported.
> #    filename - base filename to write to (current time_t is appended)
> #    limit    - maximum size of spool file in MB (default: 128)
> #
> # output alert_unified: filename snort.alert, limit 128
> # output log_unified: filename snort.log, limit 128
>
> # You can optionally define new rule types and associate one or more
> output
> # plugins specifically to that type.
> #
> # This example will create a type that will log to just tcpdump.
> # ruletype suspicious
> # {
> #   type log
> #   output log_tcpdump: suspicious.log
> # }
> #
> # EXAMPLE RULE FOR SUSPICIOUS RULETYPE:
> # suspicious tcp $HOME_NET any -> $HOME_NET 6667 (msg:"Internal IRC
> Server";)
> #
> # This example will create a rule type that will log to syslog and a
> mysql
> # database:
> # ruletype redalert
> # {
> #   type alert
> #   output alert_syslog: LOG_AUTH LOG_ALERT
> #   output database: log, mysql, user=snort dbname=snort host=localhost
> # }
> #
> # EXAMPLE RULE FOR REDALERT RULETYPE:
> # redalert tcp $HOME_NET any -> $EXTERNAL_NET 31337 \
> #   (msg:"Someone is being LEET"; flags:A+;)
>
> #
> # Include classification & priority settings
> #
>
> include classification.config
>
> #
> # Include reference systems
> #
>
> include reference.config
>
> ####################################################################
> # Step #4: Customize your rule set
> #
> # Up to date snort rules are available at http://www.snort.org
> #
> # The snort web site has documentation about how to write your own
> custom snort
> # rules.
> #
> # The rules included with this distribution generate alerts based on on
> # suspicious activity. Depending on your network environment, your
> security
> # policies, and what you consider to be suspicious, some of these rules
> may
> # either generate false positives ore may be detecting activity you
> consider to
> # be acceptable; therefore, you are encouraged to comment out rules that
> are
> # not applicable in your environment.
> #
> # The following individuals contributed many of rules in this
> distribution.
> #
> # Credits:
> #   Ron Gula <rgula () securitywizards com> of Network Security Wizards
> #   Max Vision <vision () whitehats com>
> #   Martin Markgraf <martin () mail du gtn com>
> #   Fyodor Yarochkin <fygrave () tigerteam net>
> #   Nick Rogness <nick () rapidnet com>
> #   Jim Forster <jforster () rapidnet com>
> #   Scott McIntyre <scott () whoi edu>
> #   Tom Vandepoel <Tom.Vandepoel () ubizen com>
> #   Brian Caswell <bmc () snort org>
> #   Zeno <admin () cgisecurity com>
> #   Ryan Russell <ryan () securityfocus com>
>
>
>
> #=========================================
> # Include all relevant rulesets here 
> # 
> # The following rulesets are disabled by default:
> #
> #   web-attacks, backdoor, shellcode, policy, porn, info, icmp-info,
> virus,
> #   chat, multimedia, and p2p
> #            
> # These rules are either site policy specific or require tuning in order
> to not
> # generate false positive alerts in most enviornments.
> # 
> # Please read the specific include file for more information and
> # README.alert_order for how rule ordering affects how alerts are
> triggered.
> #=========================================
>
> include local.rules
> include bad-traffic.rules
> include exploit.rules
> include scan.rules
> include finger.rules
> include ftp.rules
> include telnet.rules
> include rpc.rules
> include rservices.rules
> include dos.rules
> include ddos.rules
> include dns.rules
> include tftp.rules
>
> include web-cgi.rules
> include web-coldfusion.rules
> include web-iis.rules
> include web-frontpage.rules
> include web-misc.rules
> include web-client.rules
> include web-php.rules
>
> include sql.rules
> include x11.rules
> include icmp.rules
> include netbios.rules
> include misc.rules
> include attack-responses.rules
> include oracle.rules
> include mysql.rules
> include snmp.rules
>
> include smtp.rules
> include imap.rules
> include pop2.rules
> include pop3.rules
>
> include nntp.rules
> include other-ids.rules
> # include web-attacks.rules
> # include backdoor.rules
> # include shellcode.rules
> # include policy.rules
> # include porn.rules
> # include info.rules
> # include icmp-info.rules
> # include virus.rules
> # include chat.rules
> # include multimedia.rules
> # include p2p.rules
> include experimental.rules
>
> # Include any thresholding or suppression commands. See threshold.conf
> in the
> # <snort src>/etc directory for details. Commands don't necessarily need
> to be
> # contained in this conf, but a separate conf makes it easier to
> maintain them. 
> # Uncomment if needed.
> # include threshold.conf
>
>
>
>  


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