TimeStamp and Conf File Fine Tunning Help

["mike Hughes" <mikehughes013 () hotmail com>]

Hey whats up!

I got snort working finally...on the linux machine i re-installed everything 
and used the TAR package of snort. Im using WEBMIN and ACID to veiw the 
alerts and change settings from my windows machine from my LAN. I have 2 
questions maybe someone can help me on. First the timestamp on my alerts is 
wrong, I just pinged my machine from another machine and it showed 2:39 but 
the time was 6:49. Soo i went to MYSQL and ran this:

SELECT * FROM event WHERE sid =1 AND CID=2508;
1 2058   11  2003-02-18 02:39:46

The clock on ACID is right at the top and my linux machine clock is right 
too? but not the timestamp...Soo im not sure how to fix this. Can you help!

And here is what my .CONF file looks like but it doesnt log PORT scans to 
PORTSCANS for instance i went to www.grc.com and porbed my ports it didnt 
pick it up. how can i fix that too: any help?


# 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 192.168.0.0/24
#
# 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.
#
var HOME_NET $INTERFACE
#
# 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 any
# 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

# 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
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

###################################################
# Step #2: Configure preprocessors
#
# General configuration for preprocessors is of
# the form
# preprocessor <name_of_processor>: <configuration_options>

# 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] than 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 - this option has been moved to config min_ttl: <int>
#
#   ttl_limit [number]     - differential of the initial ttl on a session 
versus
#                             the normal that someone may be playing games.d
#                             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: detect_scans, 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_decode: normalize HTTP requests
# ------------------------------------
# http_decode normalizes HTTP requests from remote
# machines by converting any %XX character
# substitutions to their ASCII equivalent. This is
# very useful for doing things like defeating hostile
# attackers trying to stealth themselves from IDSs by
# mixing these substitutions in with the request.
# Specify the port numbers you want it to analyze as arguments.
#
# Major code cleanups thanks to rfp
#
# unicode          - normalize unicode
# iis_alt_unicode  - %u encoding from iis
# double_encode    - alert on possible double encodings
# iis_flip_slash   - normalize \ as /
# full_whitespace  - treat \t as whitespace ( for apache )
#
# for that GID:
#  SID     Event description
# -----   -------------------
#   1       UNICODE attack
#   2       NULL byte attack

preprocessor http_decode: 80 unicode iis_alt_unicode double_encode 
iis_flip_slash full_whitespace

# rpc_decode: normalize RPC traffic
# ---------------------------------
# RPC may be sent in alternate encodings besides the usual
# 4-byte encoding that is used by default.  This preprocessor
# normalized RPC traffic in much the same way as the http_decode
# preprocessor.  This plugin takes the ports numbers that RPC
# services are running on as arguments.
# The RPC decode preprocessor uses generator ID 106 and does not
# generate any SIDs at this time.

preprocessor rpc_decode: 111 32771

# bo: Back Orifice detector
# -------------------------
# Detects Back Orifice traffic on the network.  This preprocessor
# uses the Back Orifice "encryption" algorithm to search for
# traffic conforming to the Back Orifice protocol (not BO2K).
# This preprocessor can take two arguments.  The first is "-nobrute"
# which turns off the plugin's brute forcing routine (brute forces
# the key space of the protocol to find BO traffic).  The second
# argument that can be passed to the routine is a number to use
# as the default key when trying to decrypt the traffic.  The
# default value is 31337 (just like BO).  Be aware that turning on
# the brute forcing option runs the risk of impacting the overall
# performance of Snort, you've been warned...
#
# 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: -nobrute

# 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

# Portscan: detect a variety of portscans
# ---------------------------------------
# portscan preprocessor by Patrick Mullen <p_mullen () linuxrc net>
# This preprocessor detects UDP packets or TCP SYN packets going to
# four different ports in less than three seconds. "Stealth" TCP
# packets are always detected, regardless of these settings.
# Portscan uses Generator ID 100 and uses the following SIDS for that GID:
#  SID     Event description
# -----   -------------------
#   1       Portscan detect
#   2       Inter-scan info
#   3       Portscan End

preprocessor portscan: $HOME_NET 4 3 portscan.log

# Use portscan-ignorehosts to ignore TCP SYN and UDP "scans" from
# specific networks or hosts to reduce false alerts. It is typical
# to see many false alerts from DNS servers so you may want to
# add your DNS servers here. You can all multiple hosts/networks
# in a whitespace-delimited list.
#
#preprocessor portscan-ignorehosts: 0.0.0.0

# 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

# ASN1 Decode
#-----------------------------------------
# This is an experimental preprocessor.  ASN.1 decoder and analysis plugin
# from Andrew R. Baker.  This preprocessor will detect abuses of the ASN.1
# protocol that higher level protocols (like SSL, SNMP, x.509, etc) rely on.
# The ASN.1 decoder uses Generator ID 115 and uses the following SIDs for
# that GID:
#  SID     Event description
# -----   -------------------
#   1       Indefinite length
#   2       Invalid length
#   3       Oversized item
#   4       ASN.1 specification violation
#   5       Dataum bad length

# preprocessor asn1_decode

# Fnord
#-----------------------------------------
# This is an experimental preprocessor.  Polymorphic shellcode analyzer and
# detector by Dragos Ruiu.  This preprocessor will watch traffic for
# polymorphic NOP-type sleds to defeat tools like ADMutate.  The Fnord 
detector
# uses Generator ID 114 and the following SIDs:
#  SID     Event description
# -----   -------------------
#   1       NOP-sled detected

# preprocessor fnord

# Conversation
#------------------------------------------
# This preprocessor tracks conversations for tcp, udp and icmp traffic.  It
# is a prerequisite for running portscan2.
#
# allowed_ip_protcols 1 6 17
#      list of allowed ip protcols ( defaults to any )
#
# timeout [num]
#      conversation timeout ( defaults to 60 )
#
#
# max_conversations [num]
#      number of conversations to support at once (defaults to 65335)
#
#
# alert_odd_protocols
#      alert on protocols not listed in allowed_ip_protocols

preprocessor conversation: allowed_ip_protocols all, timeout 60, 
max_conversations 32000

# Portscan2
#-------------------------------------------
# Portscan 2, detect portscans in a new and exciting way.
#
# Available options:
#       scanners_max [num]
#       targets_max [num]
#       target_limit [num]
#       port_limit [num]
#       timeout [num]
#       log [logdir]

preprocessor portscan2: scanners_max 3200, targets_max 5000, target_limit 5, 
port_limit 20, timeout 60

# Experimental Perf stats
# -----------------------
# No docs. Highly subject to change.
#
# preprocessor perfmonitor: console flow events time 10

####################################################################
# 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
#
# output alert_syslog: 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=snort dbname=snort 
host=localhost
# output database: alert, postgresql, user=snort dbname=snort
# output database: log, unixodbc, user=snort dbname=snort
# output database: log, mssql, dbname=snort user=snort password=test

# xml: xml logging
# ----------------
# See the README.xml file for more information about configuring
# and using this plugin.
#
# output xml: log, file=/var/log/snortxml

# 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

# trap_snmp: SNMP alerting for Snort
# -------------------------------------------------------------
# Read the README.SNMP file for more information on enabling and using this
# plug-in.
#
#

#The trap_snmp plugin accepts the following notification options
# [c],[p[m|s]]
# where,
#     c : Generate compact notifications. (Saves on bandwidth by
#         not reporting MOs for which values are unknown, not
#         available or, not applicable). By default this option is reset.
#     p : Generate a print of the invariant part of the offending packet.
#         This can be used to track the packet across the Internet.
#         By default this option is reset.
#     m : Use the MD5 algorithm to generate the packet print.
#         By default this algorithm is used.
#     s : Use the SHA1 algorithm to generate the packet print.
#
# The trap_snmp plugin requires several parameters
# The parameters depend on the SNMP version that is used (specified)
# For the SNMPv2c case the parameters will be as follows
#  alert, <sensorID>, [NotificationOptions] , {trap|inform}
#         -v <SnmpVersion> [-p <portNumber>] -c <community> <hostName>
#
# For SNMPv2c traps to the standard snmpTrap port# 162 with
# MD5-digest based packetPrint generation
#
# output trap_snmp: alert, 7, cpm, trap -v 2c -c myCommunity myTrapListener
#
# For SNMPv2c informs with the 'compact' notification option to port 999
#
# output trap_snmp: alert, 7, c, inform -v 2c -p 999 -c myCommunity 
myTrapListener
#
#
# For SNMPv3 traps with
# security name = snortUser
# security level = authentication and privacy
# authentication parameters :
#           authentication protocol = SHA ,
#           authentication pass phrase = SnortAuthPassword
# privacy (encryption) parameters
#           privacy protocol = DES,
#           privacy pass phrase = SnortPrivPassword
#
#output trap_snmp: alert, 7, trap -v 3 -u snortUser -l authPriv -a SHA -A 
SnortAuthPassword -x DES -X SnortPrivPassword myTrapListener
#For SNMPv3 informs with authentication and encryption to myTrapListener
#on port 999
#output trap_snmp: alert, 7, inform -v 3 -p 999 -u snortUser -l authPriv -a 
SHA -A SnortAuthPassword -x DES -X SnortPrivPassword myTrapListener

# 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 $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 $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.
#
# Note that using all of the rules at the same time may lead to
# serious packet loss on slower machines. YMMV, use with caution,
# standard disclaimers apply. :)
#
# 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
#
# shellcode, policy, info, backdoor, and virus rulesets are
# disabled by default.  These require tuning and maintance.
# Please read the included specific file for more information.
#=========================================

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 pop3.rules
include pop2.rules

include nntp.rules
include other-ids.rules
include web-attacks.rules
# include $RULE_PATH/backdoor.rules
# include $RULE_PATH/shellcode.rules
# include $RULE_PATH/policy.rules
# include $RULE_PATH/porn.rules
# include $RULE_PATH/info.rules
# include $RULE_PATH/icmp-info.rules
# include $RULE_PATH/virus.rules
include chat.rules
include multimedia.rules
include p2p.rules
include experimental.rules
include local.rules
####################################################################
Here is my startup script. Do i use $INTERFACE variable in the script above 
or do i use $eth0_address to define my Internet Interface. Hwne it ask like:

var EXTERNAL_NET $INTERFACE or $eth0_address  here is the SNORTD startup 
script.

#!/bin/sh
#
# snortd         Start/Stop the snort IDS daemon.
#
# chkconfig: 2345 40 60
# description:  snort is a lightweight network intrusion detection tool that
#               currently detects more than 1100 host and network
#               vulnerabilities, portscans, backdoors, and more.
#
# June 10, 2000 -- Dave Wreski <dave () linuxsecurity com>
#   - initial version
#
# July 08, 2000 Dave Wreski <dave () guardiandigital com>
#   - added snort user/group
#   - support for 1.6.2
# Source function library.
. /etc/rc.d/init.d/functions
# Specify your network interface here
INTERFACE=eth0

# See how we were called.
case "$1" in
 start)
       echo -n "Starting snort: "
       daemon /usr/local/bin/snort -U -d -D \
               -c /etc/snort/snort.conf
       touch /var/lock/subsys/snort
       echo
       ;;
 stop)
       echo -n "Stopping snort: "
       killproc snort
       rm -f /var/lock/subsys/snort
       echo
       ;;
 restart)
       $0 stop
       $0 start
       ;;
 status)
       status snort
       ;;
 *)
       echo "Usage: $0 {start|stop|restart|status}"
       exit 1
esac
exit 0



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