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Commit 9e71a3d9 by Fred Smith
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snort role

parent 1107098d
Showing with 1113 additions and 0 deletions
playbooks/roles/snort/defaults/main.yml 0 → 100644
---
SNORT_OINKCODE: 'oinkcode'
playbooks/roles/snort/tasks/main.yml 0 → 100644
---
# install and configure snort IDS
#
- name: install snort
apt: pkg={{ item }} state="present"
with_items:
- snort
- oinkmaster
- name: configure snort
template: >
src=etc/snort/snort.conf.j2 dest=/etc/snort/snort.conf
owner=root group=root mode=0644
- name: configure snort (debian)
template: >
src=etc/snort/snort.debian.conf.j2 dest=/etc/snort/snort.debian.conf
owner=root group=root mode=0644
- name: configure oinkmaster
template: >
src=etc/oinkmaster.conf.j2 dest=/etc/oinkmaster.conf
owner=root group=root mode=0644
- name: update snort
shell: oinkmaster -C /etc/oinkmaster.conf -o /etc/snort/rules/
sudo: yes
- name: snort service
service: >
name="snort"
state="started"
- name: open read permissions on snort logs
file: >
name="/var/log/snort"
state="directory"
mode="755"
- name: install oinkmaster cronjob
template: >
src=etc/cron.daily/oinkmaster.j2 dest=/etc/cron.daily/oinkmaster
owner=root group=root mode=0755
playbooks/roles/snort/templates/etc/cron.daily/oinkmaster.j2 0 → 100644
#! /bin/bash
oinkmaster -C /etc/oinkmaster.conf -o /etc/snort/rules/ > /dev/null
service snort restart
playbooks/roles/snort/templates/etc/oinkmaster.conf.j2 0 → 100644
# $Id: oinkmaster.conf,v 1.134 2008/02/18 19:33:45 andreas_o Exp $ #
# Use "url = <url>" to specify the location of the rules archive to
# download. The url must begin with http://, https://, ftp://, file://
# or scp:// and end with .tar.gz or .tgz, and the file must be a
# gzipped tarball what contains a directory named "rules".
# You can also point to a local directory with dir://<directory>.
# Multiple "url = <url>" lines can be specified to grab multiple rules
# archives from different locations.
# snort.org rules
url = http://www.snort.org/pub-bin/oinkmaster.cgi/{{ SNORT_OINKCODE }}/snortrules-snapshot-2931.tar.gz
# Community rules for snort-CURRENT
#url = http://www.snort.org/pub-bin/downloads.cgi/Download/comm_rules/Community-Rules-CURRENT.tar.gz
# Emerging threats
url = http://rules.emergingthreats.net/open/snort-2.9.0/emerging.rules.tar.gz
# If you prefer to download the rules archive from outside Oinkmaster,
# you can then point to the file on your local filesystem by using
# file://<filename>, for example:
# url = file:///tmp/snortrules.tar.gz
# In rare cases you may want to grab the rules directly from a
# local directory (don't confuse this with the output directory).
# url = dir:///etc/snort/src/rules
# Example to use scp to copy the rules archive from another host.
# Only OpenSSH is tested. See the FAQ for more information.
# url = scp://user@somehost.example.com:/somedir/snortrules.tar.gz
# If you use -u scp://... and need to specify a private ssh key (passed
# as -i <key> to the scp command) you can specify it here or add an
# entry in ~/.ssh/config for the Oinkmaster user as described in the
# OpenSSH manual.
# scp_key = /home/oinkmaster/oinkmaster_privkey
# The PATH to use during execution. If you prefer to use external
# binaries (i.e. use_external_bins=1, see below), tar and gzip must be
# found, and also wget if downloading via ftp, http or https. All with
# optional .exe suffix. If you're on Cygwin, make sure that the path
# contains the Cygwin binaries and not the native Win32 binaries or
# you will get problems.
# The following UNIX style path is assumed by default:
# path = /bin:/usr/bin:/usr/local/bin
# Example if running native Win32 or standalone Cygwin:
# path = c:\oinkmaster;c:\oinkmaster\bin
# Example if running standalone Cygwin and you prefer Cygwin style path:
# path = /cygdrive/c/oinkmaster:/cygdrive/c/oinkmaster/bin
# We normally use external binaries (wget, tar and gzip) since they're
# already available on most systems and do a good job. If you have the
# Perl modules Archive::Tar, IO::Zlib and LWP::UserAgent, you can use
# those instead if you like. You can set use_external_bins below to
# choose which method you prefer. It's set to 0 by default on Win32
# (i.e. use Perl modules), and 1 on other systems (i.e. use external
# binaries). The reason for that is that the required Perl modules
# are included on Windows/ActivePerl 5.8.1+, so it's easier to use
# those than to install the ported Unix tools. (Note that if you're
# using scp to download the archive, external scp binary is still
# used.)
# use_external_bins = 0
# Temporary directory to use. This directory must exist when starting and
# Oinkmaster will then create a temporary sub directory in here.
# Keep it as a #comment if you want to use the default.
# The default will be checked for in the environment variables TMP,
# TMPDIR or TEMPDIR, or otherwise use "/tmp" if none of them was set.
# Example for UNIX.
# tmpdir = /home/oinkmaster/tmp/
# Example if running native Win32 or Cygwin.
# tmpdir = c:\tmp
# Example if running Cygwin and you prefer Cygwin style path.
# tmpdir = /cygdrive/c/tmp
# The umask to use during execution if you want it to be something
# else than the current value when starting Oinkmaster.
# This will affect the mode bits when writing new files.
# Keep it commented out to keep your system's current umask.
# umask = 0027
# Files in the archive(s) matching this regular expression will be
# checked for changes, and then updated or added if needed.
# All other files will be ignored. You can then choose to skip
# individual files by specifying the "skipfile" keyword below.
# Normally you shouldn't need to change this one.
# update_files = \.rules$|\.config$|\.conf$|\.txt$|\.map$
# Regexp of keywords that starts a Snort rule.
# May be useful if you create your own ruletypes and want those
# lines to be regarded as rules as well.
# rule_actions = alert|drop|log|pass|reject|sdrop|activate|dynamic
# If the number of rules files in the downloaded archive matching the
# 'update_files' regexp is below min_files, or if the number
# of rules is below min_rules, the rules are regarded as broken
# and the update is aborted with an error message.
# Both are set to 1 by default (i.e. the archive is only regarded as
# broken if it's totally empty).
# If you download from multiple URLs, the count is the total number
# of files/rules across all archives.
# min_files = 1
# min_rules = 1
# By default, a basic sanity check is performed on most paths/filenames
# to see if they contain illegal characters that may screw things up.
# If this check is too strict for your system (e.g. you get bogus
# "illegal characters in filename" errors because of your local language
# etc) and you're sure you want to disable the checks completely,
# set use_path_checks to 0.
# use_path_checks = 1
# If you want Oinkmaster to send a User-Agent HTTP header string
# other than the default one for wget/LWP, set this variable.
# user_agent = Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
# The normal Snort rules usually resides in a directory called
# "rules" in the downloaded archive. You can tell Oinkmaster to
# look in another directory by setting the rules_dir statement.
# This allows you to update the shared object rules (so_rules) with
# Oinkmaster by creating a separate oinkmaster.conf containing
# "rules_dir = so_rules". Note that you can not set multiple
# directories so you have to run Oinkmaster separately for each
# directory. Remember to point to different output directories as
# the "rules" and "so_rules" directories contains files with
# identical filenames.
# To update the shared object rules, use:
# rules_dir = so_rules
# The default is to update the normal rules:
# rules_dir = rules
# You can include other files anywhere in here by using
# "include <file>". <file> will be parsed just like a regular
# oinkmaster.conf as soon as the include statement is seen, and then
# return and continue parsing the rest of the original file. If an
# option is redefined, it will override the previous value. You can use
# as many "include" statements as you wish, and also include even more
# files from included files. Example to load stuff from "/etc/foo.conf".
# include /etc/foo.conf
#######################################################################
# Files to totally skip (i.e. never update or check for changes) #
# #
# Syntax: skipfile filename #
# or: skipfile filename1, filename2, filename3, ... #
#######################################################################
# Ignore local.rules from the rules archive by default since we might
# have put some local rules in our own local.rules and we don't want it
# to get overwritten by the empty one from the archive after each
# update.
skipfile local.rules
# The file deleted.rules contains rules that have been deleted from
# other files, so there is usually no point in updating it.
skipfile deleted.rules
# Also skip snort.conf by default since we don't want to overwrite our
# own snort.conf if we have it in the same directory as the rules. If
# you have your own production copy of snort.conf in another directory,
# it may be really nice to check for changes in this file though,
# especially since variables are sometimes added or modified and
# new/old files are included/excluded.
skipfile snort.conf
# You may want to consider ignoring threshold.conf for the same reasons
# as for snort.conf, i.e. if you customize it locally and don't want it
# to become overwritten by the default one. It may be better to put
# local thresholding/suppressing in some local file and still update
# and use the official one though, in case important stuff is added to
# it some day. We do update it by default, but it's your call.
# skipfile threshold.conf
# If you update from multiple URLs at the same time you may need to
# ignore the sid-msg.map (and generate it yourself if you need one) as
# it's usually included in each rules tarball. See the FAQ for more info.
# skipfile sid-msg.map
##########################################################################
# SIDs to modify after each update (only for the skilled/stupid/brave). #
# Don't use it unless you have to. There is nothing that stops you from #
# modifying rules in such ways that they become invalid or generally #
# break things. You have been warned. #
# If you just want to disable SIDs, please skip this section and have a #
# look at the "disablesid" keyword below. #
# #
# You may specify multiple modifysid directives for the same SID (they #
# will be processed in order of appearance), and you may also specify a #
# list of SIDs on which the substitution should be applied. #
# If the argument is in the form something.something it's regarded #
# as a filename and the substitution will apply on all rules in that #
# file. The wildcard ("*") can be used to apply the substitution on all #
# rules regardless of the SID or file. Please avoid using #comments #
# at the end of modifysid lines, they may confuse the parser in some #
# situations. #
# #
# Syntax: #
# modifysid SID "replacethis" | "withthis" #
# or: #
# modifysid SID1, SID2, SID3, ... "replacethis" | "withthis" #
# or: #
# modifysid file "replacethis" | "withthis" #
# or: #
# modifysid * "replacethis" | "withthis" #
# #
# The strings within the quotes will basically be passed to a #
# s/replacethis/withthis/ statement in Perl, so they must be valid #
# regular expressions. The strings are case-insensitive and only the #
# first occurrence will be replaced. If there are multiple occurrences #
# you want to replace, simply repeat the same modifysid line. #
# As the strings are regular expressions, you MUST escape special #
# characters like $ \ / ( ) | by prepending a "\" to them. #
# #
# If you specify a modifysid statement for a multi-line rule, Oinkmaster #
# will first translate the rule into a single-line version and then #
# perform the substitution, so you don't have to care about the trailing #
# backslashes and newlines. #
# #
# If you use backreference variables in the substitution expression, #
# it's strongly recommended to specify them as ${1} instead of $1 and so #
# on, to avoid parsing confusion with unexpected results in some #
# situations. Note that modifysid statements will process both active #
# and inactive (disabled) rules. #
# #
# You may want to check out README.templates and template-examples.conf #
# to find how you can simplify the modifysid usage by using templates. #
##########################################################################
# Example to enable a rule (in this case SID 1325) that is disabled by
# default, by simply replacing leading "#alert" with "alert".
# (You should really use 'enablesid' for this though.)
# Oinkmaster removes whitespaces next to the leading "#" so you don't
# have to worry about that, but be careful about possible whitespace in
# other places when writing the regexps.
# modifysid 1325 "^#alert" | "alert"
# You could also do this to enable it no matter what type of rule it is
# (alert, log, pass, etc).
# modifysid 1325 "^#" | ""
# Example to enable ALL rules in ALL files (usually not a good idea).
# modifysid * "^#" | ""
# Example to add "tag" stuff to SID 1325.
# modifysid 1325 "sid:1325;" | "sid:1325; tag: host, src, 300, seconds;"
# Example to make SID 1378 a 'drop' rule (valid if you're running
# Snort_inline).
# modifysid 1378 "^alert" | "drop"
# Example to replace first occurrence of $EXTERNAL_NET with $HOME_NET
# in SID 302.
# modifysid 302 "\$EXTERNAL_NET" | "\$HOME_NET"
# You can also specify that a substitution should apply on multiple SIDs.
# modifysid 302,429,1821 "\$EXTERNAL_NET" | "\$HOME_NET"
# You can take advantage of the fact that it's regular expressions and
# do more complex stuff. This example (for Snort_inline) adds a 'replace'
# statement to SID 1324 that replaces "/bin/sh" with "/foo/sh".
# modifysid 1324 "(content\s*:\s*"\/bin\/sh"\s*;)" | \
# "${1} replace:"\/foo\/sh";"
# If you for some reason would like to add a comment inside the actual
# rules file, like the reason why you disabled this rule, you can do
# like this (you would normally add such comments in oinkmaster.conf
# though).
# modifysid 1324 "(.+)" | "# 20020101: disabled this rule just for fun:\n#${1}"
# Here is an example that is actually useful. Let's say you don't care
# about incoming welchia pings (detected by SID 483 at the time of
# writing) but you want to know when infected hosts on your network
# scans hosts on the outside. (Remember that watching for outgoing
# malicious packets is often just as important as watching for incoming
# ones, especially in this case.) The rule currently looks like
# "alert icmp $EXTERNAL_NET any -> $HOME_NET any ..."
# but we want to switch that so it becomes
# "alert icmp $HOME_NET any -> $EXTERNAL_NET any ...".
# Here is how it could be done.
# modifysid 483 \
# "(.+) \$EXTERNAL_NET (.+) \$HOME_NET (.+)" | \
# "${1} \$HOME_NET ${2} \$EXTERNAL_NET ${3}"
# The wildcard (modifysid * ...) can be used to do all kinds of
# interesting things. The substitution expression will be applied on all
# matching rules. First, a silly example to replace "foo" with "bar" in
# all rules (that have the string "foo" in them, that is.)
# modifysid * "foo" | "bar"
# If you for some reason don't want to use the stream preprocessor to
# match established streams, you may want to replace the 'flow'
# statement with 'flags:A+;' in all those rules.
# modifysid * "flow:[a-z,_ ]+;" | "flags:A+;"
# Example to convert all rules of classtype attempted-admin to 'drop'
# rules (for Snort_inline only, obviously).
# modifysid * "^alert (.*classtype\s*:\s*attempted-admin)" | "drop ${1}"
# This one will append some text to the 'msg' string for all rules that
# have the 'tag' keyword in them.
# modifysid * "(.*msg:\s*".+?)"(\s*;.+;\s*tag:.*)" | \
# "${1}, going to tag this baby"${2}"
# There may be times when you want to replace multiple occurrences of a
# certain keyword/string in a rule and not just the first one. To
# replace the first two occurrences of "foo" with "bar" in SID 100,
# simply repeat the modifysid statement:
# modifysid 100 "foo" | "bar"
# modifysid 100 "foo" | "bar"
# Or you can even specify a SID list but repeat the same SID as many
# times as required, like:
# modifysid 100,100,100 "foo" | "bar"
# Enable all rules in the file exploit.rules.
# modifysid exploit.rules "^#" | ""
# Enable all rules in exploit.rules, icmp-info.rules and also SID 1171.
# modifysid exploit.rules, snmp.rules, 1171 "^#" | ""
########################################################################
# SIDs that we don't want to update. #
# If you for some reason don't want a specific rule to be updated #
# (e.g. you made local modifications to it and you never want to #
# update it and don't care about changes in the official version), you #
# can specify a "localsid" statement for it. This means that the old #
# version of the rule (i.e. the one in the rules file on your #
# harddrive) is always kept, regardless if the official version has #
# been updated. Please do not use this feature unless in special #
# cases as it's easy to end up with many signatures that aren't #
# maintained anymore. See the FAQ for details about this and hints #
# about better solutions regarding customization of rules. #
# #
# Syntax: localsid SID #
# or: localsid SID1, SID2, SID3, ... #
########################################################################
# Example to never update SID 1325.
# localsid 1325
########################################################################
# SIDs to enable after each update. #
# Will simply remove all the leading '#' for a specified SID (if it's #
# a multi-line rule, the leading '#' for all lines are removed.) #
# These will be processed after all the modifysid and disablesid #
# statements. Using 'enablesid' on a rule that is not disabled is a #
# NOOP. #
# #
# Syntax: enablesid SID #
# or: enablesid SID1, SID2, SID3, ... #
########################################################################
# Example to enable SID 1325.
# enablesid 1325
########################################################################
# SIDs to comment out, i.e. disable, after each update by placing a #
# '#' in front of the rule (if it's a multi-line rule, it will be put #
# in front of all lines). #
# #
# Syntax: disablesid SID #
# or: disablesid SID1, SID2, SID3, ... #
########################################################################
# You can specify one SID per line.
# disablesid 1
# disablesid 2
# disablesid 3
# And also as comma-separated lists.
# disablesid 4,5,6
# It's a good idea to also add comment about why you disable the sid:
# disablesid 1324 # 20020101: disabled this SID just because I can
playbooks/roles/snort/templates/etc/snort/snort.conf.j2 0 → 100644
#--------------------------------------------------
# VRT Rule Packages Snort.conf
#
# For more information visit us at:
# http://www.snort.org Snort Website
# http://vrt-sourcefire.blogspot.com/ Sourcefire VRT Blog
#
# Mailing list Contact: snort-sigs@lists.sourceforge.net
# False Positive reports: fp@sourcefire.com
# Snort bugs: bugs@snort.org
#
# Compatible with Snort Versions:
# VERSIONS : 2.9.2.0
#
# Snort build options:
# OPTIONS : --enable-ipv6 --enable-gre --enable-mpls --enable-targetbased --enable-decoder-preprocessor-rules --enable-ppm --enable-perfprofiling --enable-zlib --enable-active-response --enable-normalizer --enable-reload --enable-react --enable-flexresp3
#
# Additional information:
# This configuration file enables active response, to run snort in
# test mode -T you are required to supply an interface -i <interface>
# or test mode will fail to fully validate the configuration and
# exit with a FATAL error
#--------------------------------------------------
###################################################
# This file contains a sample snort configuration.
# You should take the following steps to create your own custom configuration:
#
# 1) Set the network variables.
# 2) Configure the decoder
# 3) Configure the base detection engine
# 4) Configure dynamic loaded libraries
# 5) Configure preprocessors
# 6) Configure output plugins
# 7) Customize your rule set
# 8) Customize preprocessor and decoder rule set
# 9) Customize shared object rule set
###################################################
###################################################
# Step #1: Set the network variables. For more information, see README.variables
###################################################
# Setup the network addresses you are protecting
ipvar HOME_NET any
# Set up the external network addresses. Leave as "any" in most situations
ipvar EXTERNAL_NET any
#ipvar EXTERNAL_NET !$HOME_NET
# List of DNS servers on your network
ipvar DNS_SERVERS $HOME_NET
# List of SMTP servers on your network
ipvar SMTP_SERVERS $HOME_NET
# List of web servers on your network
ipvar HTTP_SERVERS $HOME_NET
# List of sql servers on your network
ipvar SQL_SERVERS $HOME_NET
# List of telnet servers on your network
ipvar TELNET_SERVERS $HOME_NET
# List of ssh servers on your network
ipvar SSH_SERVERS $HOME_NET
# List of ftp servers on your network
ipvar FTP_SERVERS $HOME_NET
# List of sip servers on your network
ipvar SIP_SERVERS $HOME_NET
# List of ports you run web servers on
portvar HTTP_PORTS [80,8000,18000,18010,18020,18030,18040,18050,18060,18070,18080,18090,18100]
# List of ports you want to look for SHELLCODE on.
portvar SHELLCODE_PORTS !80
# List of ports you might see oracle attacks on
portvar ORACLE_PORTS 1024:
# List of ports you want to look for SSH connections on:
portvar SSH_PORTS 22
# List of ports you run ftp servers on
portvar FTP_PORTS [21,2100,3535]
# List of ports you run SIP servers on
portvar SIP_PORTS [5060,5061,5600]
# other variables, these should not be modified
ipvar AIM_SERVERS [64.12.24.0/23,64.12.28.0/23,64.12.161.0/24,64.12.163.0/24,64.12.200.0/24,205.188.3.0/24,205.188.5.0/24,205.188.7.0/24,205.188.9.0/24,205.188.153.0/24,205.188.179.0/24,205.188.248.0/24]
# Path to your rules files (this can be a relative path)
# Note for Windows users: You are advised to make this an absolute path,
# such as: c:\snort\rules
var RULE_PATH /etc/snort/rules
var SO_RULE_PATH /etc/snort/so_rules
var PREPROC_RULE_PATH /etc/snort/preproc_rules
###################################################
# Step #2: Configure the decoder. For more information, see README.decode
###################################################
# 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
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
# Alert if value in length field (IP, TCP, UDP) is greater th elength of the packet
# config enable_decode_oversized_alerts
# Same as above, but drop packet if in Inline mode (requires enable_decode_oversized_alerts)
# config enable_decode_oversized_drops
# Configure IP / TCP checksum mode
config checksum_mode: all
# Configure maximum number of flowbit references. For more information, see README.flowbits
# config flowbits_size: 64
# Configure ports to ignore
# config ignore_ports: tcp 21 6667:6671 1356
# config ignore_ports: udp 1:17 53
# Configure active response for non inline operation. For more information, see REAMDE.active
# config response: eth0 attempts 2
# Configure DAQ related options for inline operation. For more information, see README.daq
#
# config daq: <type>
# config daq_dir: <dir>
# config daq_mode: <mode>
# config daq_var: <var>
#
# <type> ::= pcap | afpacket | dump | nfq | ipq | ipfw
# <mode> ::= read-file | passive | inline
# <var> ::= arbitrary <name>=<value passed to DAQ
# <dir> ::= path as to where to look for DAQ module so's
# Configure specific UID and GID to run snort as after dropping privs. For more information see snort -h command line options
#
# config set_gid:
# config set_uid:
# Configure default snaplen. Snort defaults to MTU of in use interface. For more information see README
#
# config snaplen:
#
# Configure default bpf_file to use for filtering what traffic reaches snort. For more information see snort -h command line options (-F)
#
# config bpf_file:
#
# Configure default log directory for snort to log to. For more information see snort -h command line options (-l)
#
# config logdir:
###################################################
# Step #3: Configure the base detection engine. For more information, see README.decode
###################################################
# Configure PCRE match limitations
config pcre_match_limit: 3500
config pcre_match_limit_recursion: 1500
# Configure the detection engine See the Snort Manual, Configuring Snort - Includes - Config
config detection: search-method ac-split search-optimize max-pattern-len 20
# Configure the event queue. For more information, see README.event_queue
config event_queue: max_queue 8 log 3 order_events content_length
###################################################
# Per packet and rule latency enforcement
# For more information see README.ppm
###################################################
# Per Packet latency configuration
#config ppm: max-pkt-time 250, \
# fastpath-expensive-packets, \
# pkt-log
# Per Rule latency configuration
#config ppm: max-rule-time 200, \
# threshold 3, \
# suspend-expensive-rules, \
# suspend-timeout 20, \
# rule-log alert
###################################################
# Configure Perf Profiling for debugging
# For more information see README.PerfProfiling
###################################################
#config profile_rules: print all, sort avg_ticks
#config profile_preprocs: print all, sort avg_ticks
###################################################
# Step #4: Configure dynamic loaded libraries.
# For more information, see Snort Manual, Configuring Snort - Dynamic Modules
###################################################
# path to dynamic preprocessor libraries
dynamicpreprocessor directory /usr/lib/snort_dynamicpreprocessor/
# path to base preprocessor engine
dynamicengine /usr/lib/snort_dynamicengine/libsf_engine.so
# path to dynamic rules libraries
# dynamicdetection directory /usr/lib/snort_dynamicrules
###################################################
# Step #5: Configure preprocessors
# For more information, see the Snort Manual, Configuring Snort - Preprocessors
###################################################
# Inline packet normalization. For more information, see README.normalize
# Does nothing in IDS mode
preprocessor normalize_ip4
preprocessor normalize_tcp: ips ecn stream
preprocessor normalize_icmp4
preprocessor normalize_ip6
preprocessor normalize_icmp6
# Target-based IP defragmentation. For more inforation, see README.frag3
preprocessor frag3_global: max_frags 65536
preprocessor frag3_engine: policy windows detect_anomalies overlap_limit 10 min_fragment_length 100 timeout 180
# Target-Based stateful inspection/stream reassembly. For more inforation, see README.stream5
preprocessor stream5_global: track_tcp yes, \
track_udp yes, \
track_icmp no, \
max_tcp 262144, \
max_udp 131072, \
max_active_responses 2, \
min_response_seconds 5
preprocessor stream5_tcp: policy windows, detect_anomalies, require_3whs 180, \
overlap_limit 10, small_segments 3 bytes 150, timeout 180, \
ports client 21 22 23 25 42 53 79 109 110 111 113 119 135 136 137 139 143 \
161 445 513 514 587 593 691 1433 1521 2100 3306 6070 6665 6666 6667 6668 6669 \
7000 8181 32770 32771 32772 32773 32774 32775 32776 32777 32778 32779, \
ports both 80 81 311 443 465 563 591 593 636 901 989 992 993 994 995 1220 1414 1830 2301 2381 2809 3128 3702 5250 7907 7001 7802 7777 7779 \
7801 7900 7901 7902 7903 7904 7905 7906 7908 7909 7910 7911 7912 7913 7914 7915 7916 \
7917 7918 7919 7920 8000 8008 8028 8080 8088 8118 8123 8180 8243 8280 8888 9090 9091 9443 9999 11371 \
18000 18010 18020 18030 18040 18050 18060 18070 18080 18090 18100
preprocessor stream5_udp: timeout 180
# performance statistics. For more information, see the Snort Manual, Configuring Snort - Preprocessors - Performance Monitor
# preprocessor perfmonitor: time 300 file /var/snort/snort.stats pktcnt 10000
# HTTP normalization and anomaly detection. For more information, see README.http_inspect
preprocessor http_inspect: global iis_unicode_map unicode.map 1252 compress_depth 65535 decompress_depth 65535
preprocessor http_inspect_server: server default \
chunk_length 500000 \
server_flow_depth 0 \
client_flow_depth 0 \
post_depth 65495 \
oversize_dir_length 500 \
max_header_length 750 \
max_headers 100 \
ports { 80 8000 18000 18010 18020 18030 18040 18050 18060 18070 18080 18090 18100 } \
non_rfc_char { 0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 } \
enable_cookie \
extended_response_inspection \
inspect_gzip \
normalize_utf \
unlimited_decompress \
apache_whitespace no \
ascii no \
bare_byte no \
directory no \
double_decode no \
iis_backslash no \
iis_delimiter no \
iis_unicode no \
multi_slash no \
utf_8 no \
u_encode yes \
webroot no
# ONC-RPC normalization and anomaly detection. For more information, see the Snort Manual, Configuring Snort - Preprocessors - RPC Decode
preprocessor rpc_decode: 111 32770 32771 32772 32773 32774 32775 32776 32777 32778 32779 no_alert_multiple_requests no_alert_large_fragments no_alert_incomplete
# Back Orifice detection.
preprocessor bo
# FTP / Telnet normalization and anomaly detection. For more information, see README.ftptelnet
preprocessor ftp_telnet: global inspection_type stateful encrypted_traffic no
preprocessor ftp_telnet_protocol: telnet \
ayt_attack_thresh 20 \
normalize ports { 23 } \
detect_anomalies
preprocessor ftp_telnet_protocol: ftp server default \
def_max_param_len 100 \
ports { 21 2100 3535 } \
telnet_cmds yes \
ignore_telnet_erase_cmds yes \
ftp_cmds { ABOR ACCT ADAT ALLO APPE AUTH CCC CDUP } \
ftp_cmds { CEL CLNT CMD CONF CWD DELE ENC EPRT } \
ftp_cmds { EPSV ESTA ESTP FEAT HELP LANG LIST LPRT } \
ftp_cmds { LPSV MACB MAIL MDTM MIC MKD MLSD MLST } \
ftp_cmds { MODE NLST NOOP OPTS PASS PASV PBSZ PORT } \
ftp_cmds { PROT PWD QUIT REIN REST RETR RMD RNFR } \
ftp_cmds { RNTO SDUP SITE SIZE SMNT STAT STOR STOU } \
ftp_cmds { STRU SYST TEST TYPE USER XCUP XCRC XCWD } \
ftp_cmds { XMAS XMD5 XMKD XPWD XRCP XRMD XRSQ XSEM } \
ftp_cmds { XSEN XSHA1 XSHA256 } \
alt_max_param_len 0 { ABOR CCC CDUP ESTA FEAT LPSV NOOP PASV PWD QUIT REIN STOU SYST XCUP XPWD } \
alt_max_param_len 200 { ALLO APPE CMD HELP NLST RETR RNFR STOR STOU XMKD } \
alt_max_param_len 256 { CWD RNTO } \
alt_max_param_len 400 { PORT } \
alt_max_param_len 512 { SIZE } \
chk_str_fmt { ACCT ADAT ALLO APPE AUTH CEL CLNT CMD } \
chk_str_fmt { CONF CWD DELE ENC EPRT EPSV ESTP HELP } \
chk_str_fmt { LANG LIST LPRT MACB MAIL MDTM MIC MKD } \
chk_str_fmt { MLSD MLST MODE NLST OPTS PASS PBSZ PORT } \
chk_str_fmt { PROT REST RETR RMD RNFR RNTO SDUP SITE } \
chk_str_fmt { SIZE SMNT STAT STOR STRU TEST TYPE USER } \
chk_str_fmt { XCRC XCWD XMAS XMD5 XMKD XRCP XRMD XRSQ } \
chk_str_fmt { XSEM XSEN XSHA1 XSHA256 } \
cmd_validity ALLO < int [ char R int ] > \
cmd_validity EPSV < [ { char 12 | char A char L char L } ] > \
cmd_validity MACB < string > \
cmd_validity MDTM < [ date nnnnnnnnnnnnnn[.n[n[n]]] ] string > \
cmd_validity MODE < char ASBCZ > \
cmd_validity PORT < host_port > \
cmd_validity PROT < char CSEP > \
cmd_validity STRU < char FRPO [ string ] > \
cmd_validity TYPE < { char AE [ char NTC ] | char I | char L [ number ] } >
preprocessor ftp_telnet_protocol: ftp client default \
max_resp_len 256 \
bounce yes \
ignore_telnet_erase_cmds yes \
telnet_cmds yes
# SMTP normalization and anomaly detection. For more information, see README.SMTP
preprocessor smtp: ports { 25 465 587 691 } \
inspection_type stateful \
b64_decode_depth 0 \
qp_decode_depth 0 \
bitenc_decode_depth 0 \
uu_decode_depth 0 \
log_mailfrom \
log_rcptto \
log_filename \
log_email_hdrs \
normalize cmds \
normalize_cmds { ATRN AUTH BDAT CHUNKING DATA DEBUG EHLO EMAL ESAM ESND ESOM ETRN EVFY } \
normalize_cmds { EXPN HELO HELP IDENT MAIL NOOP ONEX QUEU QUIT RCPT RSET SAML SEND SOML } \
normalize_cmds { STARTTLS TICK TIME TURN TURNME VERB VRFY X-ADAT X-DRCP X-ERCP X-EXCH50 } \
normalize_cmds { X-EXPS X-LINK2STATE XADR XAUTH XCIR XEXCH50 XGEN XLICENSE XQUE XSTA XTRN XUSR } \
max_command_line_len 512 \
max_header_line_len 1000 \
max_response_line_len 512 \
alt_max_command_line_len 260 { MAIL } \
alt_max_command_line_len 300 { RCPT } \
alt_max_command_line_len 500 { HELP HELO ETRN EHLO } \
alt_max_command_line_len 255 { EXPN VRFY ATRN SIZE BDAT DEBUG EMAL ESAM ESND ESOM EVFY IDENT NOOP RSET } \
alt_max_command_line_len 246 { SEND SAML SOML AUTH TURN ETRN DATA RSET QUIT ONEX QUEU STARTTLS TICK TIME TURNME VERB X-EXPS X-LINK2STATE XADR XAUTH XCIR XEXCH50 XGEN XLICENSE XQUE XSTA XTRN XUSR } \
valid_cmds { ATRN AUTH BDAT CHUNKING DATA DEBUG EHLO EMAL ESAM ESND ESOM ETRN EVFY } \
valid_cmds { EXPN HELO HELP IDENT MAIL NOOP ONEX QUEU QUIT RCPT RSET SAML SEND SOML } \
valid_cmds { STARTTLS TICK TIME TURN TURNME VERB VRFY X-ADAT X-DRCP X-ERCP X-EXCH50 } \
valid_cmds { X-EXPS X-LINK2STATE XADR XAUTH XCIR XEXCH50 XGEN XLICENSE XQUE XSTA XTRN XUSR } \
xlink2state { enabled }
# Portscan detection. For more information, see README.sfportscan
# preprocessor sfportscan: proto { all } memcap { 10000000 } sense_level { low }
# ARP spoof detection. For more information, see the Snort Manual - Configuring Snort - Preprocessors - ARP Spoof Preprocessor
# preprocessor arpspoof
# preprocessor arpspoof_detect_host: 192.168.40.1 f0:0f:00:f0:0f:00
# SSH anomaly detection. For more information, see README.ssh
preprocessor ssh: server_ports { 22 } \
autodetect \
max_client_bytes 19600 \
max_encrypted_packets 20 \
max_server_version_len 100 \
enable_respoverflow enable_ssh1crc32 \
enable_srvoverflow enable_protomismatch
# SMB / DCE-RPC normalization and anomaly detection. For more information, see README.dcerpc2
preprocessor dcerpc2: memcap 102400, events [co ]
preprocessor dcerpc2_server: default, policy WinXP, \
detect [smb [139,445], tcp 135, udp 135, rpc-over-http-server 593], \
autodetect [tcp 1025:, udp 1025:, rpc-over-http-server 1025:], \
smb_max_chain 3, smb_invalid_shares ["C$", "D$", "ADMIN$"]
# DNS anomaly detection. For more information, see README.dns
preprocessor dns: ports { 53 } enable_rdata_overflow
# SSL anomaly detection and traffic bypass. For more information, see README.ssl
preprocessor ssl: ports { 443 465 563 636 989 992 993 994 995 7801 7802 7900 7901 7902 7903 7904 7905 7906 7907 7908 7909 7910 7911 7912 7913 7914 7915 7916 7917 7918 7919 7920 }, trustservers, noinspect_encrypted
# SDF sensitive data preprocessor. For more information see README.sensitive_data
preprocessor sensitive_data: alert_threshold 25
# SIP Session Initiation Protocol preprocessor. For more information see README.sip
preprocessor sip: max_sessions 10000, \
ports { 5060 5061 5600 }, \
methods { invite \
cancel \
ack \
bye \
register \
options \
refer \
subscribe \
update \
join \
info \
message \
notify \
benotify \
do \
qauth \
sprack \
publish \
service \
unsubscribe \
prack }, \
max_uri_len 512, \
max_call_id_len 80, \
max_requestName_len 20, \
max_from_len 256, \
max_to_len 256, \
max_via_len 1024, \
max_contact_len 512, \
max_content_len 1024
# IMAP preprocessor. For more information see README.imap
preprocessor imap: \
ports { 143 } \
b64_decode_depth 0 \
qp_decode_depth 0 \
bitenc_decode_depth 0 \
uu_decode_depth 0
# POP preprocessor. For more information see README.pop
preprocessor pop: \
ports { 110 } \
b64_decode_depth 0 \
qp_decode_depth 0 \
bitenc_decode_depth 0 \
uu_decode_depth 0
###################################################
# Step #6: Configure output plugins
# For more information, see Snort Manual, Configuring Snort - Output Modules
###################################################
# unified2
# Recommended for most installs
# output unified2: filename merged.log, limit 128, nostamp, mpls_event_types, vlan_event_types
# Additional configuration for specific types of installs
# output alert_unified2: filename snort.alert, limit 128, nostamp
# output log_unified2: filename snort.log, limit 128, nostamp
# syslog
output alert_syslog: LOG_AUTH LOG_ALERT
# pcap
output log_tcpdump: tcpdump.log
# database
# output database: alert, <db_type>, user=<username> password=<password> test dbname=<name> host=<hostname>
# output database: log, <db_type>, user=<username> password=<password> test dbname=<name> host=<hostname>
#
# On Debian Systems, the database configuration is kept in a separate file:
# /etc/snort/database.conf.
# This file can be empty, if you are not using any database information
# If you are using databases, please edit that file instead of this one, to
# ensure smoother upgrades to future versions of this package.
include database.conf
#
# prelude
# output alert_prelude
# metadata reference data. do not modify these lines
include classification.config
include reference.config
###################################################
# Step #7: Customize your rule set
# For more information, see Snort Manual, Writing Snort Rules
#
# NOTE: All categories are enabled in this conf file
###################################################
# site specific rules
include $RULE_PATH/local.rules
include $RULE_PATH/attack-responses.rules
include $RULE_PATH/backdoor.rules
include $RULE_PATH/bad-traffic.rules
# include $RULE_PATH/blacklist.rules
# include $RULE_PATH/botnet-cnc.rules
include $RULE_PATH/chat.rules
# include $RULE_PATH/content-replace.rules
include $RULE_PATH/ddos.rules
include $RULE_PATH/dns.rules
include $RULE_PATH/dos.rules
include $RULE_PATH/community-dos.rules
include $RULE_PATH/exploit.rules
include $RULE_PATH/community-exploit.rules
include $RULE_PATH/finger.rules
include $RULE_PATH/ftp.rules
include $RULE_PATH/community-ftp.rules
include $RULE_PATH/icmp.rules
include $RULE_PATH/icmp-info.rules
include $RULE_PATH/imap.rules
include $RULE_PATH/community-imap.rules
include $RULE_PATH/info.rules
include $RULE_PATH/misc.rules
include $RULE_PATH/multimedia.rules
include $RULE_PATH/mysql.rules
include $RULE_PATH/netbios.rules
include $RULE_PATH/nntp.rules
include $RULE_PATH/community-nntp.rules
include $RULE_PATH/oracle.rules
include $RULE_PATH/community-oracle.rules
include $RULE_PATH/other-ids.rules
include $RULE_PATH/p2p.rules
# include $RULE_PATH/phishing-spam.rules
include $RULE_PATH/policy.rules
# include $RULE_PATH/community-policy.rules
# include $RULE_PATH/community-inappropriate.rules
# include $RULE_PATH/community-game.rules
# include $RULE_PATH/community-misc.rules
include $RULE_PATH/pop2.rules
include $RULE_PATH/pop3.rules
include $RULE_PATH/rpc.rules
include $RULE_PATH/rservices.rules
# include $RULE_PATH/scada.rules
include $RULE_PATH/scan.rules
# Note: this rule is extremely chatty, enable with care
include $RULE_PATH/shellcode.rules
include $RULE_PATH/smtp.rules
include $RULE_PATH/community-smtp.rules
include $RULE_PATH/snmp.rules
# include $RULE_PATH/specific-threats.rules
# include $RULE_PATH/spyware-put.rules
include $RULE_PATH/sql.rules
include $RULE_PATH/telnet.rules
include $RULE_PATH/tftp.rules
include $RULE_PATH/virus.rules
include $RULE_PATH/community-virus.rules
include $RULE_PATH/community-bot.rules
# include $RULE_PATH/voip.rules
include $RULE_PATH/community-sip.rules
# Specific web server rules:
# include $RULE_PATH/web-activex.rules
include $RULE_PATH/web-attacks.rules
include $RULE_PATH/web-cgi.rules
include $RULE_PATH/web-client.rules
include $RULE_PATH/web-coldfusion.rules
include $RULE_PATH/web-frontpage.rules
include $RULE_PATH/web-iis.rules
include $RULE_PATH/web-misc.rules
include $RULE_PATH/web-php.rules
include $RULE_PATH/web-attacks.rules
include $RULE_PATH/community-sql-injection.rules
include $RULE_PATH/community-web-client.rules
include $RULE_PATH/community-web-dos.rules
include $RULE_PATH/community-web-iis.rules
include $RULE_PATH/community-web-misc.rules
include $RULE_PATH/community-web-php.rules
include $RULE_PATH/web-attacks.rules
include $RULE_PATH/community-sql-injection.rules
include $RULE_PATH/community-web-client.rules
include $RULE_PATH/community-web-dos.rules
include $RULE_PATH/community-web-iis.rules
include $RULE_PATH/community-web-misc.rules
include $RULE_PATH/community-web-php.rules
include $RULE_PATH/x11.rules
###################################################
# Step #8: Customize your preprocessor and decoder alerts
# For more information, see README.decoder_preproc_rules
###################################################
# decoder and preprocessor event rules
# include $PREPROC_RULE_PATH/preprocessor.rules
# include $PREPROC_RULE_PATH/decoder.rules
# include $PREPROC_RULE_PATH/sensitive-data.rules
###################################################
# Step #9: Customize your Shared Object Snort Rules
# For more information, see http://vrt-sourcefire.blogspot.com/2009/01/using-vrt-certified-shared-object-rules.html
###################################################
# dynamic library rules
# include $SO_RULE_PATH/bad-traffic.rules
# include $SO_RULE_PATH/chat.rules
# include $SO_RULE_PATH/dos.rules
# include $SO_RULE_PATH/exploit.rules
# include $SO_RULE_PATH/icmp.rules
# include $SO_RULE_PATH/imap.rules
# include $SO_RULE_PATH/misc.rules
# include $SO_RULE_PATH/multimedia.rules
# include $SO_RULE_PATH/netbios.rules
# include $SO_RULE_PATH/nntp.rules
# include $SO_RULE_PATH/pop3.rules
# include $SO_RULE_PATH/p2p.rules
# include $SO_RULE_PATH/smtp.rules
# include $SO_RULE_PATH/snmp.rules
# include $SO_RULE_PATH/specific-threats.rules
# include $SO_RULE_PATH/sql.rules
# include $SO_RULE_PATH/web-activex.rules
# include $SO_RULE_PATH/web-client.rules
# include $SO_RULE_PATH/web-iis.rules
# include $SO_RULE_PATH/web-misc.rules
# Event thresholding or suppression commands. See threshold.conf
include threshold.conf
playbooks/roles/snort/templates/etc/snort/snort.debian.conf.j2 0 → 100644
# snort.debian.config (Debian Snort configuration file)
#
# This file was generated by the post-installation script of the snort
# package using values from the debconf database.
#
# It is used for options that are changed by Debian to leave
# the original configuration files untouched.
#
# This file is automatically updated on upgrades of the snort package
# *only* if it has not been modified since the last upgrade of that package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command as root:
# dpkg-reconfigure snort
DEBIAN_SNORT_STARTUP="boot"
DEBIAN_SNORT_HOME_NET=""
DEBIAN_SNORT_OPTIONS=""
DEBIAN_SNORT_INTERFACE="eth0"
DEBIAN_SNORT_SEND_STATS="true"
DEBIAN_SNORT_STATS_RCPT="root"
DEBIAN_SNORT_STATS_THRESHOLD="1"
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