[people/teissler/ipfire-2.x.git] / config / snort / snort.conf

###################################################
# IPFire snort.conf 
#
# some parts of this file are changed/updated by the webif
###################################################
# VERSIONS : 2.9.1.1

include /etc/snort/vars

###################################################
# Step #1: Set the network variables.  For more information, see README.variables
###################################################

# taken from /etc/snort vars
#ipvar HOME_NET any

# Set up the external network addresses. Leave as "any" in most situations
ipvar EXTERNAL_NET any

# 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 [80,81,311,444,591,593,901,1220,1414,1830,2301,2381,2809,3128,3702,5250,7001,7777,7779,8000,8008,8028,8080,8088,8118,8123,8180,8181,8243,8280,8888,9090,9091,9443,9999,11371]

# 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 [22,222]

# 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/local/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
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 81 311 591 593 901 1220 1414 1830 2301 2381 2809 3128 3702 5250 7001 7777 7779 8000 8008 8028 8080 8088 8118 8123 8180 8181 8243 8280 8888 9090 9091 9443 9999 11371 } \
    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 { medium }

# 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 { 22,222 } \
                  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 { 443 444 465 563 636 989 992 993 994 995 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>

# prelude
# output alert_prelude

# metadata reference data.  do not modify these lines
include /etc/snort/rules/classification.config
include /etc/snort/rules/reference.config


###################################################
# Step #7: Customize your rule set
# For more information, see Snort Manual, Writing Snort Rules
###################################################

#
# site specific rules
#
Commit	Line	Data
767cb737	1	###################################################
89f3d66c	2	# IPFire snort.conf
75a786b6	3	#
89f3d66c	4	# some parts of this file are changed/updated by the webif
cd1a2927	5	###################################################
89f3d66c AF	6	# VERSIONS : 2.9.1.1
	7
	8	include /etc/snort/vars
767cb737	9
75a786b6 CS	10	###################################################
	11	# Step #1: Set the network variables. For more information, see README.variables
	12	###################################################
	13
8dc25f04	14	# taken from /etc/snort vars
89f3d66c	15	#ipvar HOME_NET any
767cb737	16
89f3d66c AF	17	# Set up the external network addresses. Leave as "any" in most situations
89f3d66c AF	18	ipvar EXTERNAL_NET any
767cb737	19
767cb737	20	# List of DNS servers on your network
89f3d66c	21	#ipvar DNS_SERVERS $HOME_NET
767cb737 SS	22
767cb737 SS	23	# List of SMTP servers on your network
89f3d66c	24	ipvar SMTP_SERVERS $HOME_NET
767cb737 SS	25
767cb737 SS	26	# List of web servers on your network
89f3d66c	27	ipvar HTTP_SERVERS $HOME_NET
767cb737 SS	28
767cb737 SS	29	# List of sql servers on your network
89f3d66c	30	ipvar SQL_SERVERS $HOME_NET
767cb737 SS	31
767cb737 SS	32	# List of telnet servers on your network
89f3d66c	33	ipvar TELNET_SERVERS $HOME_NET
767cb737	34
c07e938e	35	# List of ssh servers on your network
89f3d66c AF	36	ipvar SSH_SERVERS $HOME_NET
	37
	38	# List of ftp servers on your network
	39	ipvar FTP_SERVERS $HOME_NET
	40
	41	# List of sip servers on your network
	42	ipvar SIP_SERVERS $HOME_NET
767cb737	43
c07e938e	44	# List of ports you run web servers on
89f3d66c	45	portvar HTTP_PORTS [80,81,311,444,591,593,901,1220,1414,1830,2301,2381,2809,3128,3702,5250,7001,7777,7779,8000,8008,8028,8080,8088,8118,8123,8180,8181,8243,8280,8888,9090,9091,9443,9999,11371]
8dc25f04	46
75a786b6	47	# List of ports you want to look for SHELLCODE on.
767cb737 SS	48	portvar SHELLCODE_PORTS !80
767cb737 SS	49
75a786b6	50	# List of ports you might see oracle attacks on
c07e938e	51	portvar ORACLE_PORTS 1024:
89f3d66c AF	52
	53	# List of ports you want to look for SSH connections on:
	54	portvar SSH_PORTS [22,222]
	55
	56	# List of ports you run ftp servers on
	57	portvar FTP_PORTS [21,2100,3535]
	58
	59	# List of ports you run SIP servers on
	60	portvar SIP_PORTS [5060,5061,5600]
	61
75a786b6	62	# other variables, these should not be modified
89f3d66c	63	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]
767cb737 SS	64
	65	# Path to your rules files (this can be a relative path)
	66	# Note for Windows users: You are advised to make this an absolute path,
	67	# such as: c:\snort\rules
	68	var RULE_PATH /etc/snort/rules
75a786b6	69	var SO_RULE_PATH /etc/snort/so_rules
767cb737 SS	70	var PREPROC_RULE_PATH /etc/snort/preproc_rules
767cb737 SS	71
89f3d66c	72
75a786b6 CS	73	###################################################
	74	# Step #2: Configure the decoder. For more information, see README.decode
	75	###################################################
	76
767cb737	77	# Stop generic decode events:
f9866a72	78	config disable_decode_alerts
75a786b6	79
767cb737	80	# Stop Alerts on experimental TCP options
75a786b6 CS	81	config disable_tcpopt_experimental_alerts
75a786b6 CS	82
767cb737	83	# Stop Alerts on obsolete TCP options
75a786b6 CS	84	config disable_tcpopt_obsolete_alerts
75a786b6 CS	85
767cb737	86	# Stop Alerts on T/TCP alerts
89f3d66c	87	# config disable_tcpopt_ttcp_alerts
75a786b6	88
767cb737	89	# Stop Alerts on all other TCPOption type events:
f9866a72	90	config disable_tcpopt_alerts
75a786b6	91
767cb737	92	# Stop Alerts on invalid ip options
89f3d66c	93	# config disable_ipopt_alerts
75a786b6 CS	94
75a786b6 CS	95	# Alert if value in length field (IP, TCP, UDP) is greater th elength of the packet
767cb737	96	# config enable_decode_oversized_alerts
75a786b6 CS	97
75a786b6 CS	98	# Same as above, but drop packet if in Inline mode (requires enable_decode_oversized_alerts)
767cb737	99	# config enable_decode_oversized_drops
767cb737	100
75a786b6 CS	101	# Configure IP / TCP checksum mode
	102	config checksum_mode: all
	103
	104	# Configure maximum number of flowbit references. For more information, see README.flowbits
	105	# config flowbits_size: 64
	106
	107	# Configure ports to ignore
	108	# config ignore_ports: tcp 21 6667:6671 1356
	109	# config ignore_ports: udp 1:17 53
	110
c07e938e CS	111	# Configure active response for non inline operation. For more information, see REAMDE.active
c07e938e CS	112	# config response: eth0 attempts 2
89f3d66c AF	113
	114	# Configure DAQ related options for inline operation. For more information, see README.daq
	115	#
	116	# config daq: <type>
	117	# config daq_dir: <dir>
	118	# config daq_mode: <mode>
	119	# config daq_var: <var>
	120	#
	121	# <type> ::= pcap \| afpacket \| dump \| nfq \| ipq \| ipfw
	122	# <mode> ::= read-file \| passive \| inline
	123	# <var> ::= arbitrary <name>=<value passed to DAQ
	124	# <dir> ::= path as to where to look for DAQ module so's
	125
	126	# Configure specific UID and GID to run snort as after dropping privs. For more information see snort -h command line options
	127	#
	128	# config set_gid:
	129	# config set_uid:
	130
	131	# Configure default snaplen. Snort defaults to MTU of in use interface. For more information see README
	132	#
	133	# config snaplen:
	134	#
	135
	136	# Configure default bpf_file to use for filtering what traffic reaches snort. For more information see snort -h command line options (-F)
	137	#
	138	# config bpf_file:
	139	#
	140
	141	# Configure default log directory for snort to log to. For more information see snort -h command line options (-l)
	142	#
	143	# config logdir:
	144
	145
75a786b6 CS	146	###################################################
	147	# Step #3: Configure the base detection engine. For more information, see README.decode
	148	###################################################
	149
	150	# Configure PCRE match limitations
c07e938e	151	config pcre_match_limit: 3500
75a786b6 CS	152	config pcre_match_limit_recursion: 1500
	153
	154	# Configure the detection engine See the Snort Manual, Configuring Snort - Includes - Config
c07e938e	155	config detection: search-method ac-split search-optimize max-pattern-len 20
75a786b6 CS	156
	157	# Configure the event queue. For more information, see README.event_queue
	158	config event_queue: max_queue 8 log 3 order_events content_length
	159
c07e938e CS	160	###################################################
	161	# Per packet and rule latency enforcement
	162	# For more information see README.ppm
	163	###################################################
	164
	165	# Per Packet latency configuration
	166	#config ppm: max-pkt-time 250, \
	167	# fastpath-expensive-packets, \
	168	# pkt-log
	169
	170	# Per Rule latency configuration
	171	#config ppm: max-rule-time 200, \
	172	# threshold 3, \
	173	# suspend-expensive-rules, \
	174	# suspend-timeout 20, \
	175	# rule-log alert
767cb737	176
c07e938e CS	177	###################################################
	178	# Configure Perf Profiling for debugging
	179	# For more information see README.PerfProfiling
	180	###################################################
75a786b6	181
c07e938e CS	182	#config profile_rules: print all, sort avg_ticks
c07e938e CS	183	#config profile_preprocs: print all, sort avg_ticks
89f3d66c	184
cd1a2927	185	###################################################
75a786b6 CS	186	# Step #4: Configure dynamic loaded libraries.
	187	# For more information, see Snort Manual, Configuring Snort - Dynamic Modules
	188	###################################################
	189
	190	# path to dynamic preprocessor libraries
4fba936c	191	dynamicpreprocessor directory /usr/lib/snort_dynamicpreprocessor/
75a786b6 CS	192
75a786b6 CS	193	# path to base preprocessor engine
767cb737	194	dynamicengine /usr/lib/snort_dynamicengine/libsf_engine.so
cd1a2927	195
75a786b6	196	# path to dynamic rules libraries
89f3d66c	197	# dynamicdetection directory /usr/local/lib/snort_dynamicrules
767cb737	198
75a786b6 CS	199	###################################################
	200	# Step #5: Configure preprocessors
	201	# For more information, see the Snort Manual, Configuring Snort - Preprocessors
	202	###################################################
	203
c07e938e CS	204	# Inline packet normalization. For more information, see README.normalize
	205	# Does nothing in IDS mode
	206	preprocessor normalize_ip4
	207	preprocessor normalize_tcp: ips ecn stream
	208	preprocessor normalize_icmp4
89f3d66c AF	209	preprocessor normalize_ip6
89f3d66c AF	210	preprocessor normalize_icmp6
c07e938e	211
75a786b6 CS	212	# Target-based IP defragmentation. For more inforation, see README.frag3
75a786b6 CS	213	preprocessor frag3_global: max_frags 65536
c07e938e	214	preprocessor frag3_engine: policy windows detect_anomalies overlap_limit 10 min_fragment_length 100 timeout 180
767cb737	215
75a786b6	216	# Target-Based stateful inspection/stream reassembly. For more inforation, see README.stream5
89f3d66c AF	217	preprocessor stream5_global: track_tcp yes, \
	218	track_udp yes, \
	219	track_icmp no, \
	220	max_tcp 262144, \
	221	max_udp 131072, \
	222	max_active_responses 2, \
	223	min_response_seconds 5
c07e938e CS	224	preprocessor stream5_tcp: policy windows, detect_anomalies, require_3whs 180, \
	225	overlap_limit 10, small_segments 3 bytes 150, timeout 180, \
	226	ports client 21 22 23 25 42 53 79 109 110 111 113 119 135 136 137 139 143 \
	227	161 445 513 514 587 593 691 1433 1521 2100 3306 6070 6665 6666 6667 6668 6669 \
89f3d66c AF	228	7000 8181 32770 32771 32772 32773 32774 32775 32776 32777 32778 32779, \
89f3d66c AF	229	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 \
c07e938e CS	230	7801 7900 7901 7902 7903 7904 7905 7906 7908 7909 7910 7911 7912 7913 7914 7915 7916 \
	231	7917 7918 7919 7920 8000 8008 8028 8080 8088 8118 8123 8180 8243 8280 8888 9090 9091 9443 9999 11371
	232	preprocessor stream5_udp: timeout 180
75a786b6 CS	233
	234	# performance statistics. For more information, see the Snort Manual, Configuring Snort - Preprocessors - Performance Monitor
	235	# preprocessor perfmonitor: time 300 file /var/snort/snort.stats pktcnt 10000
767cb737	236
75a786b6	237	# HTTP normalization and anomaly detection. For more information, see README.http_inspect
89f3d66c	238	preprocessor http_inspect: global iis_unicode_map unicode.map 1252 compress_depth 65535 decompress_depth 65535
75a786b6	239	preprocessor http_inspect_server: server default \
c07e938e CS	240	chunk_length 500000 \
	241	server_flow_depth 0 \
	242	client_flow_depth 0 \
	243	post_depth 65495 \
	244	oversize_dir_length 500 \
	245	max_header_length 750 \
	246	max_headers 100 \
89f3d66c	247	ports { 80 81 311 591 593 901 1220 1414 1830 2301 2381 2809 3128 3702 5250 7001 7777 7779 8000 8008 8028 8080 8088 8118 8123 8180 8181 8243 8280 8888 9090 9091 9443 9999 11371 } \
c07e938e CS	248	non_rfc_char { 0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 } \
	249	enable_cookie \
	250	extended_response_inspection \
	251	inspect_gzip \
	252	normalize_utf \
	253	unlimited_decompress \
75a786b6 CS	254	apache_whitespace no \
75a786b6 CS	255	ascii no \
c07e938e	256	bare_byte no \
c07e938e CS	257	directory no \
	258	double_decode no \
	259	iis_backslash no \
	260	iis_delimiter no \
	261	iis_unicode no \
	262	multi_slash no \
89f3d66c	263	utf_8 no \
c07e938e CS	264	u_encode yes \
c07e938e CS	265	webroot no
75a786b6 CS	266
	267	# ONC-RPC normalization and anomaly detection. For more information, see the Snort Manual, Configuring Snort - Preprocessors - RPC Decode
	268	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
	269
	270	# Back Orifice detection.
	271	preprocessor bo
	272
	273	# FTP / Telnet normalization and anomaly detection. For more information, see README.ftptelnet
c07e938e	274	preprocessor ftp_telnet: global inspection_type stateful encrypted_traffic no
4fba936c	275	preprocessor ftp_telnet_protocol: telnet \
75a786b6 CS	276	ayt_attack_thresh 20 \
	277	normalize ports { 23 } \
	278	detect_anomalies
4fba936c	279	preprocessor ftp_telnet_protocol: ftp server default \
75a786b6	280	def_max_param_len 100 \
c07e938e CS	281	ports { 21 2100 3535 } \
	282	telnet_cmds yes \
	283	ignore_telnet_erase_cmds yes \
	284	ftp_cmds { ABOR ACCT ADAT ALLO APPE AUTH CCC CDUP } \
	285	ftp_cmds { CEL CLNT CMD CONF CWD DELE ENC EPRT } \
	286	ftp_cmds { EPSV ESTA ESTP FEAT HELP LANG LIST LPRT } \
	287	ftp_cmds { LPSV MACB MAIL MDTM MIC MKD MLSD MLST } \
	288	ftp_cmds { MODE NLST NOOP OPTS PASS PASV PBSZ PORT } \
	289	ftp_cmds { PROT PWD QUIT REIN REST RETR RMD RNFR } \
	290	ftp_cmds { RNTO SDUP SITE SIZE SMNT STAT STOR STOU } \
	291	ftp_cmds { STRU SYST TEST TYPE USER XCUP XCRC XCWD } \
	292	ftp_cmds { XMAS XMD5 XMKD XPWD XRCP XRMD XRSQ XSEM } \
	293	ftp_cmds { XSEN XSHA1 XSHA256 } \
	294	alt_max_param_len 0 { ABOR CCC CDUP ESTA FEAT LPSV NOOP PASV PWD QUIT REIN STOU SYST XCUP XPWD } \
	295	alt_max_param_len 200 { ALLO APPE CMD HELP NLST RETR RNFR STOR STOU XMKD } \
	296	alt_max_param_len 256 { CWD RNTO } \
75a786b6 CS	297	alt_max_param_len 400 { PORT } \
75a786b6 CS	298	alt_max_param_len 512 { SIZE } \
c07e938e CS	299	chk_str_fmt { ACCT ADAT ALLO APPE AUTH CEL CLNT CMD } \
	300	chk_str_fmt { CONF CWD DELE ENC EPRT EPSV ESTP HELP } \
	301	chk_str_fmt { LANG LIST LPRT MACB MAIL MDTM MIC MKD } \
	302	chk_str_fmt { MLSD MLST MODE NLST OPTS PASS PBSZ PORT } \
	303	chk_str_fmt { PROT REST RETR RMD RNFR RNTO SDUP SITE } \
	304	chk_str_fmt { SIZE SMNT STAT STOR STRU TEST TYPE USER } \
	305	chk_str_fmt { XCRC XCWD XMAS XMD5 XMKD XRCP XRMD XRSQ } \
	306	chk_str_fmt { XSEM XSEN XSHA1 XSHA256 } \
	307	cmd_validity ALLO < int [ char R int ] > \
	308	cmd_validity EPSV < [ { char 12 \| char A char L char L } ] > \
	309	cmd_validity MACB < string > \
75a786b6	310	cmd_validity MDTM < [ date nnnnnnnnnnnnnn[.n[n[n]]] ] string > \
c07e938e CS	311	cmd_validity MODE < char ASBCZ > \
	312	cmd_validity PORT < host_port > \
	313	cmd_validity PROT < char CSEP > \
	314	cmd_validity STRU < char FRPO [ string ] > \
	315	cmd_validity TYPE < { char AE [ char NTC ] \| char I \| char L [ number ] } >
4fba936c	316	preprocessor ftp_telnet_protocol: ftp client default \
75a786b6 CS	317	max_resp_len 256 \
75a786b6 CS	318	bounce yes \
c07e938e CS	319	ignore_telnet_erase_cmds yes \
c07e938e CS	320	telnet_cmds yes
767cb737	321
89f3d66c	322
75a786b6	323	# SMTP normalization and anomaly detection. For more information, see README.SMTP
14820894	324	preprocessor smtp: ports { 25 465 587 691 } \
c07e938e	325	inspection_type stateful \
89f3d66c AF	326	b64_decode_depth 0 \
	327	qp_decode_depth 0 \
	328	bitenc_decode_depth 0 \
	329	uu_decode_depth 0 \
	330	log_mailfrom \
	331	log_rcptto \
	332	log_filename \
	333	log_email_hdrs \
c07e938e CS	334	normalize cmds \
	335	normalize_cmds { ATRN AUTH BDAT CHUNKING DATA DEBUG EHLO EMAL ESAM ESND ESOM ETRN EVFY } \
	336	normalize_cmds { EXPN HELO HELP IDENT MAIL NOOP ONEX QUEU QUIT RCPT RSET SAML SEND SOML } \
	337	normalize_cmds { STARTTLS TICK TIME TURN TURNME VERB VRFY X-ADAT X-DRCP X-ERCP X-EXCH50 } \
	338	normalize_cmds { X-EXPS X-LINK2STATE XADR XAUTH XCIR XEXCH50 XGEN XLICENSE XQUE XSTA XTRN XUSR } \
	339	max_command_line_len 512 \
	340	max_header_line_len 1000 \
	341	max_response_line_len 512 \
	342	alt_max_command_line_len 260 { MAIL } \
	343	alt_max_command_line_len 300 { RCPT } \
	344	alt_max_command_line_len 500 { HELP HELO ETRN EHLO } \
	345	alt_max_command_line_len 255 { EXPN VRFY ATRN SIZE BDAT DEBUG EMAL ESAM ESND ESOM EVFY IDENT NOOP RSET } \
	346	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 } \
	347	valid_cmds { ATRN AUTH BDAT CHUNKING DATA DEBUG EHLO EMAL ESAM ESND ESOM ETRN EVFY } \
	348	valid_cmds { EXPN HELO HELP IDENT MAIL NOOP ONEX QUEU QUIT RCPT RSET SAML SEND SOML } \
	349	valid_cmds { STARTTLS TICK TIME TURN TURNME VERB VRFY X-ADAT X-DRCP X-ERCP X-EXCH50 } \
	350	valid_cmds { X-EXPS X-LINK2STATE XADR XAUTH XCIR XEXCH50 XGEN XLICENSE XQUE XSTA XTRN XUSR } \
	351	xlink2state { enabled }
767cb737	352
75a786b6	353	# Portscan detection. For more information, see README.sfportscan
14820894	354	preprocessor sfportscan: proto { all } memcap { 10000000 } sense_level { medium }
767cb737	355
75a786b6 CS	356	# ARP spoof detection. For more information, see the Snort Manual - Configuring Snort - Preprocessors - ARP Spoof Preprocessor
	357	# preprocessor arpspoof
	358	# preprocessor arpspoof_detect_host: 192.168.40.1 f0:0f:00:f0:0f:00
8581d1ef	359
75a786b6	360	# SSH anomaly detection. For more information, see README.ssh
89f3d66c	361	preprocessor ssh: server_ports { 22,222 } \
c07e938e	362	autodetect \
75a786b6 CS	363	max_client_bytes 19600 \
75a786b6 CS	364	max_encrypted_packets 20 \
c07e938e	365	max_server_version_len 100 \
75a786b6 CS	366	enable_respoverflow enable_ssh1crc32 \
75a786b6 CS	367	enable_srvoverflow enable_protomismatch
8581d1ef	368
75a786b6 CS	369	# SMB / DCE-RPC normalization and anomaly detection. For more information, see README.dcerpc2
	370	preprocessor dcerpc2: memcap 102400, events [co ]
	371	preprocessor dcerpc2_server: default, policy WinXP, \
	372	detect [smb [139,445], tcp 135, udp 135, rpc-over-http-server 593], \
	373	autodetect [tcp 1025:, udp 1025:, rpc-over-http-server 1025:], \
89f3d66c	374	smb_max_chain 3, smb_invalid_shares ["C$", "D$", "ADMIN$"]
767cb737	375
75a786b6 CS	376	# DNS anomaly detection. For more information, see README.dns
75a786b6 CS	377	preprocessor dns: ports { 53 } enable_rdata_overflow
767cb737	378
75a786b6	379	# SSL anomaly detection and traffic bypass. For more information, see README.ssl
89f3d66c	380	preprocessor ssl: ports { 443 444 465 563 636 989 992 993 994 995 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
767cb737	381
c07e938e CS	382	# SDF sensitive data preprocessor. For more information see README.sensitive_data
c07e938e CS	383	preprocessor sensitive_data: alert_threshold 25
767cb737	384
89f3d66c AF	385	# SIP Session Initiation Protocol preprocessor. For more information see README.sip
	386	preprocessor sip: max_sessions 10000, \
	387	ports { 5060 5061 5600 }, \
	388	methods { invite \
	389	cancel \
	390	ack \
	391	bye \
	392	register \
	393	options \
	394	refer \
	395	subscribe \
	396	update \
	397	join \
	398	info \
	399	message \
	400	notify \
	401	benotify \
	402	do \
	403	qauth \
	404	sprack \
	405	publish \
	406	service \
	407	unsubscribe \
	408	prack }, \
	409	max_uri_len 512, \
	410	max_call_id_len 80, \
	411	max_requestName_len 20, \
	412	max_from_len 256, \
	413	max_to_len 256, \
	414	max_via_len 1024, \
	415	max_contact_len 512, \
	416	max_content_len 1024
	417
	418	# IMAP preprocessor. For more information see README.imap
	419	preprocessor imap: \
	420	ports { 143 } \
	421	b64_decode_depth 0 \
	422	qp_decode_depth 0 \
	423	bitenc_decode_depth 0 \
	424	uu_decode_depth 0
	425
	426	# POP preprocessor. For more information see README.pop
	427	preprocessor pop: \
	428	ports { 110 } \
	429	b64_decode_depth 0 \
	430	qp_decode_depth 0 \
	431	bitenc_decode_depth 0 \
	432	uu_decode_depth 0
	433
75a786b6 CS	434	###################################################
	435	# Step #6: Configure output plugins
	436	# For more information, see Snort Manual, Configuring Snort - Output Modules
	437	###################################################
767cb737	438
c07e938e CS	439	# unified2
	440	# Recommended for most installs
	441	# output unified2: filename merged.log, limit 128, nostamp, mpls_event_types, vlan_event_types
	442
	443	# Additional configuration for specific types of installs
	444	# output alert_unified2: filename snort.alert, limit 128, nostamp
	445	# output log_unified2: filename snort.log, limit 128, nostamp
89f3d66c	446
75a786b6	447	# syslog
767cb737	448	# output alert_syslog: LOG_AUTH LOG_ALERT
767cb737	449
75a786b6	450	# pcap
767cb737 SS	451	# output log_tcpdump: tcpdump.log
767cb737 SS	452
75a786b6 CS	453	# database
	454	# output database: alert, <db_type>, user=<username> password=<password> test dbname=<name> host=<hostname>
	455	# output database: log, <db_type>, user=<username> password=<password> test dbname=<name> host=<hostname>
	456
75a786b6	457	# prelude
767cb737	458	# output alert_prelude
767cb737	459
75a786b6	460	# metadata reference data. do not modify these lines
767cb737	461	include /etc/snort/rules/classification.config
767cb737 SS	462	include /etc/snort/rules/reference.config
767cb737 SS	463
767cb737	464
75a786b6 CS	465	###################################################
	466	# Step #7: Customize your rule set
	467	# For more information, see Snort Manual, Writing Snort Rules
	468	###################################################
767cb737	469
89f3d66c	470	#
75a786b6	471	# site specific rules
89f3d66c	472	#