[Snort-users] HTTP reassembly problem

João Lima joao.pedro.paulino.lima at ...11827...
Tue Oct 9 11:11:18 EDT 2012


Sure,

The pcap contains the complete HTTP session of the request. What I expect
to obtain is packet 4 and 5 in just one "pseudo-packet" that represent the
complete HTTP request.

Best regards,

João Pedro Lima

2012/10/9 Russ Combs <rcombs at ...1935...>

> Can you send a pcap?
>
> On Tue, Oct 9, 2012 at 10:29 AM, João Lima <
> joao.pedro.paulino.lima at ...11827...> wrote:
>
>> Hello,
>>
>> I'm having a little problem with the reassembly of HTTP PDUs...
>>
>> My scenario is the following: I have one HTTP POST that is spread across
>>  two TCP packets... What I'm trying to do is to find one message an alert
>> when it is found in order to be able to process it in a custom system...
>>
>> However, I've already tried almost every configuration of stream5 and
>> http_inspect, and I'm only able to retrieve the first packet of the two
>> that compose the HTTP POST... All the documentation says it is possible
>> that Snort is able to reassemble  packets, but I've found no information
>> about its ability to return the send a unified2Packet with the reassembled
>> packet...
>>
>> The HTTP server is running on port 8081...
>>
>> Can you tell me if I'm missing something either on the snort
>> configuration or in the detection rule??
>>
>> Rule used to detect the packet:
>>
>> "alert tcp any any -> 192.168.8.177 any (msg:"Action type 50";
>> sid:1000050; content:"|3c 78 73 64 .......|";)"
>>
>> My snort.conf is below:
>>
>> # Setup the network addresses you are protecting
>> ipvar HOME_NET [192.168.0.0/16,10.0.0.0/8,172.16.0.0/12]
>>
>> # 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 $HOME_NET
>>
>> # List of ports you run web servers on
>> portvar HTTP_PORTS
>> [80,81,311,591,593,901,1220,1414,1830,2301,2381,2809,3128,3702,4343,5250,7001,7145,7510,7777,7779,8000,8008,8014,8028,8080,8081,8088,8118,8123,8180,8181,8243,8280,8800,8888,8899,9080,9090,9091,9443,9999,11371,55555]
>>
>> # List of ports you want to look for SHELLCODE on.
>> portvar SHELLCODE_PORTS !80
>>
>> # List of ports you might see oracle attacks on
>> portvar ORACLE_PORTS 1024:
>>
>> # List of ports you want to look for SSH connections on:
>> portvar SSH_PORTS 22
>>
>> # List of ports you run ftp servers on
>> portvar FTP_PORTS [21,2100,3535]
>>
>> # List of ports you run SIP servers on
>> portvar SIP_PORTS [5060,5061,5600]
>>
>> # List of file data ports for file inspection
>> portvar FILE_DATA_PORTS [$HTTP_PORTS,110,143]
>>
>> # List of GTP ports for GTP preprocessor
>> portvar GTP_PORTS [2123,2152,3386]
>>
>> # 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
>> ]
>>
>> include /etc/nsm/CSIS/local.variables
>>
>> # 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/nsm/rules
>> var SO_RULE_PATH /etc/nsm/rules
>> var PREPROC_RULE_PATH /etc/nsm/preproc_rules
>>
>> # If you are using reputation preprocessor set these
>> # Currently there is a bug with relative paths, they are relative to
>> where snort is
>> # not relative to snort.conf like the above variables
>> # This is completely inconsistent with how other vars work, BUG 89986
>> # Set the absolute path appropriately
>> var WHITE_LIST_PATH /etc/nsm/rules
>> var BLACK_LIST_PATH /etc/nsm/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
>>
>> ###################################################
>> ## Configure GTP if it is to be used.
>> ## For more information, see README.GTP
>> ####################################################
>>
>> # config enable_gtp
>>
>> ###################################################
>> # 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
>>
>> ###################################################
>> # Configure protocol aware flushing
>> # For more information see README.stream5
>> ###################################################
>> config paf_max: 16000
>>
>> ###################################################
>> # Step #4: Configure dynamic loaded libraries.
>> # For more information, see Snort Manual, Configuring Snort - Dynamic
>> Modules
>> ###################################################
>>
>> # path to dynamic preprocessor libraries
>> dynamicpreprocessor directory /usr/local/lib/snort_dynamicpreprocessor/
>>
>> # path to base preprocessor engine
>> dynamicengine /usr/local/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
>> ###################################################
>>
>> # GTP Control Channle Preprocessor. For more information, see README.GTP
>> # preprocessor gtp: ports { 2123 3386 2152 }
>>
>> # 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 4343 5250 7907 7001 7145 7510 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 8014 8028 8080 8081 8088 8118 8123
>> 8180 8243 8280 8800 8888 8899 9080 9090 9091 9443 9999 11371 55555
>> preprocessor stream5_udp: timeout 180
>>
>> # performance statistics.  For more information, see the Snort Manual,
>> Configuring Snort - Preprocessors - Performance Monitor
>> preprocessor perfmonitor: time 300 file
>> /nsm/sensor_data/onion-desktop-eth0/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 \
>>     http_methods { GET POST PUT SEARCH MKCOL COPY MOVE LOCK UNLOCK NOTIFY
>> POLL BCOPY BDELETE BMOVE LINK UNLINK OPTIONS HEAD DELETE TRACE TRACK
>> CONNECT SOURCE SUBSCRIBE UNSUBSCRIBE PROPFIND PROPPATCH BPROPFIND
>> BPROPPATCH RPC_CONNECT PROXY_SUCCESS BITS_POST CCM_POST SMS_POST
>> RPC_IN_DATA RPC_OUT_DATA RPC_ECHO_DATA } \
>>     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 \
>>     max_spaces 0 \
>>     small_chunk_length { 10 5 } \
>>     ports { 80 81 311 591 593 901 1220 1414 1830 2301 2381 2809 3128 3702
>> 4343 5250 7001 7145 7510 7777 7779 8000 8008 8014 8028 8080 8081 8088 8118
>> 8123 8180 8181 8243 8280 8800 8888 8899 9080 9090 9091 9443 9999 11371
>> 55555 } \
>>     non_rfc_char { 0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 } \
>>     enable_cookie \
>>     extended_response_inspection \
>>     inspect_gzip \
>>     normalize_utf \
>>     unlimited_decompress \
>>     normalize_javascript \
>>     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 check_encrypted
>> 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 40000, \
>>    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 2048
>>
>> # 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
>>
>> # Modbus preprocessor. For more information see README.modbus
>> preprocessor modbus: ports { 502 }
>>
>> # DNP3 preprocessor. For more information see README.dnp3
>> preprocessor dnp3: ports { 20000 } \
>>    memcap 262144 \
>>    check_crc
>>
>> # Reputation preprocessor. For more information see README.reputation
>> preprocessor reputation: \
>>    memcap 500, \
>>    priority whitelist, \
>>    nested_ip inner, \
>>    whitelist $WHITE_LIST_PATH/white_list.rules, \
>>    blacklist $BLACK_LIST_PATH/black_list.rules
>>
>> ###################################################
>> # Step #6: Configure output plugins
>> # For more information, see Snort Manual, Configuring Snort - Output
>> Modules
>> ###################################################
>>
>> # unified2
>> # Recommended for most installs
>> output unified2: filename snort.unified2, limit 128
>>
>> include /etc/nsm/CSIS/fifo.output
>>
>> # 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 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/specificationBased.rules
>>
>> # rules downloaded by PulledPork
>> include $RULE_PATH/downloaded.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/so_rules.rules
>>
>> # Event thresholding or suppression commands. See threshold.conf
>> include threshold.conf
>>
>>
>>
>> ------------------------------------------------------------------------------
>> Don't let slow site performance ruin your business. Deploy New Relic APM
>> Deploy New Relic app performance management and know exactly
>> what is happening inside your Ruby, Python, PHP, Java, and .NET app
>> Try New Relic at no cost today and get our sweet Data Nerd shirt too!
>> http://p.sf.net/sfu/newrelic-dev2dev
>> _______________________________________________
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>> Snort-users at lists.sourceforge.net
>> Go to this URL to change user options or unsubscribe:
>> https://lists.sourceforge.net/lists/listinfo/snort-users
>> Snort-users list archive:
>> http://www.geocrawler.com/redir-sf.php3?list=snort-users
>>
>> Please visit http://blog.snort.org to stay current on all the latest
>> Snort news!
>>
>
>
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