[Snort-users] HTTP reassembly problem

João Lima joao.pedro.paulino.lima at ...11827...
Wed Oct 10 11:55:00 EDT 2012


That would not be a problem for me since I have some flexibility to support
that. But as I said in the response to Joel, I'm not getting any
reassembled packet by any mean, neither am I receiving more than one packet
to the same event.

Looking at the pcap that I sent with what I want to detect, I'm only
receiving the content of packet 4 and never receiving packet 5.

João Lima

2012/10/10 Jason Brvenik <jasonb at ...1935...>

> The member packets will be in the unified2 file, not the psuedo
> packet. The tool you are using needs to support multiple packets per
> event in order for you to see them. If you use the u2boat tool in the
> tools/u2boat directory it will generate a pcap for that unified file
> that can be seen in wireshark.
>
> On Wed, Oct 10, 2012 at 11:13 AM, João Lima
> <joao.pedro.paulino.lima at ...11827...> wrote:
> > No, I never said that. For me is alerting perfectly also.
> >
> > My problem is that I want it to alert in the reassembled packet resulting
> > from stream5/http_inspect/paf.
> >
> > In the end, what I want is to receive an unified2Packet with the complete
> > HTTP POST and not only part of the HTTP POST.
> >
> > Is it possible anyway??
> >
> > Best regards,
> >
> > João Lima
> >
> >
> > 2012/10/10 Joel Esler <jesler at ...1935...>
> >>
> >> Are you saying it's not alerting?
> >>
> >> It's working for me perfectly.  Make sure you are using the snort.conf
> >> from the VRT, current versions are here:
> >>
> >> http://www.snort.org/vrt/snort-conf-configurations/
> >>
> >> That's what I am testing against.
> >>
> >>
> >> On Oct 10, 2012, at 4:52 AM, João Lima <
> joao.pedro.paulino.lima at ...11827...>
> >> wrote:
> >>
> >> Yes I can.
> >>
> >> alert tcp any any -> 192.168.8.177 8081 (msg:"action type 50";
> >> sid:1000050; content:"|3c 78 73 64 3a 53 74 61 74 75 73 55 70 64 61 74
> 65
> >> 3e|";)
> >>
> >> Sorry. Should have sent the complete rule the first time.
> >>
> >> Best regards,
> >>
> >> João Lima
> >>
> >> 2012/10/9 Joel Esler <jesler at ...1935...>
> >>>
> >>> I see the pcap, but I don't see a complete rule to test with.
> >>>
> >>> Can you provide that?
> >>>
> >>>
> >>> On Oct 9, 2012, at 5:19 PM, João Lima <
> joao.pedro.paulino.lima at ...11827...>
> >>> wrote:
> >>>
> >>> Hello,
> >>>
> >>> Does anyone can help me with this issue??
> >>>
> >>> Best regards,
> >>>
> >>> João Pedro Lima
> >>>
> >>> 2012/10/9 João Lima <joao.pedro.paulino.lima at ...11827...>
> >>>>
> >>>> 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
> >>>>>> _______________________________________________
> >>>>>> Snort-users mailing list
> >>>>>> 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!
> >>>>>
> >>>>>
> >>>>
> >>>
> >>>
> >>>
> <StatusUpdateSequence3.pcap>------------------------------------------------------------------------------
> >>>
> >>> 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_______________________________________________
> >>> Snort-users mailing list
> >>> 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!
> >>>
> >>>
> >>
> >>
> >
> >
> >
> ------------------------------------------------------------------------------
> > 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
> > _______________________________________________
> > Snort-users mailing list
> > 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!
>
>
>
> --
> Regards,
>
> Jason.
>
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