[Snort-users] HTTP reassembly problem

João Lima joao.pedro.paulino.lima at ...11827...
Wed Oct 10 13:35:52 EDT 2012


Ok I think it is getting somewhere...

Using the -A cmg option with the tweaked rule Russ sent me I see that the
alert is being sent on the reassembled packet...

However, when I remove the -A cmg option to have the output being sent to
unified2 the packet suddenly does not appear...

When I inject the pcap on the network, the only thing I receive in unified2
is the unified2Event and never receive the unified2Packet...

Is it needed extra configuration to send reassembled packets to unified2??

Thank you in advance for your help. You have been great.

João Lima

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

> Make sure that you have port 8081 configured in both stream5_tcp and
> http_inspect.  You will need something like this for stream5:
>
> ports both 8081 ...
> or
> ports client 8081 ...
>
> Then, as was mentioned earlier, -A cmg will indicate "Stream reassembled
> packet" if you actually alert on such a packet.  The following update to
> your rule would ensure that:
>
> alert tcp any any -> 192.168.8.177 any (msg:"Action type 50"; sid:1000050;
> content:"|3c 78 73 64 |"; content:"</soapenv:Envelope>";)
>
> You can also add show_rebuilt_packets to stream5_global and use with -A
> cmg to see reassembled packets so you know how to tweak your rule.
>
> Hope that helps.
> Russ
>
>
> On Wed, Oct 10, 2012 at 11:55 AM, João Lima <
> joao.pedro.paulino.lima at ...11827...> wrote:
>
>> 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.
>>>
>>
>>
>>
>> ------------------------------------------------------------------------------
>> 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!
>>
>
>
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