[Snort-users] snort black list issue

anton van der leun anton at ...17621...
Tue Aug 2 10:21:14 EDT 2016




Hi Hui,



Many thanks for your interest in this issue !



apologies for duplicating my last email, reason was some misbehaviour of my outlook client ....



Anyway, here are the results of the test and info you asked.



I did the following:
1. start snort in foreground mode
2. ping a ip address that was not on the blacklist
3. ping a ip address that was on the blacklist
4. telnet to port 80 of ip address on blacklist (succesfull)

5. stop snort with control-C



= = = = = = = = = = = = = screen of test client =================
root at ...17622...:/usr/share/z-push# ping ping.xs4all.nl
PING ping.xs4all.nl (194.109.6.8) 56(84) bytes of data.
64 bytes from ping.xs4all.nl (194.109.6.8): icmp_req=1 ttl=56 time=22.2 ms
64 bytes from ping.xs4all.nl (194.109.6.8): icmp_req=2 ttl=56 time=31.8 ms
64 bytes from ping.xs4all.nl (194.109.6.8): icmp_req=3 ttl=56 time=27.4 ms
64 bytes from ping.xs4all.nl (194.109.6.8): icmp_req=4 ttl=56 time=24.8 ms
64 bytes from ping.xs4all.nl (194.109.6.8): icmp_req=5 ttl=56 time=31.0 ms
^C
--- ping.xs4all.nl ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4005ms
rtt min/avg/max/mdev = 22.269/27.506/31.875/3.637 ms
root at ...17622...:/usr/share/z-push# ping 5.157.87.137 



PING 5.157.87.137 (5.157.87.137) 56(84) bytes of data.
^C
--- 5.157.87.137 ping statistics ---
11 packets transmitted, 0 received, 100% packet loss, time 10080ms



root at ...17622...:/usr/share/z-push# telnet 5.157.87.137 80
Trying 5.157.87.137...
Connected to 5.157.87.137.
Escape character is '^]'.

^]
telnet> quit
Connection closed.
root at ...17622...:/usr/share/z-push#

= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =



below is log of starting snort and stopping after client test


[root at ...17623... scripts]# /usr/local/bin/snort -c /etc/snort/snort.conf -i enp0s16f0u1:enp4s0u3 --daq-dir /usr/local/lib/daq --daq pfring --daq-var clusterid=10,11 -Q --daq-var timeout=10 --daq-var watermark=2 
Enabling inline operation
Running in IDS mode

--== Initializing Snort ==--
Initializing Output Plugins!
Initializing Preprocessors!
Initializing Plug-ins!
Parsing Rules file "/etc/snort/snort.conf"
PortVar 'HTTP_PORTS' defined : [ 80:81 311 383 591 593 901 1220 1414 1741 1830 2301 2381 2809 3037 3128 3702 4343 4848 5250 6988 7000:7001 7144:7145 7510 7777 7779 8000 8008 8014 8028 8080 8085 8088 8090 8118 8123 8180:8181 8243 8280 8300 8800 8888 8899 9000 9060 9080 9090:9091 9443 9999 11371 34443:34444 41080 50002 55555 ]
PortVar 'SHELLCODE_PORTS' defined : [ 0:79 81:65535 ]
PortVar 'ORACLE_PORTS' defined : [ 1024:65535 ]
PortVar 'SSH_PORTS' defined : [ 22 ]
PortVar 'FTP_PORTS' defined : [ 21 2100 3535 ]
PortVar 'SIP_PORTS' defined : [ 5060:5061 5600 ]
PortVar 'FILE_DATA_PORTS' defined : [ 80:81 110 143 311 383 591 593 901 1220 1414 1741 1830 2301 2381 2809 3037 3128 3702 4343 4848 5250 6988 7000:7001 7144:7145 7510 7777 7779 8000 8008 8014 8028 8080 8085 8088 8090 8118 8123 8180:8181 8243 8280 8300 8800 8888 8899 9000 9060 9080 9090:9091 9443 9999 11371 34443:34444 41080 50002 55555 ]
PortVar 'GTP_PORTS' defined : [ 2123 2152 3386 ]
Detection:
 Search-Method = AC-Full-Q
 Split Any/Any group = enabled
 Search-Method-Optimizations = enabled
 Maximum pattern length = 20
Tagged Packet Limit: 256
Loading dynamic engine /usr/local/lib/snort_dynamicengine/libsf_engine.so... done
Loading all dynamic preprocessor libs from /usr/local/lib/snort_dynamicpreprocessor/...
 Loading dynamic preprocessor library /usr/local/lib/snort_dynamicpreprocessor//libsf_pop_preproc.so... done
 Loading dynamic preprocessor library /usr/local/lib/snort_dynamicpreprocessor//libsf_imap_preproc.so... done
 Loading dynamic preprocessor library /usr/local/lib/snort_dynamicpreprocessor//libsf_smtp_preproc.so... done
 Loading dynamic preprocessor library /usr/local/lib/snort_dynamicpreprocessor//libsf_ssh_preproc.so... done
 Loading dynamic preprocessor library /usr/local/lib/snort_dynamicpreprocessor//libsf_dns_preproc.so... done
 Loading dynamic preprocessor library /usr/local/lib/snort_dynamicpreprocessor//libsf_ssl_preproc.so... done
 Loading dynamic preprocessor library /usr/local/lib/snort_dynamicpreprocessor//libsf_sdf_preproc.so... done
 Loading dynamic preprocessor library /usr/local/lib/snort_dynamicpreprocessor//libsf_reputation_preproc.so... done
 Loading dynamic preprocessor library /usr/local/lib/snort_dynamicpreprocessor//libsf_dnp3_preproc.so... done
 Loading dynamic preprocessor library /usr/local/lib/snort_dynamicpreprocessor//libsf_appid_preproc.so... done
 Loading dynamic preprocessor library /usr/local/lib/snort_dynamicpreprocessor//libsf_ftptelnet_preproc.so... done
 Loading dynamic preprocessor library /usr/local/lib/snort_dynamicpreprocessor//libsf_dce2_preproc.so... done
 Loading dynamic preprocessor library /usr/local/lib/snort_dynamicpreprocessor//libsf_sip_preproc.so... done
 Loading dynamic preprocessor library /usr/local/lib/snort_dynamicpreprocessor//libsf_gtp_preproc.so... done
 Loading dynamic preprocessor library /usr/local/lib/snort_dynamicpreprocessor//libsf_modbus_preproc.so... done
 Finished Loading all dynamic preprocessor libs from /usr/local/lib/snort_dynamicpreprocessor/
Log directory = /var/log/snort
Normalizer config:
 ip4: on
 ip4::df: off
 ip4::rf: off
 ip4::tos: off
 ip4::trim: off
 ip4::ttl: on (min=1, new=5)
Normalizer config:
 tcp: on
 tcp::ecn: stream
 tcp::block: on
 tcp::rsv: on
 tcp::pad: on
tcp::req_urg: on
tcp::req_pay: on
tcp::req_urp: off
 tcp::urp: on
 tcp::opt: off
 tcp::ips: on
tcp::trim_syn: off
tcp::trim_rst: off
tcp::trim_win: off
tcp::trim_mss: off
Normalizer config:
 icmp4: on
Normalizer config:
 ip6: on
 ip6::hops: on (min=1, new=5)
Normalizer config:
 icmp6: on
Frag3 global config:
 Max frags: 65536
 Fragment memory cap: 4194304 bytes
Frag3 engine config:
 Bound Address: default
 Target-based policy: WINDOWS
 Fragment timeout: 180 seconds
 Fragment min_ttl: 1
 Fragment Anomalies: Alert
 Overlap Limit: 10
 Min fragment Length: 100
 Max Expected Streams: 768
Stream global config:
 Track TCP sessions: ACTIVE
 Max TCP sessions: 262144
 TCP cache pruning timeout: 30 seconds
 TCP cache nominal timeout: 3600 seconds
 Memcap (for reassembly packet storage): 8388608
 Track UDP sessions: ACTIVE
 Max UDP sessions: 131072
 UDP cache pruning timeout: 30 seconds
 UDP cache nominal timeout: 180 seconds
 Track ICMP sessions: INACTIVE
 Track IP sessions: INACTIVE
 Log info if session memory consumption exceeds 1048576
 Send up to 2 active responses
 Wait at least 5 seconds between responses
 Protocol Aware Flushing: ACTIVE
 Maximum Flush Point: 16000
Stream TCP Policy config:
 Bound Address: default
 Reassembly Policy: WINDOWS
 Timeout: 180 seconds
 Limit on TCP Overlaps: 10
 Maximum number of bytes to queue per session: 1048576
 Maximum number of segs to queue per session: 2621
 Options:
 Require 3-Way Handshake: YES
 3-Way Handshake Timeout: 180
 Detect Anomalies: YES
 Reassembly Ports:
 21 client (Footprint-IPS) 
 22 client (Footprint-IPS) 
 23 client (Footprint-IPS) 
 25 client (Footprint-IPS) 
 42 client (Footprint-IPS) 
 53 client (Footprint-IPS) 
 79 client (Footprint-IPS) 
 80 client (Footprint-IPS) server (Footprint-IPS)
 81 client (Footprint-IPS) server (Footprint-IPS)
 109 client (Footprint-IPS) 
 110 client (Footprint-IPS) 
 111 client (Footprint-IPS) 
 113 client (Footprint-IPS) 
 119 client (Footprint-IPS) 
 135 client (Footprint-IPS) 
 136 client (Footprint-IPS) 
 137 client (Footprint-IPS) 
 139 client (Footprint-IPS) 
 143 client (Footprint-IPS) 
 161 client (Footprint-IPS) 
 additional ports configured but not printed.
Stream UDP Policy config:
 Timeout: 180 seconds
HttpInspect Config:
 GLOBAL CONFIG
 Detect Proxy Usage: NO
 IIS Unicode Map Filename: /etc/snort/unicode.map
 IIS Unicode Map Codepage: 1252
 Memcap used for logging URI and Hostname: 150994944
 Max Gzip Memory: 838860
 Max Gzip Sessions: 1807
 Gzip Compress Depth: 65535
 Gzip Decompress Depth: 65535
 DEFAULT SERVER CONFIG:
 Server profile: All
 Ports (PAF): 80 81 311 383 591 593 901 1220 1414 1741 1830 2301 2381 2809 3037 3128 3702 4343 4848 5250 6988 7000 7001 7144 7145 7510 7777 7779 8000 8008 8014 8028 8080 8085 8088 8090 8118 8123 8180 8181 8243 8280 8300 8800 8888 8899 9000 9060 9080 9090 9091 9443 9999 11371 34443 34444 41080 50002 55555 
 Server Flow Depth: 0
 Client Flow Depth: 0
 Max Chunk Length: 500000
 Small Chunk Length Evasion: chunk size <= 10, threshold >= 5 times
 Max Header Field Length: 750
 Max Number Header Fields: 100
 Max Number of WhiteSpaces allowed with header folding: 200
 Inspect Pipeline Requests: YES
 URI Discovery Strict Mode: NO
 Allow Proxy Usage: NO
 Disable Alerting: NO
 Oversize Dir Length: 500
 Only inspect URI: NO
 Normalize HTTP Headers: NO
 Inspect HTTP Cookies: YES
 Inspect HTTP Responses: YES
 Extract Gzip from responses: YES
 Decompress response files: 
 Unlimited decompression of gzip data from responses: YES
 Normalize Javascripts in HTTP Responses: YES
 Max Number of WhiteSpaces allowed with Javascript Obfuscation in HTTP responses: 200
 Normalize HTTP Cookies: NO
 Enable XFF and True Client IP: NO
 Log HTTP URI data: NO
 Log HTTP Hostname data: NO
 Extended ASCII code support in URI: NO
 Ascii: YES alert: NO
 Double Decoding: YES alert: NO
 %U Encoding: YES alert: YES
 Bare Byte: YES alert: NO
 UTF 8: YES alert: NO
 IIS Unicode: YES alert: NO
 Multiple Slash: YES alert: NO
 IIS Backslash: YES alert: NO
 Directory Traversal: YES alert: NO
 Web Root Traversal: YES alert: NO
 Apache WhiteSpace: YES alert: NO
 IIS Delimiter: YES alert: NO
 IIS Unicode Map: GLOBAL IIS UNICODE MAP CONFIG
 Non-RFC Compliant Characters: 0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 
 Whitespace Characters: 0x09 0x0b 0x0c 0x0d 
rpc_decode arguments:
 Ports to decode RPC on: 111 32770 32771 32772 32773 32774 32775 32776 32777 32778 32779 
 alert_fragments: INACTIVE
 alert_large_fragments: INACTIVE
 alert_incomplete: INACTIVE
 alert_multiple_requests: INACTIVE
FTPTelnet Config:
 GLOBAL CONFIG
 Inspection Type: stateful
 Check for Encrypted Traffic: YES alert: NO
 Continue to check encrypted data: YES
 TELNET CONFIG:
 Ports: 23 
 Are You There Threshold: 20
 Normalize: YES
 Detect Anomalies: YES
 FTP CONFIG:
 FTP Server: default
 Ports (PAF): 21 2100 3535 
 Check for Telnet Cmds: YES alert: YES
 Ignore Telnet Cmd Operations: YES alert: YES
 Ignore open data channels: NO
 FTP Client: default
 Check for Bounce Attacks: YES alert: YES
 Check for Telnet Cmds: YES alert: YES
 Ignore Telnet Cmd Operations: YES alert: YES
 Max Response Length: 256
SMTP Config:
 Ports: 25 465 587 691 
 Inspection Type: Stateful
 Normalize: ATRN AUTH BDAT DATA DEBUG EHLO EMAL ESAM ESND ESOM ETRN EVFY EXPN HELO HELP IDENT MAIL NOOP ONEX QUEU QUIT RCPT RSET SAML SEND STARTTLS SOML TICK TIME TURN TURNME VERB VRFY X-EXPS XADR XAUTH XCIR XEXCH50 XGEN XLICENSE X-LINK2STATE XQUE XSTA XTRN XUSR CHUNKING X-ADAT X-DRCP X-ERCP X-EXCH50 
 Ignore Data: No
 Ignore TLS Data: No
 Ignore SMTP Alerts: No
 Max Command Line Length: 512
 Max auth Command Line Length: 1000
 Max Specific Command Line Length: 
 ATRN:255 AUTH:246 BDAT:255 DATA:246 DEBUG:255 
 EHLO:500 EMAL:255 ESAM:255 ESND:255 ESOM:255 
 ETRN:246 EVFY:255 EXPN:255 HELO:500 HELP:500 
 IDENT:255 MAIL:260 NOOP:255 ONEX:246 QUEU:246 
 QUIT:246 RCPT:300 RSET:246 SAML:246 SEND:246 
 SIZE:255 STARTTLS:246 SOML:246 TICK:246 TIME:246 
 TURN:246 TURNME:246 VERB:246 VRFY:255 X-EXPS:246 
 XADR:246 XAUTH:246 XCIR:246 XEXCH50:246 XGEN:246 
 XLICENSE:246 X-LINK2STATE:246 XQUE:246 XSTA:246 XTRN:246 
 XUSR:246 
 Max Header Line Length: 1000
 Max Response Line Length: 512
 X-Link2State Alert: Yes
 Drop on X-Link2State Alert: No
 Alert on commands: None
 Alert on unknown commands: No
 SMTP Memcap: 838860
 MIME Max Mem: 838860
 Base64 Decoding: Enabled
 Base64 Decoding Depth: Unlimited
 Quoted-Printable Decoding: Enabled
 Quoted-Printable Decoding Depth: Unlimited
 Unix-to-Unix Decoding: Enabled
 Unix-to-Unix Decoding Depth: Unlimited
 Non-Encoded MIME attachment Extraction: Enabled
 Non-Encoded MIME attachment Extraction Depth: Unlimited
 Log Attachment filename: Enabled
 Log MAIL FROM Address: Enabled
 Log RCPT TO Addresses: Enabled
 Log Email Headers: Enabled
 Email Hdrs Log Depth: 1464
SSH config: 
 Autodetection: ENABLED
 Challenge-Response Overflow Alert: ENABLED
 SSH1 CRC32 Alert: ENABLED
 Server Version String Overflow Alert: ENABLED
 Protocol Mismatch Alert: ENABLED
 Bad Message Direction Alert: DISABLED
 Bad Payload Size Alert: DISABLED
 Unrecognized Version Alert: DISABLED
 Max Encrypted Packets: 20 
 Max Server Version String Length: 100 
 MaxClientBytes: 19600 (Default) 
 Ports:
 22
DCE/RPC 2 Preprocessor Configuration
 Global Configuration
 DCE/RPC Defragmentation: Enabled
 Memcap: 102400 KB
 Events: co 
 SMB Fingerprint policy: Disabled
 Server Default Configuration
 Policy: WinXP
 Detect ports (PAF)
 SMB: 139 445 
 TCP: 135 
 UDP: 135 
 RPC over HTTP server: 593 
 RPC over HTTP proxy: None
 Autodetect ports (PAF)
 SMB: None
 TCP: 1025-65535 
 UDP: 1025-65535 
 RPC over HTTP server: 1025-65535 
 RPC over HTTP proxy: None
 Invalid SMB shares: C$ D$ ADMIN$ 
 Maximum SMB command chaining: 3 commands
 SMB file inspection: Disabled
DNS config: 
 DNS Client rdata txt Overflow Alert: ACTIVE
 Obsolete DNS RR Types Alert: INACTIVE
 Experimental DNS RR Types Alert: INACTIVE
 Ports: 53
SSLPP config:
 Encrypted packets: not inspected
 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
 Server side data is trusted
 Maximum SSL Heartbeat length: 0
Sensitive Data preprocessor config: 
 Global Alert Threshold: 25
 Masked Output: DISABLED
SIP config: 
 Max number of sessions: 40000 
 Max number of dialogs in a session: 4 (Default) 
 Status: ENABLED
 Ignore media channel: DISABLED
 Max URI length: 512 
 Max Call ID length: 80 
 Max Request name length: 20 (Default) 
 Max From length: 256 (Default) 
 Max To length: 256 (Default) 
 Max Via length: 1024 (Default) 
 Max Contact length: 512 
 Max Content length: 2048 
 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
IMAP Config:
 Ports: 143 
 IMAP Memcap: 838860
 MIME Max Mem: 838860
 Base64 Decoding: Enabled
 Base64 Decoding Depth: Unlimited
 Quoted-Printable Decoding: Enabled
 Quoted-Printable Decoding Depth: Unlimited
 Unix-to-Unix Decoding: Enabled
 Unix-to-Unix Decoding Depth: Unlimited
 Non-Encoded MIME attachment Extraction: Enabled
 Non-Encoded MIME attachment Extraction Depth: Unlimited
POP Config:
 Ports: 110 
 POP Memcap: 838860
 MIME Max Mem: 838860
 Base64 Decoding: Enabled
 Base64 Decoding Depth: Unlimited
 Quoted-Printable Decoding: Enabled
 Quoted-Printable Decoding Depth: Unlimited
 Unix-to-Unix Decoding: Enabled
 Unix-to-Unix Decoding Depth: Unlimited
 Non-Encoded MIME attachment Extraction: Enabled
 Non-Encoded MIME attachment Extraction Depth: Unlimited
Modbus config: 
 Ports:
 502
DNP3 config: 
 Memcap: 262144
 Check Link-Layer CRCs: ENABLED
 Ports:
 20000
Reputation config: 
 Processing whitelist file /etc/snort/rules/white_list.rules
 (15) => Re-defined address: '95.100.97.40'
 Reputation entries loaded: 14, invalid: 0, re-defined: 1 (from file /etc/snort/rules/white_list.rules)
 Processing blacklist file /etc/snort/rules/black_list.rules
 Reputation entries loaded: 10867, invalid: 0, re-defined: 0 (from file /etc/snort/rules/black_list.rules)
 Processing blacklist file /etc/snort/rules/black_list_local.rules
 Reputation entries loaded: 9, invalid: 0, re-defined: 0 (from file /etc/snort/rules/black_list_local.rules)
 Reputation total memory usage: 2257540 bytes
 Reputation total entries loaded: 10890, invalid: 0, re-defined: 1
 Memcap: 500 (Default) M bytes 
 Scan local network: ENABLED
 Reputation priority: whitelist(Default) 
 Nested IP: inner (Default) 
 White action: trust 
 Shared memory is Not supported.


+++++++++++++++++++++++++++++++++++++++++++++++++++
Initializing rule chains...
WARNING: /etc/snort/rules/snort.rules(590) threshold (in rule) is deprecated; use detection_filter instead.

WARNING: /etc/snort/rules/local.rules(14) GID 1 SID 1009992 in rule duplicates previous rule. Ignoring old rule.

31509 Snort rules read
 31127 detection rules
 150 decoder rules
 231 preprocessor rules
31508 Option Chains linked into 3577 Chain Headers
0 Dynamic rules
+++++++++++++++++++++++++++++++++++++++++++++++++++

+-------------------[Rule Port Counts]---------------------------------------
| tcp udp icmp ip
| src 5565 115 0 0
| dst 17103 3872 0 0
| any 3520 1353 41 15
| nc 1728 1220 1 11
| s+d 89 72 0 0
+----------------------------------------------------------------------------

+-----------------------[detection-filter-config]------------------------------
| memory-cap : 1048576 bytes
+-----------------------[detection-filter-rules]-------------------------------
-------------------------------------------------------------------------------

+-----------------------[rate-filter-config]-----------------------------------
| memory-cap : 1048576 bytes
+-----------------------[rate-filter-rules]------------------------------------
| none
-------------------------------------------------------------------------------

+-----------------------[event-filter-config]----------------------------------
| memory-cap : 1048576 bytes
+-----------------------[event-filter-global]----------------------------------
| none
+-----------------------[event-filter-local]-----------------------------------
| gen-id=1 sig-id=2522117 type=Limit tracking=src count=1 seconds=60 
| gen-id=1 sig-id=2522094 type=Limit tracking=src count=1 seconds=60 
| gen-id=1 sig-id=2403318 type=Limit tracking=src count=1 seconds=3600
| gen-id=1 sig-id=2520142 type=Limit tracking=src count=1 seconds=60 
| gen-id=1 sig-id=2001858 type=Limit tracking=src count=1 seconds=360
| gen-id=1 sig-id=2404070 type=Limit tracking=src count=1 seconds=3600
| gen-id=1 sig-id=2522294 type=Limit tracking=src count=1 seconds=60 
| gen-id=1 sig-id=2400025 type=Limit tracking=src count=1 seconds=3600
| gen-id=1 sig-id=2523174 type=Limit tracking=src count=1 seconds=60


 <DELETED FOR CLARITY>


| gen-id=1 sig-id=2403358 type=Limit tracking=src count=1 seconds=3600
| gen-id=1 sig-id=2523037 type=Limit tracking=src count=1 seconds=60 
| gen-id=1 sig-id=2404088 type=Limit tracking=src count=1 seconds=3600
| gen-id=1 sig-id=2523309 type=Limit tracking=src count=1 seconds=60 
| gen-id=1 sig-id=2404591 type=Limit tracking=src count=1 seconds=3600
| gen-id=1 sig-id=2020513 type=Both tracking=src count=1 seconds=60 
+-----------------------[suppression]------------------------------------------
| none
-------------------------------------------------------------------------------
Rule application order: activation->dynamic->pass->drop->sdrop->reject->alert->log
Verifying Preprocessor Configurations!
WARNING: flowbits key 'smb.req.ascii' is set but not ever checked.
WARNING: flowbits key 'file.drm.f4v' is set but not ever checked.
WARNING: flowbits key 'zenworks_opcode' is set but not ever checked.
WARNING: flowbits key 'groupwise.request' is set but not ever checked.
WARNING: flowbits key 'file.mppl' is set but not ever checked.
WARNING: flowbits key 'file.dws' is set but not ever checked.
WARNING: flowbits key 'file.cue' is set but not ever checked.
WARNING: flowbits key 'file.junction' is set but not ever checked.
WARNING: flowbits key 'file.asx' is set but not ever checked.
WARNING: flowbits key 'file.kvl' is set but not ever checked.
WARNING: flowbits key 'file.ram' is set but not ever checked.
WARNING: flowbits key 'file.file.jpeg' is set but not ever checked.
WARNING: flowbits key 'file.jar.agent_helper' is set but not ever checked.
WARNING: flowbits key 'ms.packager' is set but not ever checked.
WARNING: flowbits key 'file.fpx' is set but not ever checked.
WARNING: flowbits key 'file.aiff' is set but not ever checked.
WARNING: flowbits key 'file.xfdl' is set but not ever checked.
WARNING: flowbits key 'NuclearEK' is set but not ever checked.

<DELETED FOR CLARITY>


WARNING: flowbits key 'file.wpd' is set but not ever checked.
WARNING: flowbits key 'file.crx' is set but not ever checked.
WARNING: flowbits key 'file.dxf' is set but not ever checked.
WARNING: flowbits key 'file.gzip' is set but not ever checked.
726 out of 1024 flowbits in use.

[ Port Based Pattern Matching Memory ]
+- [ Aho-Corasick Summary ] -------------------------------------
| Storage Format : Full-Q 
| Finite Automaton : DFA
| Alphabet Size : 256 Chars
| Sizeof State : Variable (1,2,4 bytes)
| Instances : 579
| 1 byte states : 554
| 2 byte states : 25
| 4 byte states : 0
| Characters : 602729
| States : 393771
| Transitions : 55409040
| State Density : 55.0%
| Patterns : 35428
| Match States : 35520
| Memory (MB) : 210.41
| Patterns : 3.85
| Match Lists : 11.90
| DFA
| 1 byte states : 3.29
| 2 byte states : 190.30
| 4 byte states : 0.00
+----------------------------------------------------------------
[ Number of patterns truncated to 20 bytes: 5718 ]

Packet Performance Monitor Config:
 ticks per usec : 1497 ticks
 max packet time : 550 usecs
 packet action : fastpath-expensive-packets
 packet logging : none

Rule Performance Monitor Config:
 ticks per usec : 1497 ticks
 max rule time : 230 usecs
 rule action : suspend-expensive-rules
 rule threshold : 3 
 suspend timeout : 20 secs
 rule logging : none 
pfring DAQ configured to inline.
enp0s16f0u1 <-> enp4s0u3
Acquiring network traffic from "enp0s16f0u1:enp4s0u3".
Reload thread starting...
Reload thread started, thread 0x7f170f121700 (3072)

--== Initialization Complete ==--

,,_ -*> Snort! <*-
 o" )~ Version 2.9.8.3 GRE (Build 383) 
 '''' By Martin Roesch & The Snort Team: http://www.snort.org/contact#team
 Copyright (C) 2014-2015 Cisco and/or its affiliates. All rights reserved.
 Copyright (C) 1998-2013 Sourcefire, Inc., et al.
 Using libpcap version 1.6.2
 Using PCRE version: 8.32 2012-11-30
 Using ZLIB version: 1.2.7

Rules Engine: SF_SNORT_DETECTION_ENGINE Version 2.6 <Build 1>
 Preprocessor Object: SF_MODBUS Version 1.1 <Build 1>
 Preprocessor Object: SF_GTP Version 1.1 <Build 1>
 Preprocessor Object: SF_SIP Version 1.1 <Build 1>
 Preprocessor Object: SF_DCERPC2 Version 1.0 <Build 3>
 Preprocessor Object: SF_FTPTELNET Version 1.2 <Build 13>
 Preprocessor Object: appid Version 1.1 <Build 5>
 Preprocessor Object: SF_DNP3 Version 1.1 <Build 1>
 Preprocessor Object: SF_REPUTATION Version 1.1 <Build 1>
 Preprocessor Object: SF_SDF Version 1.1 <Build 1>
 Preprocessor Object: SF_SSLPP Version 1.1 <Build 4>
 Preprocessor Object: SF_DNS Version 1.1 <Build 4>
 Preprocessor Object: SF_SSH Version 1.1 <Build 3>
 Preprocessor Object: SF_SMTP Version 1.1 <Build 9>
 Preprocessor Object: SF_IMAP Version 1.0 <Build 1>
 Preprocessor Object: SF_POP Version 1.0 <Build 1>
Commencing packet processing (pid=3046)
Decoding Ethernet


###TESTING WAS DONE HERE


^C*** Caught Int-Signal
===============================================================================
Run time for packet processing was 90.348326 seconds
Snort processed 6787 packets.
Snort ran for 0 days 0 hours 1 minutes 30 seconds
 Pkts/min: 6787
 Pkts/sec: 75
===============================================================================
Memory usage summary:
 Total non-mmapped bytes (arena): 673333248
 Bytes in mapped regions (hblkhd): 23707648
 Total allocated space (uordblks): 414819840
 Total free space (fordblks): 258513408
 Topmost releasable block (keepcost): 107488
===============================================================================
Packet Performance Summary:
 max packet time : 550 usecs
 packet events : 1947
 avg pkt time : 338.118 usecs
Rule Performance Summary:
 max rule time : 230 usecs
 rule events : 14
 avg rule time : 3.87642 usecs
===============================================================================
Packet I/O Totals:
 Received: 6787
 Analyzed: 6787 (100.000%)
 Dropped: 0 ( 0.000%)
 Filtered: 0 ( 0.000%)
Outstanding: 0 ( 0.000%)
 Injected: 6732
===============================================================================
Breakdown by protocol (includes rebuilt packets):
 Eth: 6811 (100.000%)
 VLAN: 0 ( 0.000%)
 IP4: 6706 ( 98.458%)
 Frag: 0 ( 0.000%)
 ICMP: 519 ( 7.620%)
 UDP: 759 ( 11.144%)
 TCP: 5396 ( 79.225%)
 IP6: 8 ( 0.117%)
 IP6 Ext: 8 ( 0.117%)
 IP6 Opts: 0 ( 0.000%)
 Frag6: 0 ( 0.000%)
 ICMP6: 8 ( 0.117%)
 UDP6: 0 ( 0.000%)
 TCP6: 0 ( 0.000%)
 Teredo: 8 ( 0.117%)
 ICMP-IP: 0 ( 0.000%)
 IP4/IP4: 0 ( 0.000%)
 IP4/IP6: 0 ( 0.000%)
 IP6/IP4: 0 ( 0.000%)
 IP6/IP6: 0 ( 0.000%)
 GRE: 0 ( 0.000%)
 GRE Eth: 0 ( 0.000%)
 GRE VLAN: 0 ( 0.000%)
 GRE IP4: 0 ( 0.000%)
 GRE IP6: 0 ( 0.000%)
GRE IP6 Ext: 0 ( 0.000%)
 GRE PPTP: 0 ( 0.000%)
 GRE ARP: 0 ( 0.000%)
 GRE IPX: 0 ( 0.000%)
 GRE Loop: 0 ( 0.000%)
 MPLS: 0 ( 0.000%)
 ARP: 105 ( 1.542%)
 IPX: 0 ( 0.000%)
 Eth Loop: 0 ( 0.000%)
 Eth Disc: 0 ( 0.000%)
 IP4 Disc: 0 ( 0.000%)
 IP6 Disc: 0 ( 0.000%)
 TCP Disc: 0 ( 0.000%)
 UDP Disc: 0 ( 0.000%)
 ICMP Disc: 0 ( 0.000%)
All Discard: 0 ( 0.000%)
 Other: 32 ( 0.470%)
Bad Chk Sum: 0 ( 0.000%)
 Bad TTL: 0 ( 0.000%)
 S5 G 1: 13 ( 0.191%)
 S5 G 2: 11 ( 0.162%)
 Total: 6811
===============================================================================
Action Stats:
 Alerts: 13 ( 0.191%)
 Logged: 13 ( 0.191%)
 Passed: 0 ( 0.000%)
Limits:
 Match: 0
 Queue: 0
 Log: 0
 Event: 3
 Alert: 0
Verdicts:
 Allow: 6241 ( 91.955%)
 Block: 1 ( 0.015%)
 Replace: 28 ( 0.413%)
 Whitelist: 486 ( 7.161%)
 Blacklist: 31 ( 0.457%)
 Ignore: 0 ( 0.000%)
 Retry: 0 ( 0.000%)
===============================================================================
Normalizer statistics:
 ip4::trim: 0
Would ip4::trim: 0
 ip4::tos: 0
Would ip4::tos: 0
 ip4::df: 0
Would ip4::df: 0
 ip4::rf: 0
Would ip4::rf: 0
 ip4::ttl: 0
Would ip4::ttl: 0
 ip4::opts: 27
Would ip4::opts: 0
 icmp4::echo: 0
Would icmp4::echo: 0
 ip6::ttl: 0
Would ip6::ttl: 0
 ip6::opts: 0
Would ip6::opts: 0
 icmp6::echo: 0
Would icmp6::echo: 0
 tcp::syn_opt: 0
Would tcp::syn_opt: 0
 tcp::opt: 0
Would tcp::opt: 0
 tcp::pad: 0
Would tcp::pad: 0
 tcp::rsv: 0
Would tcp::rsv: 0
 tcp::ns: 0
Would tcp::ns: 0
 tcp::urp: 0
Would tcp::urp: 0
 tcp::ecn_pkt: 0
Would tcp::ecn_pkt: 0
 tcp::ts_ecr: 0
Would tcp::ts_ecr: 0
 tcp::req_urg: 0
Would tcp::req_urg: 0
 tcp::req_pay: 0
Would tcp::req_pay: 0
 tcp::req_urp: 0
Would tcp::req_urp: 0
 tcp::ecn_ssn: 0
Would tcp::ecn_ssn: 0
 tcp::ts_nop: 0
Would tcp::ts_nop: 0
 tcp::ips_data: 1
Would tcp::ips_data: 0
 tcp::block: 1
Would tcp::block: 0
 tcp::trim_syn: 0
Would tcp::trim_syn: 0
 tcp::trim_rst: 0
Would tcp::trim_rst: 0
 tcp::trim_win: 0
Would tcp::trim_win: 0
 tcp::trim_mss: 0
Would tcp::trim_mss: 0
===============================================================================
Frag3 statistics:
 Total Fragments: 0
 Frags Reassembled: 0
 Discards: 0
 Memory Faults: 0
 Timeouts: 0
 Overlaps: 0
 Anomalies: 0
 Alerts: 0
 Drops: 0
 FragTrackers Added: 0
 FragTrackers Dumped: 0
FragTrackers Auto Freed: 0
 Frag Nodes Inserted: 0
 Frag Nodes Deleted: 0
===============================================================================
===============================================================================
Stream statistics:
 Total sessions: 190
 TCP sessions: 54
 UDP sessions: 136
 ICMP sessions: 0
 IP sessions: 0
 TCP Prunes: 0
 UDP Prunes: 0
 ICMP Prunes: 0
 IP Prunes: 0
TCP StreamTrackers Created: 54
TCP StreamTrackers Deleted: 54
 TCP Timeouts: 0
 TCP Overlaps: 1
 TCP Segments Queued: 2706
 TCP Segments Released: 2706
 TCP Rebuilt Packets: 536
 TCP Segments Used: 2671
 TCP Discards: 3
 TCP Gaps: 0
 UDP Sessions Created: 136
 UDP Sessions Deleted: 136
 UDP Timeouts: 0
 UDP Discards: 0
 Events: 8
 Internal Events: 0
 TCP Port Filter
 Filtered: 0
 Inspected: 0
 Tracked: 4852
 UDP Port Filter
 Filtered: 0
 Inspected: 0
 Tracked: 136
===============================================================================
HTTP Inspect - encodings (Note: stream-reassembled packets included):
 POST methods: 122 
 GET methods: 4 
 HTTP Request Headers extracted: 126 
 HTTP Request Cookies extracted: 0 
 Post parameters extracted: 122 
 HTTP response Headers extracted: 124 
 HTTP Response Cookies extracted: 1 
 Unicode: 0 
 Double unicode: 0 
 Non-ASCII representable: 0 
 Directory traversals: 0 
 Extra slashes ("//"): 0 
 Self-referencing paths ("./"): 0 
 HTTP Response Gzip packets extracted: 0 
 Gzip Compressed Data Processed: n/a 
 Gzip Decompressed Data Processed: n/a 
 Total packets processed: 2776 
===============================================================================
SMTP Preprocessor Statistics
 Total sessions : 3
 Max concurrent sessions : 2
 Base64 attachments decoded : 0
 Total Base64 decoded bytes : 0
 Quoted-Printable attachments decoded : 0
 Total Quoted decoded bytes : 0
 UU attachments decoded : 0
 Total UU decoded bytes : 0
 Non-Encoded MIME attachments extracted : 0
 Total Non-Encoded MIME bytes extracted : 0
===============================================================================
dcerpc2 Preprocessor Statistics
 Total sessions: 0
===============================================================================
SSL Preprocessor:
 SSL packets decoded: 105 
 Client Hello: 10 
 Server Hello: 10 
 Certificate: 6 
 Server Done: 24 
 Client Key Exchange: 7 
 Server Key Exchange: 4 
 Change Cipher: 20 
 Finished: 0 
 Client Application: 25 
 Server Application: 13 
 Alert: 2 
 Unrecognized records: 35 
 Completed handshakes: 0 
 Bad handshakes: 0 
 Sessions ignored: 13 
 Detection disabled: 0 
===============================================================================
SIP Preprocessor Statistics
 Total sessions: 11
 Total dialogs: 15
 Requests: 33
 invite: 0
 cancel: 0
 ack: 0
 bye: 0
 register: 20
 options: 13
 refer: 0
 subscribe: 0
 update: 0
 join: 0
 info: 0
 message: 0
 notify: 0
 prack: 0
 Responses: 13
 1xx: 0
 2xx: 13
 3xx: 0
 4xx: 0
 5xx: 0
 6xx: 0
 7xx: 0
 8xx: 0
 9xx: 0
 Ignore sessions: 0
 Ignore channels: 0
===============================================================================
Reputation Preprocessor Statistics
 Total Memory Allocated: 2257540
 Number of packets blacklisted: 12
 Number of packets whitelisted: 333
===============================================================================
+-----------------------[filtered events]--------------------------------------
| gen-id=1 sig-id=2002087 type=Threshold tracking=src count=10 seconds=60 filtered=3
Snort exiting
[root at ...17623... scripts]# ^C
[root at ...17623... scripts]# 







-----Oorspronkelijk bericht-----
Afzender: Hui cao <huica at ...589...>
Verstuurd: Dinsdag 2 Augustus 2016 15:08
Aan: Anton van der Leun <anton at ...17625...>; anton van der leun <anton at ...17621...>; snort-users at lists.sourceforge.net
Cc: Alexander van der Leun <alex at ...17625...>
Onderwerp: Re: [Snort-users] snort black list issue

 
 

Hi Anton, 
 

 

Thanks a lot for the conf file.
 

 

Can you show me the snort exit statistics for tcp traffic?

 

ICMP is not tracked by session, so they will be called for each packet. However, tcp and udp will be tracked and called only for the first packet in the session.

 

Best,

 

Hui.
 

 
On 08/01/2016 03:46 PM, Anton van der Leun wrote:
 
 
 

Hi Hui,

 

Thanks for response,

 

I am using stream5 preprocessor, see my preprocessor config below

 

 
 

Thanks again,

 

Anton

 

 
 

 
 
 
 

###################################################

 

# 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 1741 2100 3306 6070 6665 6666 6667 6668 6669 \

 

        7000 8181 32770 32771 32772 32773 32774 32775 32776 32777 32778 32779, \

 

    ports both 80 81 311 383 443 465 563 591 593 636 901 989 992 993 994 995 1220 1414 1830 2301 2381 2809 3037 3128 3702 4343 4848 5250 6988 7907 7000 7001 7144 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 8085 8088 8090 8118 8123 8180 8243 8280 8300 8800 8888 8899 9000 9060 9080 9090 9091 9443 9999 11371 34443 34444 41080 50002 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 /var/snort/snort.stats pktcnt 10000

 

 
 

# HTTP normalization and anomaly detection.  For more information, see README.http_inspect

 

preprocessor http_inspect: global iis_unicode_map unicode.map 1252 compress_depth 65535 decompress_depth 65535

 

preprocessor http_inspect_server: server default \

 

    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 200 \

 

    small_chunk_length { 10 5 } \

 

    ports { 80 81 311 383 591 593 901 1220 1414 1741 1830 2301 2381 2809 3037 3128 3702 4343 4848 5250 6988 7000 7001 7144 7145 7510 7777 7779 8000 8008 8014 8028 8080 8085 8088 8090 8118 8123 8180 8181 8243 8280 8300 8800 8888 8899 9000 9060 9080 9090 9091 9443 9999 11371 34443 34444 41080 50002 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, \

 

   scan_local, \

 

   priority whitelist, \

 

   nested_ip inner, \

 

   whitelist /etc/snort/rules/white_list.rules, \

 

   blacklist /etc/snort/rules/black_list.rules, \

 

   blacklist /etc/snort/rules/black_list_local.rules, \

 

   white trust

 

 
 

##preprocessor appid : app_stats_filename appstats-unified.log, app_stats_period 60, app_detector_dir /usr/local/lib/openappid

 

##preprocessor appid: app_stats_filename appstats-u2.log, \

 

##   app_stats_period 60, \

 

##   app_detector_dir /usr/local/lib/openappid

 

 
 

 
 

Van: Hui Cao (huica) [mailto:huica at ...589...] 
 Verzonden: maandag 1 augustus 2016 21:16
 Aan: anton van der leun <anton at ...17621...>; snort-users at lists.sourceforge.net
 CC: Anton van der Leun <anton at ...17625...>; Alexander van der Leun <alex at ...17625...>
 Onderwerp: Re: [Snort-users] snort black list issue

 
 
 

 
 
 

Have you enabled session preprocessor?

 
 
 

 
 
 
 

Reputation preprocessor has been moved after session preprocessor. It is called once per session.

 
 
 

 
 
 
 

Best,

 
 
 

Hui.

 
 
 

 
 
 
 

From: anton van der leun <anton at ...17621...>
 Date: Monday, August 1, 2016 at 6:08 AM
 To: "snort-users at lists.sourceforge.net" <snort-users at lists.sourceforge.net>
 Cc: "anton at ...17625..." <anton at ...17625...>, "alex at ...17625..." <alex at ...17625...>
 Subject: [Snort-users] snort black list issue

 
 
 

 
 
 
 
 

Hello snort community

 

 
 

I ran into this issue while debugging a certain attack this weekend and noticed the following I don’t understand:

 

 
 

Conditions : snort blacklist has certain ip address

 

Results:  after adding this address and a warm reload of snort : ICMP messages are blocked, however tcp sessions are NOT.

 

 
 

Example (ip address is not yet added to black list)

 

 
 

root at ...17622...:~# ping 5.157.87.137

 

PING 5.157.87.137 (5.157.87.137) 56(84) bytes of data.

 

64 bytes from 5.157.87.137: icmp_req=1 ttl=54 time=21.7 ms

 

64 bytes from 5.157.87.137: icmp_req=2 ttl=54 time=11.1 ms

 

^C

 

 
 

root at ...17622...:~# telnet 5.157.87.137 80

 

Trying 5.157.87.137...

 

Connected to 5.157.87.137.

 

Escape character is '^]'.

 

^]

 

telnet> quit

 

Connection closed.

 

 
 

root at ...17622...:~# ##snort blacklist added 5.157.87.137   and snort is reloaded

 

root at ...17622...:~# ping 5.157.87.137      

 

PING 5.157.87.137 (5.157.87.137) 56(84) bytes of data.

 

^C

 

--- 5.157.87.137 ping statistics ---

 

5 packets transmitted, 0 received, 100% packet loss, time 4030ms

 

 
 

 
 

root at ...17622...:~# telnet 5.157.87.137 80 

 

Trying 5.157.87.137...

 

Connected to 5.157.87.137.

 

Escape character is '^]'.

 

^]

 

telnet> quit

 

Connection closed.

 

root at ...17622...:~# 

 

 
 

The screenshot of my monitoring tool is included to show that the icmp message was indeed blocked

 

However a tcp sessiob to port 80 is still not blocked !

 

 
 

Here some config and version info:

 

 
 

[root at ...17623... scripts]# /usr/local/bin/snort -V

 

 
 

   ,,_     -*> Snort! <*-

 

  o"  )~   Version 2.9.8.3 GRE (Build 383) 

 

   ''''    By Martin Roesch & The Snort Team: http://www.snort.org/contact#team

 

           Copyright (C) 2014-2015 Cisco and/or its affiliates. All rights reserved.

 

           Copyright (C) 1998-2013 Sourcefire, Inc., et al.

 

           Using libpcap version 1.6.2

 

           Using PCRE version: 8.32 2012-11-30

 

           Using ZLIB version: 1.2.7

 

 
 

 
 

# Reputation preprocessor. For more information see README.reputation

 

preprocessor reputation: \

 

   memcap 500, \

 

   scan_local, \

 

   priority whitelist, \

 

   nested_ip inner, \

 

   whitelist /etc/snort/rules/white_list.rules, \

 

   blacklist /etc/snort/rules/black_list.rules, \

 

   blacklist /etc/snort/rules/black_list_local.rules, \

 

   white trust

 

 
 

 
 

In my opninion the reputation processor has absolute priority and all messages should be blocked.

 

I hope somebody can direct me in the right direction.

 

 
 

Thanks in advance,

 

Anton van der Leun

 

 
 
 
 
 
 
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