Snort mailing list archives
Re: snort black list issue
From: anton van der leun <anton () vanderleun com>
Date: Tue, 2 Aug 2016 16:21:14 +0200
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@xen2-zarafa-71-1:/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@xen2-zarafa-71-1:/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@xen2-zarafa-71-1:/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@xen2-zarafa-71-1:/usr/share/z-push# = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = below is log of starting snort and stopping after client test [root@snort73 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@snort73 scripts]# ^C [root@snort73 scripts]# -----Oorspronkelijk bericht----- Afzender: Hui cao <huica () cisco com> Verstuurd: Dinsdag 2 Augustus 2016 15:08 Aan: Anton van der Leun <anton () triple-t-services nl>; anton van der leun <anton () vanderleun com>; snort-users () lists sourceforge net Cc: Alexander van der Leun <alex () triple-t-services nl> 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 () cisco com] Verzonden: maandag 1 augustus 2016 21:16 Aan: anton van der leun <anton () vanderleun com>; snort-users () lists sourceforge net CC: Anton van der Leun <anton () triple-t-services nl>; Alexander van der Leun <alex () triple-t-services nl> 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 () vanderleun com> Date: Monday, August 1, 2016 at 6:08 AM To: "snort-users () lists sourceforge net" <snort-users () lists sourceforge net> Cc: "anton () triple-t-services nl" <anton () triple-t-services nl>, "alex () triple-t-services nl" <alex () triple-t-services nl> 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@xen2-zarafa-71-1:~# 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@xen2-zarafa-71-1:~# 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@xen2-zarafa-71-1:~# ##snort blacklist added 5.157.87.137 and snort is reloaded root@xen2-zarafa-71-1:~# 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@xen2-zarafa-71-1:~# 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@xen2-zarafa-71-1:~# 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@snort73 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
------------------------------------------------------------------------------
_______________________________________________ Snort-users mailing list Snort-users () 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://sourceforge.net/mailarchive/forum.php?forum_name=snort-users Please visit http://blog.snort.org to stay current on all the latest Snort news!
Current thread:
- snort black list issue anton van der leun (Aug 01)
- Re: snort black list issue Hui Cao (huica) (Aug 01)
- Message not available
- Re: snort black list issue Hui cao (Aug 02)
- <Possible follow-ups>
- Re: snort black list issue anton van der leun (Aug 01)
- Re: snort black list issue anton van der leun (Aug 02)
- Re: snort black list issue Hui cao (Aug 02)
- Re: snort black list issue anton van der leun (Aug 02)
- Re: snort black list issue anton van der leun (Aug 03)
- FW: snort black list issue anton van der leun (Aug 04)
- Re: snort black list issue anton van der leun (Aug 08)
- Re: snort black list issue Hui cao (Aug 02)
- Re: snort black list issue anton van der leun (Aug 02)
- Re: snort black list issue anton van der leun (Aug 02)
- Re: snort black list issue Hui cao (Aug 02)