Stream5 configuration with Windows, and Linux

[Rafael Leiva-Ochoa <spawn () rloteck net>]

Hi All,

    I am trying to configure the Stream5 preprocessor to do reassembly for
both Windows and Linux using the following configuration:

# Target-Based stateful inspection/stream reassembly.  For more inforation,
see README.stream5

preprocessor stream5_global: track_tcp yes

preprocessor stream5_tcp: bind_to 192.168.1.28/32, policy windows

preprocessor stream5_tcp: bind_to 192.168.1.30/32, policy windows

preprocessor stream5_tcp: policy linux

   track_udp yes, \

   track_icmp no, \

   max_tcp 262144, \

   max_udp 131072, \

   max_active_responses 2, \

   min_response_seconds 5

detect_anomalies, require_3whs 180, \

   overlap_limit 10, small_segments 0 bytes 150, timeout 180, \

    ports client 21 22 23 25 42 53 70 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 36 80 81 82 83 84 85 86 87 88 89 90 110 311 383 443 465 563
555 591 593 631 636 801 808 818 901 972 989 992 993 994 995 1158 1220 1414
1533 1741 1830 1942 2231 2301 2381 2578 2809 2980 3029 3037 3057 3128 3443
3702 4000 4343 4848 5000 5117 5250 5600 5814 6080 6173 6988 7907 7000 7001
7005 7071 7144 7145 7510 7802 7770 7777 7778 7779 \

        7801 7900 7901 7902 7903 7904 7905 7906 7908 7909 7910 7911 7912
7913 7914 7915 7916 \

        7917 7918 7919 7920 8000 8001 8008 8014 8015 8020 8028 8040 8080
8081 8082 8085 8088 8090 8118 8123 8180 8181 8182 8222 8243 8280 8300 8333
8344 8400 8443 8500 8509 8787 8800 8888 8899 8983 9000 9002 9060 9080 9090
9091 9111 9290 9443 9447 9710 9788 9999 10000 11371 12601 13014 15489 19980
29991 33300 34412 34443 34444 40007 41080 44449 50000 50002 51423 53331
55252 55555 56712


But, I only get this error when trying to run it.

Nov 19 11:24:25 snort-sensor1 snort[24078]: Frag3 global config:

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Max frags: 65536

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Fragment memory cap:
4194304 bytes

Nov 19 11:24:25 snort-sensor1 snort[24078]: Frag3 engine config:

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Bound Address: default

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Target-based policy: LINUX

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Fragment timeout: 180
seconds

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Fragment min_ttl:   1

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Fragment Anomalies: Alert

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Overlap Limit:     10

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Min fragment Length:     100

Nov 19 11:24:25 snort-sensor1 snort[24078]:       Max Expected Streams: 768

Nov 19 11:24:25 snort-sensor1 snort[24078]: Stream global config:

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Track TCP sessions: ACTIVE

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Max TCP sessions: 262144

Nov 19 11:24:25 snort-sensor1 snort[24078]:     TCP cache pruning timeout:
30 seconds

Nov 19 11:24:25 snort-sensor1 snort[24078]:     TCP cache nominal timeout:
3600 seconds

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Memcap (for reassembly
packet storage): 8388608

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Track UDP sessions: ACTIVE

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Max UDP sessions: 131072

Nov 19 11:24:25 snort-sensor1 snort[24078]:     UDP cache pruning timeout:
30 seconds

Nov 19 11:24:25 snort-sensor1 snort[24078]:     UDP cache nominal timeout:
180 seconds

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Track ICMP sessions:
INACTIVE

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Track IP sessions: INACTIVE

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Log info if session memory
consumption exceeds 1048576

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Send up to 0 active
responses

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Protocol Aware Flushing:
ACTIVE

Nov 19 11:24:25 snort-sensor1 snort[24078]:         Maximum Flush Point:
16000

Nov 19 11:24:25 snort-sensor1 snort[24078]: Stream TCP Policy config:

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Bound Addresses:
192.168.1.28

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Reassembly Policy: WINDOWS

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Timeout: 30 seconds

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Maximum number of bytes to
queue per session: 1048576

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Maximum number of segs to
queue per session: 2621

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Reassembly Ports:

Nov 19 11:24:25 snort-sensor1 snort[24078]: Stream TCP Policy config:

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Bound Addresses:
192.168.1.30

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Reassembly Policy: WINDOWS

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Timeout: 30 seconds

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Maximum number of bytes to
queue per session: 1048576

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Maximum number of segs to
queue per session: 2621

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Reassembly Ports:

Nov 19 11:24:25 snort-sensor1 snort[24078]: Stream TCP Policy config:

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Bound Address: default

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Reassembly Policy: LINUX

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Timeout: 30 seconds

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Maximum number of bytes to
queue per session: 1048576

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Maximum number of segs to
queue per session: 2621

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Reassembly Ports:

Nov 19 11:24:25 snort-sensor1 snort[24078]: Stream UDP Policy config:

Nov 19 11:24:25 snort-sensor1 snort[24078]:     Timeout: 180 seconds

Nov 19 11:24:25 snort-sensor1 snort[24078]: HttpInspect Config:

Nov 19 11:24:25 snort-sensor1 snort[24078]:     GLOBAL CONFIG

Nov 19 11:24:25 snort-sensor1 snort[24078]:       Detect Proxy Usage:
NO

Nov 19 11:24:25 snort-sensor1 snort[24078]:       IIS Unicode Map Filename:
/etc/snort/unicode.map

Nov 19 11:24:25 snort-sensor1 snort[24078]:       IIS Unicode Map Codepage:
1252

Nov 19 11:24:25 snort-sensor1 snort[24078]:       Memcap used for logging
URI and Hostname: 150994944

Nov 19 11:24:25 snort-sensor1 snort[24078]:       Max Gzip Memory: 838860

Nov 19 11:24:25 snort-sensor1 snort[24078]:       Max Gzip Sessions: 1807

Nov 19 11:24:25 snort-sensor1 rsyslogd-2177: imuxsock begins to drop
messages from pid 24078 due to rate-limiting
Any ideas on how to fix this?

Thanks,

Rafael

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