[Snort-users] Is this possible answer to the problem?

Peter Rodger prodger2008 at ...131...
Wed Oct 26 11:49:42 EDT 2005


Hi All,

The below is the part of output from snort -c -l
Ypu can tell 60% packets are dropped.  could this be
the reason I can not suppress 
suppress gen_id 122, sig_id 27
suppress gen_id 122, sig_id 19
suppress gen_id 119, sig_id 4

Even I changed only span one VLAN, still 60-70%
packets are dropped.


Snort received 14747 packets
    Analyzed: 6016(40.795%)
    Dropped: 8731(59.205%)
===============================================================================
Breakdown by protocol:
    TCP: 5955       (40.381%)
    UDP: 52         (0.353%)
   ICMP: 0          (0.000%)
    ARP: 0          (0.000%)
  EAPOL: 0          (0.000%)
   IPv6: 0          (0.000%)
    IPX: 0          (0.000%)
  OTHER: 6          (0.041%)
DISCARD: 0          (0.000%)

****************************************************
The whole output:
D:\win-ids\Snort\bin>snort -c
"d:\win-ids\snort\etc\snort.conf" -l "d:\win-ids\s
nort\log"
Running in IDS mode

Initializing Network Interface
\Device\NPF_{068F010E-6C94-4163-9C52-15551BFD66A9
}

        --== Initializing Snort ==--
Initializing Output Plugins!
Decoding Ethernet on interface
\Device\NPF_{068F010E-6C94-4163-9C52-15551BFD66A9
}
Initializing Preprocessors!
Initializing Plug-ins!
Parsing Rules file d:\win-ids\snort\etc\snort.conf

+++++++++++++++++++++++++++++++++++++++++++++++++++
Initializing rule chains...
,-----------[Flow Config]----------------------
| Stats Interval:  0
| Hash Method:     2
| Memcap:          10485760
| Rows  :          4099
| Overhead Bytes:  16400(%0.16)
`----------------------------------------------
No arguments to frag2 directive, setting defaults to:
    Fragment timeout: 60 seconds
    Fragment memory cap: 4194304 bytes
    Fragment min_ttl:   0
    Fragment ttl_limit: 5
    Fragment Problems: 0
    Self preservation threshold: 500
    Self preservation period: 90
    Suspend threshold: 1000
    Suspend period: 30
Stream4 config:
    Stateful inspection: ACTIVE
    Session statistics: INACTIVE
    Session timeout: 30 seconds
    Session memory cap: 8388608 bytes
    State alerts: INACTIVE
    Evasion alerts: INACTIVE
    Scan alerts: INACTIVE
    Log Flushed Streams: INACTIVE
    MinTTL: 1
    TTL Limit: 5
    Async Link: 0
    State Protection: 0
    Self preservation threshold: 50
    Self preservation period: 90
    Suspend threshold: 200
    Suspend period: 30
    Enforce TCP State: INACTIVE
    Midstream Drop Alerts: INACTIVE

Stream4_reassemble config:
    Server reassembly: INACTIVE
    Client reassembly: ACTIVE
    Reassembler alerts: ACTIVE
    Zero out flushed packets: INACTIVE
    flush_data_diff_size: 500
    Ports: 21 23 25 53 80 110 111 143 513 1433
    Emergency Ports: 21 23 25 53 80 110 111 143 513
1433
HttpInspect Config:
    GLOBAL CONFIG
      Max Pipeline Requests:    0
      Inspection Type:          STATELESS
      Detect Proxy Usage:       NO
      IIS Unicode Map Filename:
d:\win-ids\snort\etc\unicode.map
      IIS Unicode Map Codepage: 1252
    DEFAULT SERVER CONFIG:
      Ports: 80 8080 8180
      Flow Depth: 300
      Max Chunk Length: 500000
      Inspect Pipeline Requests: YES
      URI Discovery Strict Mode: NO
      Allow Proxy Usage: NO
      Disable Alerting: NO
      Oversize Dir Length: 500
      Only inspect URI: NO
      Ascii: YES alert: NO
      Double Decoding: YES alert: YES
      %U Encoding: YES alert: YES
      Bare Byte: YES alert: YES
      Base36: OFF
      UTF 8: OFF
      IIS Unicode: YES alert: YES
      Multiple Slash: YES alert: NO
      IIS Backslash: YES alert: NO
      Directory Traversal: YES alert: NO
      Web Root Traversal: YES alert: YES
      Apache WhiteSpace: YES alert: NO
      IIS Delimiter: YES alert: NO
      IIS Unicode Map: GLOBAL IIS UNICODE MAP CONFIG
      Non-RFC Compliant Characters: NONE
rpc_decode arguments:
    Ports to decode RPC on: 111 32771
    alert_fragments: INACTIVE
    alert_large_fragments: ACTIVE
    alert_incomplete: ACTIVE
    alert_multiple_requests: ACTIVE
telnet_decode arguments:
    Ports to decode telnet on: 21 23 25 119
Portscan Detection Config:
    Detect Protocols:  TCP UDP ICMP IP
    Detect Scan Type:  portscan portsweep
decoy_portscan distributed_portscan
    Sensitivity Level: Low
    Memcap (in bytes): 10000000
    Number of Nodes:   36900

Using LOCAL time
alert_syslog output processor is defaulting to syslog
server on 127.0.0.1 port 5
14!
database: compiled support for ( mysql odbc mssql )
database: configured to use mssql
database: database name = snort
database:          user = snort
database: password is set
database:          host = localhost
database:          port = 1433
database:   sensor name =
TESTIDS:\Device\NPF_{068F010E-6C94-4163-9C52-15551BFD6
6A9}
database: SQL Server message 5701, state 2, severity
0:
        Changed database context to 'snort'.
Server 'TESTIDS',
database: SQL Server message 5701, state 1, severity
0:
        Changed database context to 'snort'.
Server 'TESTIDS', Line 1
database:     sensor id = 1
database: inconsistent cid information for sid=1
          Recovering by rolling forward the cid=45184
database: schema version = 106
database: using the "log" facility
database: compiled support for ( mysql odbc mssql )
database: configured to use mssql
database: database name = snort
database:          user = snort
database: password is set
database:          host = localhost
database:          port = 1433
database:   sensor name =
TESTIDS:\Device\NPF_{068F010E-6C94-4163-9C52-15551BFD6
6A9}
database: SQL Server message 5701, state 2, severity
0:
        Changed database context to 'snort'.
Server 'TESTIDS',
database: SQL Server message 5701, state 1, severity
0:
        Changed database context to 'snort'.
Server 'TESTIDS', Line 1
database:     sensor id = 1
database: schema version = 106
database: using the "alert" facility
2111 Snort rules read...
2111 Option Chains linked into 191 Chain Headers
0 Dynamic rules
+++++++++++++++++++++++++++++++++++++++++++++++++++

Warning: flowbits key 'http.jpeg' is checked but not
ever set.
Warning: flowbits key 'ms_sql_seen_dns' is checked but
not ever set.
Warning: flowbits key 'realplayer.playlist' is checked
but not ever set.

+-----------------------[thresholding-config]----------------------------------
| memory-cap : 1048576 bytes
+-----------------------[thresholding-global]----------------------------------
| none
+-----------------------[thresholding-local]-----------------------------------
| gen-id=1      sig-id=3273       type=Threshold
tracking=src count=5   seconds=
2
| gen-id=1      sig-id=3542       type=Threshold
tracking=src count=5   seconds=
2
| gen-id=1      sig-id=3543       type=Threshold
tracking=src count=5   seconds=
2
| gen-id=1      sig-id=3527       type=Limit    
tracking=dst count=5   seconds=
60
| gen-id=1      sig-id=2275       type=Threshold
tracking=dst count=5   seconds=
60
| gen-id=1      sig-id=3152       type=Threshold
tracking=src count=5   seconds=
2
| gen-id=1      sig-id=2523       type=Both     
tracking=dst count=10  seconds=
10
+-----------------------[suppression]------------------------------------------
| gen-id=1      sig-id=466       
tracking=dstip=0.0.0.0           mask=0.0.0.0

| gen-id=1      sig-id=1070      
tracking=dstip=0.0.0.0           mask=0.0.0.0

| gen-id=1      sig-id=882       
tracking=dstip=0.0.0.0           mask=0.0.0.0

| gen-id=119    sig-id=4         
tracking=dstip=0.0.0.0           mask=0.0.0.0

| gen-id=122    sig-id=27        
tracking=dstip=0.0.0.0           mask=0.0.0.0

| gen-id=122    sig-id=19        
tracking=dstip=0.0.0.0           mask=0.0.0.0

+------------------------------------------------------------------------------
Rule application order:
->activation->dynamic->alert->pass->log
Log directory = d:\win-ids\snort\log

        --== Initialization Complete ==--

   ,,_     -*> Snort! <*-
  o"  )~   Version
2.3.0-ODBC-MySQL-MSSQL-FlexRESP-WIN32 (Build 10)
   ''''    By Martin Roesch & The Snort Team:
http://www.snort.org/team.html
           (C) Copyright 1998-2004 Sourcefire Inc., et
al.



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

Snort received 14747 packets
    Analyzed: 6016(40.795%)
    Dropped: 8731(59.205%)
===============================================================================
Breakdown by protocol:
    TCP: 5955       (40.381%)
    UDP: 52         (0.353%)
   ICMP: 0          (0.000%)
    ARP: 0          (0.000%)
  EAPOL: 0          (0.000%)
   IPv6: 0          (0.000%)
    IPX: 0          (0.000%)
  OTHER: 6          (0.041%)
DISCARD: 0          (0.000%)
===============================================================================
Action Stats:
ALERTS: 0
LOGGED: 0
PASSED: 0
===============================================================================
TCP Stream Reassembly Stats:
    TCP Packets Used: 5955       (40.381%)
    Stream Trackers: 403
    Stream flushes: 223
    Segments used: 453
    Stream4 Memory Faults: 0
===============================================================================
Final Flow Statistics
,----[ FLOWCACHE STATS ]----------
Memcap: 10485760 Overhead Bytes 16400
used(%0.760622)/blocks (79757/432) Overhea
d blocks: 1 Could Hold: (71331)
IPV4 count: 431 frees: 0 low_time: 1130348993,
high_time: 1130349005, diff: 0h:0
0:12s
    finds: 6516 reversed: 0(%0.000000)
    find_sucess: 2341271307 find_fail: 1078269480
percent_success: (%0.000000) n
ew_flows: 439
 Protocol: 6 (%99.125230) finds: 6459  reversed:
0(%0.000000)
  find_sucess: 3354050943 find_fail: 1078272036
percent_success: (%0.000000) new
_flows: 420
 Protocol: 17 (%0.828729) finds: 54  reversed:
0(%0.000000)
  find_sucess: 636291451 find_fail: 1078040500
percent_success: (%0.000000) new_
flows: 17
 Protocol: 88 (%0.046041) finds: 3  reversed:
0(%0.000000)
  find_sucess: 0 find_fail: 0 percent_success:
(%0.000000) new_flows: 2
database: Closing connection to database ""
database: Closing connection to database ""
Snort exiting


Thank you,

Peter



		
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