besoin d'aide sur snort.conf

salut

j'ai quelques questions conçernant la configuration de snort!

j'ai un exposé où je doit manipuler "snort" et "asterisk" ( pour implementer un système d'alerte vocale pour les intrusions réseaux )

j'ai suivi ce document http://www.howtoforge.com/intrusion-...on-ubuntu-7.10 " ( Pourriez vous lire ce tutoriel afin de mieux me comprendre? )

je me suis arrêté sur cette commande " vim /etc/snort/snort.conf "
et la je ne sais pas se que je dois mettre comme configuration

J'ai ADSL easy " algérie " mes @ip changent à chaque fois que je me reconnecte.
41.201.x.x\?? !! ( "x" change à chaque nouvelle connexion )

Autre chose l'encadreur demande de faire en sorte que snort soit configuré pour une détection de ping ou quelque chose comme ça :s

J'aimerais donc savoir ce que je dois modifier de début à la fin sur le fichier snort.conf ( des explications precises pour quelqu'un qui ne connait rien de rien :s )
et ce que je dois faire pour arriver au but demandé par l'encadreur

Malheureusement nous ne pouvons pas te fournir un fichier snort.conf tout fait.
Il faudrait que tu commences par en créer un et ensuite poser des questions sur les points qui te paraissent obscurs.

Enfin le lien que tu donnes dans ton premier post n'était pas bon :( je l'ai corrigé.

j'ai eux plusieurs problemes sur le lancement de snort!
et sa fait des mois que je bloque sur se logiciel ! alors qu'il me reste asterisk et ensuite le systeme :( ( faire tout sa avant le mois Mai, projet fin d'étude )

j'ai trouvé que le probleme c'est que je c'est pas exactement ( malgré tout les recherche que j'ai fait ) quelle sont les ligne a modifier et a ajouté et les regle a mettre pour que sa fonctionne parfaitement ! :cry:

SVP aidez moi! :oops:

salut !! j'ai relier deux pc avec un cable croisé !! j'ai terminé où je me ss arreté

mais je me suis bloqué sur un probleme, sur cette étape ( je suis toujour le meme doc )

12. Time to test Snort
In the terminal type:
# snort -c /etc/snort/snort.conf
If everything went well you should see an ascii pig.
To end the test hit ctrl + c.

pour moi il m'affiche a la fin fatal error ( alors que je suivez bien le doc ) SVP AIDEZ MOI

Citation:

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:~/snorttmp/snort-2.8.3.2/etc# snort -c /etc/snort/snort.conf
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 ]
PortVar 'SHELLCODE_PORTS' defined : [ 0:79 81:65535 ]
PortVar 'ORACLE_PORTS' defined : [ 1521 ]
Frag3 global config:
Max frags: 65536
Fragment memory cap: 4194304 bytes
Frag3 engine config:
Target-based policy: FIRST
Fragment timeout: 60 seconds
Fragment min_ttl: 1
Fragment ttl_limit (not used): 5
Fragment Problems: 1
Stream5 global config:
Track TCP sessions: ACTIVE
Max TCP sessions: 8192
Memcap (for reassembly packet storage): 8388608
Track UDP sessions: INACTIVE
Track ICMP sessions: INACTIVE
Log info if session memory consumption exceeds 1048576
Stream5 TCP Policy config:
Reassembly Policy: FIRST
Timeout: 30 seconds
Min ttl: 1
Maximum number of bytes to queue per session: 1048576
Maximum number of segs to queue per session: 2621
Options:
Static Flushpoint Sizes: YES
Reassembly Ports:
21 client (Footprint)
23 client (Footprint)
25 client (Footprint)
42 client (Footprint)
53 client (Footprint)
80 client (Footprint)
110 client (Footprint)
111 client (Footprint)
135 client (Footprint)
136 client (Footprint)
137 client (Footprint)
139 client (Footprint)
143 client (Footprint)
445 client (Footprint)
513 client (Footprint)
514 client (Footprint)
1433 client (Footprint)
1521 client (Footprint)
2401 client (Footprint)
3306 client (Footprint)
HttpInspect Config:
GLOBAL CONFIG
Max Pipeline Requests: 0
Inspection Type: STATELESS
Detect Proxy Usage: NO
IIS Unicode Map Filename: /etc/snort/unicode.map
IIS Unicode Map Codepage: 1252
DEFAULT SERVER CONFIG:
Server profile: All
Ports: 80 8080 8180
Server Flow Depth: 300
Client Flow Depth: 300
Max Chunk Length: 500000
Max Header Field Length: 0
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
Normalize HTTP Cookies: 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
Whitespace Characters: 0x09 0x0b 0x0c 0x0d
rpc_decode arguments:
Ports to decode RPC on: 111 32771
alert_fragments: INACTIVE
alert_large_fragments: ACTIVE
alert_incomplete: ACTIVE
alert_multiple_requests: ACTIVE
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

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_dns_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//lib_sfdynamic_preprocessor_example.so... done
Loading dynamic preprocessor library /usr/local/lib/snort_dynamicpreprocessor//libsf_dcerpc_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_smtp_preproc.so... done
Loading dynamic preprocessor library /usr/local/lib/snort_dynamicpreprocessor//libsf_ssl_preproc.so... done
Finished Loading all dynamic preprocessor libs from /usr/local/lib/snort_dynamicpreprocessor/
FTPTelnet Config:
GLOBAL CONFIG
Inspection Type: stateful
Check for Encrypted Traffic: YES alert: YES
Continue to check encrypted data: NO
TELNET CONFIG:
Ports: 23
Are You There Threshold: 200
Normalize: YES
Detect Anomalies: NO
FTP CONFIG:
FTP Server: default
Ports: 21
Check for Telnet Cmds: YES alert: YES
Identify open data channels: YES
FTP Client: default
Check for Bounce Attacks: YES alert: YES
Check for Telnet Cmds: YES alert: YES
Max Response Length: 256

SMTP Config:
Ports: 25 587 691
Inspection Type: Stateful
Normalize: EXPN RCPT VRFY
Ignore Data: No
Ignore TLS Data: No
Ignore SMTP Alerts: No
Max Command Line Length: Unlimited
Max Specific Command Line Length:
ETRN:500 EXPN:255 HELO:500 HELP:500 MAIL:260
RCPT:300 VRFY:255
Max Header Line Length: Unlimited
Max Response Line Length: Unlimited
X-Link2State Alert: Yes
Drop on X-Link2State Alert: No
Alert on commands: None

DCE/RPC Decoder config:
Autodetect ports ENABLED
SMB fragmentation ENABLED
DCE/RPC fragmentation ENABLED
Max Frag Size: 3000 bytes
Memcap: 100000 KB
Alert if memcap exceeded DISABLED
Reassembly increment: 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

+++++++++++++++++++++++++++++++++++++++++++++++++++
Initializing rule chains...
2830 Snort rules read
2830 detection rules
0 decoder rules
0 preprocessor rules
2830 Option Chains linked into 215 Chain Headers
0 Dynamic rules
+++++++++++++++++++++++++++++++++++++++++++++++++++

+-------------------[Rule Port Counts]---------------------------------------
| tcp udp icmp ip
| src 122 12 0 0
| dst 2382 163 0 0
| any 68 50 50 20
| nc 22 8 15 18
| s+d 3 3 0 0
+----------------------------------------------------------------------------

+-----------------------[thresholding-config]----------------------------------
| memory-cap : 1048576 bytes
+-----------------------[thresholding-global]----------------------------------
| none
+-----------------------[thresholding-local]-----------------------------------
| gen-id=1 sig-id=3152 type=Threshold tracking=src count=5 seconds=2
| gen-id=1 sig-id=2495 type=Both tracking=dst count=20 seconds=60
| gen-id=1 sig-id=2924 type=Threshold tracking=dst count=10 seconds=60
| gen-id=1 sig-id=2496 type=Both tracking=dst count=20 seconds=60
| gen-id=1 sig-id=2494 type=Both tracking=dst count=20 seconds=60
| 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=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=2923 type=Threshold tracking=dst count=10 seconds=60
| gen-id=1 sig-id=2523 type=Both tracking=dst count=10 seconds=10
| gen-id=1 sig-id=3543 type=Threshold tracking=src count=5 seconds=2
+-----------------------[suppression]------------------------------------------
| none
-------------------------------------------------------------------------------
Rule application order: activation->dynamic->pass->drop->alert->log
Log directory = /var/log/snort
Verifying Preprocessor Configurations!
Warning: flowbits key 'realplayer.playlist' is checked but not ever set.
Warning: flowbits key 'ms_sql_seen_dns' is checked but not ever set.
Warning: flowbits key 'smb.tree.create.llsrpc' is set but not ever checked.
Warning: flowbits key 'dce.bind.veritas' is set but not ever checked.
35 out of 512 flowbits in use.
***
*** interface device lookup found: eth0
***

Initializing Network Interface eth0
Decoding Ethernet on interface eth0
database: compiled support for ( mysql )
database: configured to use mysql
database: user = root
database: password is set
database: database name = snort
database: host = localhost
database: sensor name = 192.168.0.1
database: mysql_error: Table 'snort.sensor' doesn't exist
database: mysql_error: Table 'snort.sensor' doesn't exist
SQL=INSERT INTO sensor (hostname, interface, detail, encoding, last_cid) VALUES ('192.168.0.1','eth0',1,0, 0)
database: mysql_error: Table 'snort.sensor' doesn't exist
database: Problem obtaining SENSOR ID (sid) from snort->sensor
ERROR: When this plugin starts, a SELECT query is run to find the sensor id for the
currently running sensor. If the sensor id is not found, the plugin will run
an INSERT query to insert the proper data and generate a new sensor id. Then a
SELECT query is run to get the newly allocated sensor id. If that fails then
this error message is generated.

Some possible causes for this error are:
* the user does not have proper INSERT or SELECT privileges
* the sensor table does not exist

If you are _absolutely_ certain that you have the proper privileges set and
that your database structure is built properly please let me know if you
continue to get this error. You can contact me at (roman@danyliw.com).

Fatal Error, Quitting..

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salut

il faut faire quoi pour évité cette fatal erreur :cry: