[Snort-users] Sensor agent in SnortCenter

Shawn Truax Shawn.Truax at ...8509...
Tue May 6 05:46:06 EDT 2003

I had this problem as well.  In my case thought it was due to firewalling (iptables or chains depending) issues on the SnortCenter server.  If all your fire walling rules look ok on the SnortCenter server try double checking your database logins.  Failing that I ran tcpdump on both machines to find the problem.   In my case I noticed syn connections where being sent to the server but the server wasn't responding.  You might find something similar with your setup to guide you in the right direction for problem solving.  

Hope I was at least a little helpful.

Shawn Truax
Security Specialist
Corporate Security
155 University Ave.
Toronto, Ontario
M5H 3B7

>>> "David Powell" <dpowell at ...8963...> 05/05/03 02:55pm >>>
Anybody using SnortCenter?  

Strange issue, not SnortCenter related actually so anyone may have had this
issue before.  

I've setup my output plug-in correctly because I've got two other sensors
working fine.  

The third sensor I'm attempting to add is giving me a mysql connection
error.  I've made this sensor just like the rest.  

I can get SnortCenter to connect the sensor and push rules to the sensor
just fine but when I try to start the sensor I get this message;

IP's and names have been changed of course,
All three sensors are inside network sensors.  No outside interfaces.

Current config file error:
Running in IDS mode
Log directory = /var/log/snort

Initializing Network Interface eth1

--== Initializing Snort ==--
Rule application order changed to Pass->Alert->Log
Initializing Output Plugins!
Decoding Ethernet on interface eth1
Parsing Rules file /etc/snort/snort.eth1.conf

Initializing rule chains...
Initializing Preprocessors!
Initializing Plug-ins!
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: ACTIVE
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
Stream4_reassemble config:
Server reassembly: INACTIVE
Client reassembly: ACTIVE
Reassembler alerts: ACTIVE
Ports: 21 23 25 53 80 110 111 143 513 1433 
Emergency Ports: 21 23 25 53 80 110 111 143 513 1433 
http_decode arguments:
Unicode decoding
IIS alternate Unicode decoding
IIS double encoding vuln
Flip backslash to slash
Include additional whitespace separators
Ports to decode http on: 80 
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 
Conversation Config:
KeepStats: 0
Conv Count: 32000
Timeout : 60
Alert Odd?: 0
Allowed IP Protocols: All

ERROR: database: mysql_error: Can't connect to MySQL server on '10.x.x.x'
Fatal Error, Quitting..
database: compiled support for ( mysql )
database: configured to use mysql
database: user = xxxx
database: password is set
database: database name = xxxx
database: host = 10.x.x.x
database: sensor name = snort3
database: detail level = full  

Dave Powell - Network Analyst
Infrastructure 310-258-7140
Herbalife IT Department

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