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| Author |
[Snort-users] confuse with alerts file
|
|
| maku bex 2004-09-28, 8:03 am |
| i'm just started with snort.....the sensor was running
fine lately.....
but sometimes.....when i'm trying to play around with
it into another
new box.....the snort itself
is not generate any output into alerts file which is
located in /var/log/snort
FYI, i usually use this configuration...
[snort.conf]
output database: log, mysql,
and i run with this command...
snort -qbID -i eth0 -c /etc/snort/snort.conf -u snort
-g snort m 007
then i cd to /var/log/snort/
what i'm confused is theres no alerts file here but
except of snort.log.smething
so i tail messages log in /var/log/ , yes the snort
can see packets
going through....
but why it not generates the alerts file like in the
1st box...?
can anyone help me out....
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| |
| Esler, Joel - Contractor 2004-09-28, 5:47 pm |
| Because you are using the -b option (binary logging) it is logging into
pcap format. Remove the -b to generate an alert file. However, -b is
much more useful if you are familiar with Tcpdump or ethereal.
Joel
-----Original Message-----
From: snort-users-admin@lists.sourceforge.net
[mailto:snort-users-admin@lists.sourceforge.net] On Behalf Of maku bex
Sent: Monday, September 27, 2004 8:06 AM
To: snort-users@lists.sourceforge.net
Subject: [Snort-users] confuse with alerts file
i'm just started with snort.....the sensor was running
fine lately.....
but sometimes.....when i'm trying to play around with
it into another
new box.....the snort itself
is not generate any output into alerts file which is
located in /var/log/snort
FYI, i usually use this configuration...
[snort.conf]
output database: log, mysql,
and i run with this command...
snort -qbID -i eth0 -c /etc/snort/snort.conf -u snort
-g snort m 007
then i cd to /var/log/snort/
what i'm confused is theres no alerts file here but
except of snort.log.smething
so i tail messages log in /var/log/ , yes the snort
can see packets
going through....
but why it not generates the alerts file like in the
1st box...?
can anyone help me out....
=09
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| |
| Bamm Visscher 2004-09-28, 5:47 pm |
| Comments inline.
On Tue, 28 Sep 2004 12:06:54 -0400, Esler, Joel - Contractor
<joel.esler@rcert-s.XXXXXXXXX> wrote:
> Because you are using the -b option (binary logging) it is logging into
> pcap format. Remove the -b to generate an alert file. However, -b is
> much more useful if you are familiar with Tcpdump or ethereal.
>
> Joel
>
No, that is not correct. The -b (binary logging) option has nothing to
do with an alert file being generated. I am not sure why the output
facilities are so misunderstood, but here again is an explanation.
Snort has two output facilities: alert and log. The default plugin for
the alert facility is ALERT_FULL and the default log facility is
LOG_ASCII. ALERT_FULL is your std alert output to the /var/log/alert
file, while LOG_ASCII writes packet data in ascii format to
directories and files based on ip address/protos/ports/etc. The -b
option changes the default behavior of the log facility only (to
LOG_PCAP).
>
>
> -----Original Message-----
> From: snort-users-admin@lists.sourceforge.net
> [mailto:snort-users-admin@lists.sourceforge.net] On Behalf Of maku bex
> Sent: Monday, September 27, 2004 8:06 AM
> To: snort-users@lists.sourceforge.net
> Subject: [Snort-users] confuse with alerts file
>
> i'm just started with snort.....the sensor was running
> fine lately.....
> but sometimes.....when i'm trying to play around with
> it into another
> new box.....the snort itself
> is not generate any output into alerts file which is
> located in /var/log/snort
> FYI, i usually use this configuration...
> [snort.conf]
> output database: log, mysql,
>
> and i run with this command...
> snort -qbID -i eth0 -c /etc/snort/snort.conf -u snort
> -g snort m 007
>
> then i cd to /var/log/snort/
> what i'm confused is theres no alerts file here but
> except of snort.log.smething
> so i tail messages log in /var/log/ , yes the snort
> can see packets
> going through....
> but why it not generates the alerts file like in the
> 1st box...?
> can anyone help me out....
Sounds like you may have your database output plugin set to use the
alert facility (output database: alert VERSUS output database: log).
I'd double check that.
Bammkkkk
--
sguil - The Analyst Console for NSM
http://sguil.sf.net
-------------------------------------------------------
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| |
| Esler, Joel - Contractor 2004-09-28, 5:47 pm |
| In the default setup, if you log to binary it /will not/ generate the
ascii mode, however, maku says that the log files being produced are
snort.log.###.. This is indicative of binary logging mode.
J
-----Original Message-----
From: Bamm Visscher [mailto:bamm.visscher@gmail.com]=20
Sent: Tuesday, September 28, 2004 3:07 PM
To: Esler, Joel - Contractor
Cc: maku bex; snort-users@lists.sourceforge.net
Subject: Re: [Snort-users] confuse with alerts file
Comments inline.
On Tue, 28 Sep 2004 12:06:54 -0400, Esler, Joel - Contractor
<joel.esler@rcert-s.XXXXXXXXX> wrote:
> Because you are using the -b option (binary logging) it is logging=20
> into pcap format. Remove the -b to generate an alert file. However,=20
> -b is much more useful if you are familiar with Tcpdump or ethereal.
>=20
> Joel
>=20
No, that is not correct. The -b (binary logging) option has nothing to
do with an alert file being generated. I am not sure why the output
facilities are so misunderstood, but here again is an explanation.
Snort has two output facilities: alert and log. The default plugin for
the alert facility is ALERT_FULL and the default log facility is
LOG_ASCII. ALERT_FULL is your std alert output to the /var/log/alert
file, while LOG_ASCII writes packet data in ascii format to directories
and files based on ip address/protos/ports/etc. The -b option changes
the default behavior of the log facility only (to LOG_PCAP).
>=20
>=20
> -----Original Message-----
> From: snort-users-admin@lists.sourceforge.net
> [mailto:snort-users-admin@lists.sourceforge.net] On Behalf Of maku bex
> Sent: Monday, September 27, 2004 8:06 AM
> To: snort-users@lists.sourceforge.net
> Subject: [Snort-users] confuse with alerts file
>=20
> i'm just started with snort.....the sensor was running
> fine lately.....
> but sometimes.....when i'm trying to play around with
> it into another
> new box.....the snort itself
> is not generate any output into alerts file which is
> located in /var/log/snort
> FYI, i usually use this configuration...
> [snort.conf]
> output database: log, mysql,
>=20
> and i run with this command...
> snort -qbID -i eth0 -c /etc/snort/snort.conf -u snort
> -g snort m 007
>=20
> then i cd to /var/log/snort/
> what i'm confused is theres no alerts file here but
> except of snort.log.smething
> so i tail messages log in /var/log/ , yes the snort
> can see packets
> going through....
> but why it not generates the alerts file like in the
> 1st box...?
> can anyone help me out....
Sounds like you may have your database output plugin set to use the
alert facility (output database: alert VERSUS output database: log). I'd
double check that.
Bammkkkk
--=20
sguil - The Analyst Console for NSM
http://sguil.sf.net
-------------------------------------------------------
This SF.net email is sponsored by: IT Product Guide on ITManagersJournal
Use IT products in your business? Tell us what you think of them. Give us
Your Opinions, Get Free ThinkGeek Gift Certificates! Click to find out more
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________________________________________
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Go to this URL to change user options or unsubscribe:
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| |
| Bamm Visscher 2004-09-28, 5:47 pm |
| Yes, he is LOGing to binary (I see the -b option), but he is ALERTing
to something else. If you do NOT define an alert output in your
snort.conf or on the cmd line, but use -b on the command line, you
will ALERT to /var/log/snort/alert and LOG to snort.log.########. LOG
and ALERT are two seperate facilities. One switch CANNOT affect them
both. In my previous response, my guess was that he is using "output
database: alert, blah" in his snort.conf on the second machine and
"output database: log" on the original. I just reread his post
though, and I think he is saying he sees alert data in
/var/log/messages (it's a hard post to follow), so he must of turned
on the ALERT_SYSLOG function in his snort.conf on the second machine
or is using switches not included in his original post.
Maku,
Can you send the exact cmd line switches and output of `grep '^output'
snort.conf` to the list?
Bammkkkk
On Tue, 28 Sep 2004 15:15:45 -0400, Esler, Joel - Contractor
<joel.esler@rcert-s.XXXXXXXXX> wrote:
> In the default setup, if you log to binary it /will not/ generate the
> ascii mode, however, maku says that the log files being produced are
> snort.log.###.. This is indicative of binary logging mode.
>
> J
>
>
>
> -----Original Message-----
> From: Bamm Visscher [mailto:bamm.visscher@gmail.com]
> Sent: Tuesday, September 28, 2004 3:07 PM
> To: Esler, Joel - Contractor
> Cc: maku bex; snort-users@lists.sourceforge.net
> Subject: Re: [Snort-users] confuse with alerts file
>
> Comments inline.
>
> On Tue, 28 Sep 2004 12:06:54 -0400, Esler, Joel - Contractor
> <joel.esler@rcert-s.XXXXXXXXX> wrote:
>
> No, that is not correct. The -b (binary logging) option has nothing to
> do with an alert file being generated. I am not sure why the output
> facilities are so misunderstood, but here again is an explanation.
>
> Snort has two output facilities: alert and log. The default plugin for
> the alert facility is ALERT_FULL and the default log facility is
> LOG_ASCII. ALERT_FULL is your std alert output to the /var/log/alert
> file, while LOG_ASCII writes packet data in ascii format to directories
> and files based on ip address/protos/ports/etc. The -b option changes
> the default behavior of the log facility only (to LOG_PCAP).
>
>
> Sounds like you may have your database output plugin set to use the
> alert facility (output database: alert VERSUS output database: log). I'd
> double check that.
>
> Bammkkkk
>
> --
> sguil - The Analyst Console for NSM
> http://sguil.sf.net
>
--
sguil - The Analyst Console for NSM
http://sguil.sf.net
-------------------------------------------------------
This SF.net email is sponsored by: IT Product Guide on ITManagersJournal
Use IT products in your business? Tell us what you think of them. Give us
Your Opinions, Get Free ThinkGeek Gift Certificates! Click to find out more
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________________________________________
_______
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Go to this URL to change user options or unsubscribe:
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| |
| maku bex 2004-09-29, 2:56 am |
| thx for replying...
the scenario is i have a one box installed with
snort..
and i'm trying to deploy the snort into another box as
well, the configuration is same
[snort.conf]
[Unix flavours should use this format...]
output alert_syslog: LOG_AUTH LOG_ALERT
output database: log, mysql,
for both snort i run with this command
snort -qbID -i eth0 -c /etc/snort/snort.conf -u snort
-g snort m 007
for box one....its generates the alert file....
tail -f /var/log/snort/alert
Sep 29 09:53:00 src@marc-sguard snort: [1:2000328:3]
BLEEDING-EDGE Multiple Non-SMTP Server Emails
[Classification: Misc activity] [Priority: 3]: <eth0>
{TCP} x.x.x.x:1138 -> x.x.x.x:25
Sep 29 09:53:04 src@marc-sguard snort: [1:2000328:3]
BLEEDING-EDGE Multiple Non-SMTP Server Emails
[Classification: Misc activity] [Priority: 3]: <eth0>
{TCP} x.x.x.x:1144 -> x.x.x.74:25
But for the second one....like i said...no alert file
in /var/log/snort/, which is i dont quite understand
here...i guest the snort is not running......so i tail
the messages log
ping www.google.com
tail -f /var/log/messages
it gives me the output:
Sep 29 10:48:21 vmware snort: Warning: flowbits key
'tls1.server_hello.request' is checked but not ever
set.
Sep 29 10:48:21 vmware snort: Warning: flowbits key
'tls.client_hello.request' is checked but not ever
set.
Sep 29 10:48:22 vmware snort: Snort initialization
completed successfully
Sep 29 10:38:28 vmware snort: [1:408:5] ICMP Echo
Reply [Classification: Misc activity] [Priority: 3]:
<eth0> {ICMP} 216.239.39.99 -> 192.168.0.35
any ideas..?
--- Bamm Visscher <bamm.visscher@gmail.com> wrote:
> Yes, he is LOGing to binary (I see the -b option),
> but he is ALERTing
> to something else. If you do NOT define an alert
> output in your
> snort.conf or on the cmd line, but use -b on the
> command line, you
> will ALERT to /var/log/snort/alert and LOG to
> snort.log.########. LOG
> and ALERT are two seperate facilities. One switch
> CANNOT affect them
> both. In my previous response, my guess was that he
> is using "output
> database: alert, blah" in his snort.conf on the
> second machine and
> "output database: log" on the original. I just
> reread his post
> though, and I think he is saying he sees alert data
> in
> /var/log/messages (it's a hard post to follow), so
> he must of turned
> on the ALERT_SYSLOG function in his snort.conf on
> the second machine
> or is using switches not included in his original
> post.
>
> Maku,
>
> Can you send the exact cmd line switches and output
> of `grep '^output'
> snort.conf` to the list?
>
> Bammkkkk
>
>
>
> On Tue, 28 Sep 2004 15:15:45 -0400, Esler, Joel -
> Contractor
> <joel.esler@rcert-s.XXXXXXXXX> wrote:
> /will not/ generate the
> being produced are
> logging mode.
> [mailto:bamm.visscher@gmail.com]
> file
> Contractor
> logging) it is logging
> alert file. However,
> Tcpdump or ethereal.
> option has nothing to
> sure why the output
> an explanation.
> The default plugin for
> log facility is
> the /var/log/alert
> format to directories
> The -b option changes
> LOG_PCAP).
> On Behalf Of maku bex
> running
> with
> which is
> snort
> but
> snort
> the
> plugin set to use the
> output database: log). I'd
>
>
>
> --
> sguil - The Analyst Console for NSM
> http://sguil.sf.net
>
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| |
| Bamm Visscher 2004-09-29, 7:57 pm |
| The line "output alert_syslog: LOG_AUTH LOG_ALERT" is causing alerts
to go to syslog.
Add the line "output alert_full: alert" for alerting to /var/log/snort/alert.
Bammkkkk
On Tue, 28 Sep 2004 19:54:15 -0700 (PDT), maku bex <maku_bexs@yahoo.com> wrote:
> thx for replying...
> the scenario is i have a one box installed with
> snort..
> and i'm trying to deploy the snort into another box as
> well, the configuration is same
> [snort.conf]
> [Unix flavours should use this format...]
> output alert_syslog: LOG_AUTH LOG_ALERT
> output database: log, mysql,
>
> for both snort i run with this command
> snort -qbID -i eth0 -c /etc/snort/snort.conf -u snort
> -g snort m 007
>
> for box one....its generates the alert file....
> tail -f /var/log/snort/alert
>
> Sep 29 09:53:00 src@marc-sguard snort: [1:2000328:3]
> BLEEDING-EDGE Multiple Non-SMTP Server Emails
> [Classification: Misc activity] [Priority: 3]: <eth0>
> {TCP} x.x.x.x:1138 -> x.x.x.x:25
> Sep 29 09:53:04 src@marc-sguard snort: [1:2000328:3]
> BLEEDING-EDGE Multiple Non-SMTP Server Emails
> [Classification: Misc activity] [Priority: 3]: <eth0>
> {TCP} x.x.x.x:1144 -> x.x.x.74:25
>
> But for the second one....like i said...no alert file
> in /var/log/snort/, which is i dont quite understand
> here...i guest the snort is not running......so i tail
> the messages log
>
> ping www.google.com
> tail -f /var/log/messages
> it gives me the output:
> Sep 29 10:48:21 vmware snort: Warning: flowbits key
> 'tls1.server_hello.request' is checked but not ever
> set.
> Sep 29 10:48:21 vmware snort: Warning: flowbits key
> 'tls.client_hello.request' is checked but not ever
> set.
> Sep 29 10:48:22 vmware snort: Snort initialization
> completed successfully
> Sep 29 10:38:28 vmware snort: [1:408:5] ICMP Echo
> Reply [Classification: Misc activity] [Priority: 3]:
> <eth0> {ICMP} 216.239.39.99 -> 192.168.0.35
>
> any ideas..?
>
>
>
>
> --- Bamm Visscher <bamm.visscher@gmail.com> wrote:
>
>
>
> _______________________________
> Do you Yahoo!?
> Declare Yourself - Register online to vote today!
> http://vote.yahoo.com
>
> -------------------------------------------------------
> This SF.net email is sponsored by: IT Product Guide on ITManagersJournal
> Use IT products in your business? Tell us what you think of them. Give us
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>
>
> ________________________________________
_______
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> Go to this URL to change user options or unsubscribe:
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>
--
sguil - The Analyst Console for NSM
http://sguil.sf.net
-------------------------------------------------------
This SF.net email is sponsored by: IT Product Guide on ITManagersJournal
Use IT products in your business? Tell us what you think of them. Give us
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