Snort mailing list archives

Re: Config Question


From: James Jalbert <jjalbert () mail caribouschools org>
Date: Tue, 04 Apr 2006 07:14:35 -0400

Here is the Home_Net protion of my config. I tried to get the error message I recived when I tried this before, but damn if I typed the information in the config again, and this time snort started with no errors. I have not yet chacked BASE to besure that I am getting things, But could you verify that this is the proper context for me.

Thanks for the help



# var HOME_NET $eth0_ADDRESS
#
# You can specify lists of IP addresses for HOME_NET
# by separating the IPs with commas like this:
#
# var HOME_NET [10.1.1.0/24,192.168.1.0/24]
#
# MAKE SURE YOU DON'T PLACE ANY SPACES IN YOUR LIST!
#
# or you can specify the variable to be any IP address
# like this:

var HOME_NET xx.xx.94.0/23,xx.xx.72.0/23,xx.xx.74.128/25,xx.xx.74.0/25,xx.xx.75.0/25,xx.xx.75.128/26,xx.xx75.192/26


James Jalbert, MCP
Network Administrator
Caribou School Department
Phone: 207-493-4246
Cell: 207-551-9764
E-Mail: jjalbert () mail caribouschools org



Matt Kettler wrote:
James Jalbert wrote:
I am looking to see if it is possible to configure one snort machine for
many "Home" networks. I have 7 subnets that are the lan and wan for my
location. I tried to configure snort with the var home_net set with the
network address, but was unable to run snort after. For security reasons
I will not post entire IP's but will post last sections, please tell me
if I have done something wrong.

Subnets are :   xx.xx.94.0/23
                     xx.xx.72.0/23
                     xx.xx.74.0/25
                     xx.xx.74.128/25
                     xx.xx.75.0/25
                     xx.xx.75.128/26
                     xx.xx.75.192/26

Any thoughts or advice would be appreciated

Well, AFAIK, here's nothing intrinsically wrong with the above. However, I'd
have to assume you correctly built a home_net declaration that matched the
above. Given that you're having trouble running snort, it suggests the above is
not correct.

Can you post your home_net declaration from your snort.conf? Modified with the
same censoring as above is fine, I'm looking for syntactic errors in format, not
specific numbers. (Side note: Be aware this censoring of IPs only grants you
very little, if any, extra privacy.)

Can you post the output that occurs when you start snort manually from the
command line?  Do this without any "service" or other init scripts. Call snort
directly from the command-line with the appropriate parameters,  Leave off any
-D parameters. For most folks, this would just be snort -c /etc/snort.conf.







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