Snort mailing list archives
RE: HOME_NET var on snort.conf
From: "pfeito" <pfeito () netcabo pt>
Date: Sat, 22 Mar 2003 23:56:11 -0000
Forget! It's not possible to remove $HOME_NET from snort.conf, it breaks a lot of things and snort refuses to start. Right know I really don't know how to deal with this problem...
-----Original Message----- From: snort-users-admin () lists sourceforge net [mailto:snort-users- admin () lists sourceforge net] On Behalf Of pfeito Sent: segunda-feira, 22 de Março de 2004 20:52 To: snort-users () lists sourceforge net Subject: RE: [Snort-users] HOME_NET var on snort.conf That is weird, if it does not know what $<interface>_ADDRESS is, why does the default snort.conf provided in snort src 2.1.1 have the following lines? # You can specify it explicitly as: # # var HOME_NET 10.1.1.0/24 # # or use global variable $<interfacename>_ADDRESS which will be always # initialized to IP address and netmask of the network interface which # you run snort at. Why mention it if it doesnt exists? Anyway I looked at snorts manual and it seems that I'll be able to hack it like this: - Change /etc/init.d/snort - Add this to the beginning of /etc/init.d/snort MYIP=`ifconfig eth2 | grep 'inet addr:' | cut -d ':' -f2 | cut -d ' ' - f1` - Change the line that invokes snort In my case from: $SNORT_PATH/snort -c $CONFIG -i $IFACE -g $SNORT_GID $OPTIONS To: $SNORT_PATH/snort -c $CONFIG -i $IFACE -h $MYIP/32 -g $SNORT_GID $OPTIONS That seems to be working great. Of course the script must be invoked everytime the IP changes, but its not so difficult to write or reuse a perl script (for instance) to dynamically stop/start snort if the IP changes.-----Original Message----- From: neil [mailto:neil () bellsimons com] Sent: segunda-feira, 22 de Março de 2004 13:05 To: pfeito Cc: snort-users () lists sourceforge net Subject: Re: [Snort-users] HOME_NET var on snort.conf The variable does not exist within the file, your asking it to do something it doesn't know how to do. Your going to have to do some hacking to get the snort.conf to parse the ip address for you. Maybe this will help you a little: #!/usr/bin/perl #Roxcor Tech / www.pheusion.com / IPparse.pl $interface="eth0"; # path to ifconfig $ifconfig="/sbin/ifconfig"; @lines=qx|$ifconfig $interface| or die("Can't get info from ifconfig: ".$!); foreach(@lines){ if(/inet addr:([\d.]+)/){ print "$1\n"; } } On Sun, 2004-03-21 at 21:00, pfeito wrote:Hi! In snort.conf, I have HOME_NET var set like this: var HOME_NET $eth1_ADDRESS I start snort, but it does not start. In /var/log/messages I get the following information: Mar 22 01:44:01 snortbox snort: FATAL ERROR: Undefined variable name: (/etc/snort/snort.conf:46): eth1_ADDRESS Mar 22 01:44:01 snortbox kernel: device eth1 left promiscuous mode I have to set the IP address of the box manually, but this IP addressisassigned by my ISP, so it would be much better if "var HOME_NET $eth1_ADDRESS" method worked! An excerpt from my snort.conf: ################################################### # Step #1: Set the network variables: # # You must change the following variables to reflect your localnetwork.The# variable is currently setup for an RFC 1918 address space. # # You can specify it explicitly as: # # var HOME_NET 10.1.1.0/24 # # or use global variable $<interfacename>_ADDRESS which will be always # initialized to IP address and netmask of the network interface whichyourun # snort at. Under Windows, this must be specified as # $(<interfacename>_ADDRESS), such as: # $(\Device\Packet_{12345678-90AB-CDEF-1234567890AB}_ADDRESS) # # 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 any #var HOME_NET $eth1_ADDRESS <----ERROR var HOME_NET YYY.YYY.YYY.YYY/32 #obscured my current IP address Im running snort 2.1.1 on Fedora Core 1. What could be wrong? Any ideas ? ------------------------------------------------------- This SF.Net email is sponsored by: IBM Linux Tutorials Free Linux tutorial presented by Daniel Robbins, President and CEO of GenToo technologies. Learn everything from fundamentals to system administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://www.geocrawler.com/redir-sf.php3?list=snort-users------------------------------------------------------- This SF.Net email is sponsored by: IBM Linux Tutorials Free Linux tutorial presented by Daniel Robbins, President and CEO of GenToo technologies. Learn everything from fundamentals to system administration.http://ads.osdn.com/?ad_id70&alloc_id638&op=ick _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://www.geocrawler.com/redir-sf.php3?list=ort-users
------------------------------------------------------- This SF.Net email is sponsored by: IBM Linux Tutorials Free Linux tutorial presented by Daniel Robbins, President and CEO of GenToo technologies. Learn everything from fundamentals to system administration.http://ads.osdn.com/?ad_id70&alloc_id638&op=click _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://www.geocrawler.com/redir-sf.php3?list=snort-users
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- HOME_NET var on snort.conf pfeito (Mar 21)
- Re: HOME_NET var on snort.conf Paul Schmehl (Mar 21)
- Re: HOME_NET var on snort.conf neil (Mar 22)
- RE: HOME_NET var on snort.conf pfeito (Mar 22)
- RE: HOME_NET var on snort.conf pfeito (Mar 22)
- RE: HOME_NET var on snort.conf Michael Boman (Mar 22)
- RE: HOME_NET var on snort.conf pfeito (Mar 25)
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