Snort mailing list archives
RE: Network placement / using a VLAN
From: JP Vossen <vossenjp () netaxs com>
Date: Mon, 7 Apr 2003 18:12:02 -0400 (EDT)
On Mon, 7 Apr 2003 snort-users-request () lists sourceforge net wrote:
Message: 2 Date: Mon, 07 Apr 2003 15:03:59 -0500 To: snort-users () lists sourceforge net From: Brian McIntyre <bmcintyre () therisingstar com> Subject: [Snort-users] Network placement / using a VLAN
<snip>
Question 2) I would also like to monitor my DMZ. How secure would it be to add a VLAN on my switch to connect my DMZ hosts on the same switch as my local subnet? While physically they reside on the same switch, they will be on seperate VLANs. Can I be certain I'm not introducing a *serious* security risk to my internal network? This might be a much better question to ask my switch vendor, and please shot me if I've lost my marbles..
That's a Bad Idea--don't do it! Always use different physical devices for networks with different trust levels. While I have never personally done it, I have been assured by people who I believe ARE capable of it that VLANs can be broken. Besides, do you trust the vendor to make a crashed VLAN/router "fail safe?" Low-end hubs/switches are dirt cheap (unless you need HA or managable stuff--totally depends on your needs and environment), and NICs are cheap too. You can add an unnumbered interface to your Snort box and plug in to the DMZ. This would require running a second Snort instance with suitable mods to the snort.conf file, and enough horsepower on the sensor... There have been lots of discussion of this kind of thing in the list archives. Later, JP ------------------------------|:::======|-------------------------------- JP Vossen, CISSP |:::======| jp () jpsdomain org My Account, My Opinions |=========| http://www.jpsdomain.org/ ------------------------------|=========|-------------------------------- "The software said it requires Windows 98 or better, so I installed Linux..." ------------------------------------------------------- This SF.net email is sponsored by: ValueWeb: Dedicated Hosting for just $79/mo with 500 GB of bandwidth! No other company gives more support or power for your dedicated server http://click.atdmt.com/AFF/go/sdnxxaff00300020aff/direct/01/ _______________________________________________ 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
Current thread:
- Network placement / using a VLAN Brian McIntyre (Apr 07)
- Re: Network placement / using a VLAN Erek Adams (Apr 08)
- <Possible follow-ups>
- RE: Network placement / using a VLAN JP Vossen (Apr 07)