Snort mailing list archives
RE: IDS Placement ideas for inside and outside a firewall.
From: "Brian Laing" <Brian.Laing () Blade-Software com>
Date: Thu, 3 Apr 2003 08:27:54 -0800
I would agree with this sort of implementation, in many of the installs I have done I will setup the external sensors to do nothing but logging and ignore the data till I see something worth looking at on one of the internal servers. I use this data to see what else that IP has been doing or what other things have been attempted against a specific host ------------------------------------------------------------------- Brian Laing CTO Blade Software Cellphone: +1 650.280.2389 Telephone: +1 650 367.9376 eFax: +1 208.575.1374 Blade Software - Because Real Attacks Hurt http://www.Blade-Software.com ------------------------------------------------------------------- -----Original Message----- From: snort-users-admin () lists sourceforge net [mailto:snort-users-admin () lists sourceforge net] On Behalf Of David Glosser Sent: Wednesday, April 02, 2003 11:10 PM To: Brei, Matt; FWAdmin; snort-users () lists sourceforge net Subject: Re: [Snort-users] IDS Placement ideas for inside and outside a firewall. If you've never set up any IDS before, I'm not sure you would want to place it outside your firewall immediately You'lll get overwhelmed with probes,scans, script kiddies etc. First place the box (with the "snorting" NIC unnumbered). On the port monitoring the *internal* interface of your firewall. Let it work on all of the stuff your firewall lets through. Once you have that under control, then place another box (or another NIC on the same box) to monitor your internal servers (since breakins can come from internal users). Once you have these two under control, then you can worry monitoring stuff outside the firewall, which I believe is called *attack detection*. But do you care that much about the stuff your firewall is successfully blocking? --snip- I am trying to convince my company to implement IDS on our network but I have a few questions. I know I would want one on both sides of the firewall,
Current thread:
- IDS Placement ideas for inside and outside a firewall. Brei, Matt (Apr 02)
- <Possible follow-ups>
- RE: IDS Placement ideas for inside and outside a firewall. Brei, Matt (Apr 02)
- RE: IDS Placement ideas for inside and outside a firewall. Drew Stockman (Apr 02)
- RE: IDS Placement ideas for inside and outside a firewall. Brei, Matt (Apr 02)
- RE: IDS Placement ideas for inside and outside a firewall. Brei, Matt (Apr 02)
- Re: IDS Placement ideas for inside and outside a firewall. David Glosser (Apr 02)
- RE: IDS Placement ideas for inside and outside a firewall. Brian Laing (Apr 03)
- Re: IDS Placement ideas for inside and outside a firewall. David Glosser (Apr 02)
- RE: IDS Placement ideas for inside and outside a firewall. Brei, Matt (Apr 03)
- RE: IDS Placement ideas for inside and outside a firewall. Brian Laing (Apr 03)
- Re: IDS Placement ideas for inside and outside a firewall. David Glosser (Apr 03)