IDS mailing list archives
Re: Cisco CTR
From: Martin Roesch <roesch () sourcefire com>
Date: Mon, 17 Nov 2003 17:40:30 -0500
On Nov 17, 2003, at 4:55 PM, Renaud Deraison wrote:
On Mon, Nov 17, 2003 at 03:03:32PM -0500, Martin Roesch wrote: [Disclaimer: I co-designed NeVO]Nevo is being billed as a passive vulnerability "scanner" whereas RNA is being billed as a passive network discovery system.No - you're playing with words.
That wasn't my intention, I was just trying to highlight the difference in the focus of the products.
When designing a vulnerability scanner, you need it to give you information about the network assets (OS,ports, versions...) - the simple fact that a mysterious port is open can be avulnerability in itself.
Right.
Having designed Nessus before NeVO, I decidedto take the exact same approach: report whatever can be reported as long as itmake sense (reporting the "MAC address" of a host which is one hop away does not, for instance).
Reporting the MAC address of the gateway interface that the traffic is coming from can be interesting if you're interested in topology.
What NeVO does not do though, is to draw a topology map based on thenumber of hops separating the sensor from the remote hosts, since this is only 1d data, and adding a 2nd or 3rd dimension to it relies on best guesses,and in the end it does not reflect the reality.
You can infer a number of interesting things from looking at MAC addresses, hop data, peer information and so on. In the general case the information will be accurate, in some cases it will not, it's still interesting and useful for certain applications.
Finally, keep in mind that NeVO is really just a sensor and that it's best to exploit its data with our Lightning Console, otherwise I understand that theamount of information might be difficult to grasp.
We can see the value of having a process that identifies new/changed things to be fully explored by active vulnerability scanners, I'm not suggesting that you can replace a vulnerability scanner with a PNDS.
There was an earlier post referring to RNA and Ron added that Nevo was available and did similar things. I was interested in contrasting them so that the readers of this list who are seeing this as a brand new technology would have some points of reference as to where they are similar and where the differ. From the marketing that I've seen on your web site you're positioning Nevo as a passive vulnerability scanning system, our marketing describes a different set of objectives. I don't doubt that you can do similar things with Nevo, it just seems that the emphasis and focus of your product is in a different direction than ours. If that's not the case I'm sure that everyone here would enjoy being enlightened as to what you guys are up to with your product.
-Marty -- Martin Roesch - Founder/CTO, Sourcefire Inc. - (410)290-1616 Sourcefire: Snort-based Enterprise Intrusion Detection Infrastructure roesch () sourcefire com - http://www.sourcefire.com Snort: Open Source Network IDS - http://www.snort.org --------------------------------------------------------------------------- Network with over 10,000 of the brightest minds in information security at the largest, most highly-anticipated industry event of the year. Don't miss RSA Conference 2004! Choose from over 200 class sessions and see demos from more than 250 industry vendors. If your job touches security, you need to be here. Learn more or register athttp://www.securityfocus.com/sponsor/RSA_focus-ids_031023 and use priority code SF4.
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Current thread:
- Re: Cisco CTR, (continued)
- Re: Cisco CTR John Lampe (Nov 13)
- Re: Cisco CTR Martin Roesch (Nov 17)
- Re: Cisco CTR Ron Gula (Nov 17)
- Re: Cisco CTR Martin Roesch (Nov 17)
- Re: Cisco CTR Ron Gula (Nov 17)
- Re: Cisco CTR Martin Roesch (Nov 19)
- Re: Cisco CTR Ron Gula (Nov 19)
- Re: Cisco CTR Martin Roesch (Nov 20)
- Re: Cisco CTR Ron Gula (Nov 19)
- Re: Cisco CTR Renaud Deraison (Nov 19)
- Re: Cisco CTR Martin Roesch (Nov 19)
- Re: Cisco CTR Renaud Deraison (Nov 20)
- Re: Cisco CTR Martin Roesch (Nov 20)
- Re: Cisco CTR Renaud Deraison (Nov 20)
- Message not available
- Re: Cisco CTR Mark Teicher (Nov 20)
- Re: Cisco CTR Ron Gula (Nov 20)
- RE: Cisco CTR David J. Meltzer (Nov 25)
- Re: Cisco CTR Martin Roesch (Nov 27)