[Snort-users] Snort and my VLANs

Joel Esler jesler at ...1935...
Fri Feb 15 08:00:12 EST 2013

Good to hear you got it!  

Joel Esler
Senior Research Engineer, VRT
Open Source Community Manager

On Thursday, February 14, 2013 at 7:06 PM, Josh Bitto wrote:

> Nevermind…..I figured what I was doing wrong…..I had everything working correctly and I can trigger events….I just installed a port scanner on one of the machines in a VLAN subnet and it triggered…..I’m good to go :D
> From: Y M [mailto:snort at ...15979...]  
> Sent: Thursday, February 14, 2013 2:08 PM
> To: Josh Bitto; snort-users at lists.sourceforge.net
> Subject: RE: [Snort-users] Snort and my VLANs
> In this case you would need to place sensors between vlans for vlan-to-vlan communication/detection since the traffic will not be reaching the edge WAN or router interface and Snort will not be seeing the traffic. However, if a BYOD is, for example, infected with a malware which may be attempting to communicate to an external IP, then it has to go through the edge router and hence get detected by Snort.
> This is where a distributed sensors deployment architecture would come in handy. I would suggest starting with, if you have one, the servers vlan to monitor any suspicious activity going to your servers.
> I hope my answer makes some sense.
> YM
> From: Josh Bitto (mailto:jbitto at ...16055...)
> Sent: ‎2/‎15/‎2013 12:57 AM
> To: snort-users at lists.sourceforge.net (mailto:snort-users at ...3471...ge.net)
> Subject: [Snort-users] Snort and my VLANs
> I’m having issues where I am not able to determine if I can actually catch bad traffic with snort.
> Right now I have snort in a test lab where I have interfaces WAN, LAN….and then my VLANS. My firewall does all the routing and has the vlans setup. So when I go to testmyids.com and trigger a rule I get the rule triggered on my WAN interface but not any of my VLANs……
> Basically what I’m trying to initiate is if a user brings in a byod…I want to be able to detect anything on that machine when it connects to my internal vlan.
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