Re: Snort IPS with one NIC

[Dave Corsello <snort-users () wintertreemedia com>]

FYI - Neither the nfq nor the afpacket daq modules work with a single 
interface.

I believe AWS allows you to created a virtual machine with multiple 
network interfaces.  But it doesn't allow any components to be 
promiscuous, so this rules out Snort IPS on a network with multiple hosts.

I rigged up a work-around on a single-interface remote machine in which 
a simple perl script monitors an alert.fast log and inserts BLOCK rules 
in iptables for IPs that trigger priority 1 and 2 Snort alerts.

Blocking all priority-2-triggering IPs might be too coarse, but it's the 
best I can come up with for now.  Any suggestions?

On 10/12/2016 5:59 PM, Dave Corsello wrote:
> I am considering using a remotely hosted server as a web server, and
> would like to know if it is possible to protect it with Snort IPS.  I've
> been using Snort inline for several years using the usual 3
> interfaces--two bridged and one for management.  Can Snort be run in IPS
> mode to protect the local server with only one network interface?  Seems
> like this must have been asked many times before--sorry if this is a repeat.
>
>
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