Snort mailing list archives

Re: one way Ethernet cable performance


From: "Onie Camara" <neil () restricted dyndns org>
Date: Thu, 28 Feb 2002 09:28:55 -0600

Hi Keith,

Ok. Since the subject title contains "performance" :-)
what would be a good command line parameter to run snort in a production
environment?

Is mine good enough assuming I've got well-tuned rules?

snort -d -b -q -o -k none -c /etc/snort/snort.conf -l /var/log/snort

----- Original Message -----
From: "McCammon, Keith" <Keith.McCammon () eadvancemed com>
To: "Onie Camara" <neil () restricted dyndns org>; "Erek Adams"
<erek () theadamsfamily net>; "Mike Shaw" <mshaw () wwisp com>
Sent: Thursday, February 28, 2002 9:13 AM
Subject: RE: [Snort-users] one way Ethernet cable performance


That is correct.  One-way Ethernet cables are intended for passive
sensors.

-----Original Message-----
From: Onie Camara [mailto:neil () restricted dyndns org]
Sent: Thursday, February 28, 2002 10:01 AM
To: Erek Adams; Mike Shaw
Cc: snort-users () lists sourceforge net
Subject: Re: [Snort-users] one way ethernet cable performance


Am I right that using one way ethernet cable defeats the purpose of
snort's
flexresp
capability like tearing tcp connections?

----- Original Message -----
From: "Erek Adams" <erek () theadamsfamily net>
To: "Mike Shaw" <mshaw () wwisp com>
Cc: <snort-users () lists sourceforge net>
Sent: Thursday, February 28, 2002 5:21 AM
Subject: Re: [Snort-users] one way ethernet cable performance


On Wed, 27 Feb 2002, Mike Shaw wrote:

I'm about to work up a one-way cable (for use in a hub), but I'm a
bit
concerned about the effect it will have on the network.

Since the traffic is broadcast back out into the hub, does that
create
performance issues on that collision domain?  This will be at a
rather
critical point on a network and I can't afford to introduce ethernet
oddities.

Mike,

Actaully, have a look at this:
http://www.theadamsfamily.net/~erek/snort/  I've got a couple of links
on
RO
cables.  These don't suffer from that since the TX wires aren't even
connected.

Hope that helps!

-----
Erek Adams
Nifty-Type-Guy
TheAdamsFamily.Net


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