Snort mailing list archives
RE: A question about taps
From: Eric Hines <eric.hines () appliedwatch com>
Date: Fri, 16 Sep 2005 10:24:27 -0500
Gary, some Taps exist, such as the "Active Response" taps offered from Net Optics that allow you to send traffic back out through the monitoring ports to the network. The Active Response capabilities of their taps allow you to hang an IDS or IPS off the monitoring port that allow ICMP unreachable and TCP shuns to be sent through the tap to src/dst. Just to name a few: Active Response Port Aggregator Tap http://www.netoptics.com/products/product_family_details.asp?cid=4&pid=115&Section=products&menuitem=4&tag=NetOptics Active Response Dual Port Aggregator Tap http://www.netoptics.com/products/product_family_details.asp?cid=4&pid=104&Section=products&menuitem=4&tag=NetOptics Best Regards, Eric Hines, GCIA, CISSP CEO, President Applied Watch Technologies, LLC 1095 Pingree Road Suite 213 Crystal Lake, IL 60014 Tel: (877) 262-7593 ext:327 Virginia Office (Intelligence/Dept. of Defense) Cleared Personnel: TS/SCI with Polygraph 4524 Waverly Crossing Lane Chantilly, Va. 20151 Toll Free: (877) 262-7593 Fax: (877) 262-7593 Hours: 9am-5pm EST On Fri, 2005-09-16 at 15:51 +0100, Brett, Gary wrote:
Thanks guys , I have a far better understanding of this now....it is indeed a splitter that I have but it was sold to me as a tap, however from my understanding proper taps don't allow transmitted packets from the monitor port (which makes sense to keep your sensor "invisible" on the wire) but this splitter sends and receives everything.. Might be ok for my test environment though Thanks again -----Original Message----- From: Richard Bejtlich [mailto:taosecurity () gmail com] Sent: 16 September 2005 15:36 To: snort-users () lists sourceforge net Cc: gary.brett () cetelem co uk Subject: Re: [Snort-users] A question about taps Gary Brett wrote:Just a quick question, I have in my possession a simple little plastic tap (basically a little adapter type thing that has 3 RJ48 ports on it, it is not a powered device just a little internally wired adapter). Aftertestingit, it does exactly what a tap should do and outputs all traffic itreceiveson any of the 3 ports to all the other ports.Hi Gary, I bet I have a device similar to that in front of me now. I bought it at Radio Shack to see how it worked. I still have the device in the box because it is worthless for most situations. (I should have returned it!) It's item 278-785, "Ethernet 10 Base-T Computer Network Cable Splitter." Radio Shack provides the wiring diagram. [0] A search for the part number reveals other people found it to be worthless too. Alternative solutions are listed here. [1] The problem with these systems is the lack of signal regeneration. Without power you will have a weaker signal. Over distance you will lose frames. I would not use anything like this in production. Even a powered hub is a better solution than this device. This unpowered splitter is essentially the same as the do-it-yourself "taps" that are unfortunately documented elsewhere. [2] Sincerely, Richard http://www.taosecurity.com [0] http://support.radioshack.com/support_supplies/doc66/66324.pdf [1] http://www.duxcw.com/digest/Reviews/Network/ats/index.html [2] http://www.snort.org/docs/tap/ ------------------------------------------------------- SF.Net email is sponsored by: Tame your development challenges with Apache's Geronimo App Server. Download it for free - -and be entered to win a 42" plasma tv or your very own Sony(tm)PSP. Click here to play: http://sourceforge.net/geronimo.php _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://www.geocrawler.com/redir-sf.php3?list=snort-users
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Current thread:
- A question about taps Brett, Gary (Sep 16)
- Re: A question about taps Ted Kaczmarek (Sep 16)
- Re: A question about taps Joel Esler (Sep 16)
- Re: A question about taps Eric Hines (Sep 16)
- Re: A question about taps Eric Hines (Sep 16)
- <Possible follow-ups>
- Re: A question about taps Richard Bejtlich (Sep 16)
- RE: A question about taps Brett, Gary (Sep 16)
- RE: A question about taps Eric Hines (Sep 16)