Snort mailing list archives
RE: Re: Wiring a "read only" cable
From: "Chris Grout" <cgrout () s4r com>
Date: Thu, 29 Nov 2001 15:42:59 -0800
There's a couple of way to make a "receive only" cable. Clipping wires or pins on a regular CAT3/5/6 cable will not work (afaik). You won't be able to maintain link, and therefore the hardware at both ends will shut the connection down. The best method is to use a modified AUI - RJ45 adapter. With these you will still maintain link, receive 100% of the traffic, yet the system will not be able to send a single outbound packets. The other way is to untwist the transmit wires only and inducing enough problems on the wire so that the packets are totally mangled. Obviously, this method is like cutting out the tongue of the system. It certain can still make noise and could be detected. I have a number of these modified AUI adapters that I was planning to throw on ebay or something. Let me know if anyone wants one. -----Original Message----- From: snort-users-admin () lists sourceforge net [mailto:snort-users-admin () lists sourceforge net]On Behalf Of Flowers, Jay Sent: Thursday, November 29, 2001 2:41 PM To: 'snort-users () lists sourceforge net' Subject: RE: [Snort-users] Re: Wiring a "read only" cable So that doesn't work? Jay Flowers Integic Health Care -----Original Message----- From: Joe Pampel [mailto:joe () ardsley com] Sent: Thursday, November 29, 2001 4:30 PM To: snort-users () lists sourceforge net; snort-users-request () lists sourceforge net Subject: [Snort-users] Re: Wiring a "read only" cable What am I missing here? Trying to make a read only 100Base-T cable for a sensor and it has 8 pins - 4 pairs. So far so good. www.silicondefense.com has a schematic showing 14 pins and cutting pins 3 and 10... Can you see my confusion? My understanding of this kind of connector is like this: from : http://yoda.uvi.edu/InfoTech/rj45.htm ----------------------------------------------------------------------- Pin Number Designations Color Codes for T568B Pin color pair name --- ----- ---- --------- 1 wh/or 2 TxData + 2 or 2 TxData - 3 wh/grn 3 RecvData+ 4 blu 1 5 wh/blu 1 6 grn 3 RecvData- 7 wh/brn 4 8 brn 4 ------------------------------------------------ This would indicate not crimping the Orange pair to pins 1 & 2. And of course if you're a wise-guy you put a splitter on the jack and plug an RJ-11 in and use the middle pair for a POTS line.. but anyhow... ;-) Anyone else run into this? ps: wiring sucks when you're color blind. :-) - Joe _______________________________________________ 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 _______________________________________________ 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 _______________________________________________ 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
Current thread:
- Re: Wiring a "read only" cable Joe Pampel (Nov 29)
- <Possible follow-ups>
- RE: Re: Wiring a "read only" cable Flowers, Jay (Nov 29)
- Re: Wiring a "read only" cable Matt Kettler (Nov 29)
- RE: Re: Wiring a "read only" cable Chris Grout (Nov 29)
- Re: Wiring a "read only" cable Joe Pampel (Nov 30)