Snort mailing list archives
RE: Found true hub
From: Michael Miller <michael.miller () state co us>
Date: Mon, 22 Nov 2004 11:32:40 -0700
Having run into this problem with a load balanced webserver (not as an IDS issue), we ran into the problems you mentioned with the linksys product. 3com's 'superstack 3 baseline 10/100 hub' is working well as a hub. (Again with the caveat that it's got nothing but 100 mbit traffic moving across it.) -----Original Message----- From: snort-users-admin () lists sourceforge net [mailto:snort-users-admin () lists sourceforge net] On Behalf Of Richard Bejtlich Sent: Friday, November 19, 2004 1:54 PM To: snort-users () lists sourceforge net Subject: RE: [Snort-users] Found true hub John McCash wrote:
Gullermo, Ummm... from the writeup on that device on the CDW website:
"Full connectivity among devices Each unit has a built-in self-learning bridge which provides the communications link between the 10 and 100Mbps network devices. The intelligent bridge automatically manages network traffic such that 100 Mbps traffic does not unnecessarily crowd the 10Mbps network segment and 10Mbps traffic does not crowd the 100Mbps segment."
Are you SURE that this isn't dropping some of the traffic that you're supposedly monitoring? It would not necessarily be obvious, especially over a slower link. I suppose that it's possible that this functionality only kicks in between 10 and 100 MB links, but the comment makes me suspicious nonetheless. John
John and Gullermo, Any device that is not a strict 10 Mbps or 100 Mbps device is not a "true hub." Any 10/100 Mbps device is a switch. However, as I believe Bill originally posted, some 10/100 Mbps "hubs" can act like "true hubs" when all connected devices are configured to operate at the same speed -- either all at 10 Mbps or all at 100 Mbps. In my personal experience NetGear 10/100 Mbps hubs act as "true hubs" but Linksys 10/100 Mbps "hubs" do not. When researching chapter 3 for my book, I could not find any small-scale strict 100 Mbps hubs. [0] Netgear does make 4 and 8 port 10 Mbps hubs. Sincerely, Richard http://www.taosecurity.com [0] http://www.taosecurity.com/books.html ------------------------------------------------------- This SF.Net email is sponsored by: InterSystems CACHE FREE OODBMS DOWNLOAD - A multidimensional database that combines robust object and relational technologies, making it a perfect match for Java, C++,COM, XML, ODBC and JDBC. www.intersystems.com/match8 _______________________________________________ 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 ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://productguide.itmanagersjournal.com/ _______________________________________________ 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:
- Found true hub Bill Warren (Oct 01)
- Re: Found true hub Frank Knobbe (Oct 01)
- <Possible follow-ups>
- Re: Found true hub McCash, John (Nov 19)
- RE: Found true hub Guillermo Calvo (Nov 19)
- RE: Found true hub McCash, John (Nov 19)
- RE: Found true hub Guillermo Calvo (Nov 19)
- RE: Found true hub Richard Bejtlich (Nov 19)
- RE: Found true hub Guillermo Calvo (Nov 19)
- RE: Found true hub Michael Miller (Nov 22)