Bugtraq mailing list archives
Re: Infosec.19990305.macof.a
From: woods () MOST WEIRD COM (Greg A. Woods)
Date: Sat, 8 May 1999 23:46:01 -0400
[ On Saturday, May 8, 1999 at 03:17:47 (+0100), Alan Cox wrote: ]
Subject: Re: Infosec.19990305.macof.a Your security is still totally illusionary. Treat a switch as a network accelerator thats all. Any security consultant who talks about switches as a security feature you should offer to sell a bridge too (london bridge that is). The only time the switch helps is if it has IP level filters
Well, um, actually it is supposedly possible to pre-program some switches with the MACs of the host(s) it should see on a given segment. Assuming you've done this, and that it's possible to stop the switch from learning new MACs (I've not yet tried this myself), it should make many of the attacks described to date much more difficult, if not impossible. In addition the switch *is* an extra level of defense, even if it's not 100% guaranteed, as it does prevent trivial sniffing (as anyone who grew up diagnosing Ethernet problems with packet sniffers can tell you!). -- Greg A. Woods +1 416 218-0098 VE3TCP <gwoods () acm org> <robohack!woods> Planix, Inc. <woods () planix com>; Secrets of the Weird <woods () weird com>
Current thread:
- Infosec.19990305.macof.a ian.vitek () INFOSEC SE (May 05)
- Re: Infosec.19990305.macof.a Emil Isberg (May 06)
- Re: Infosec.19990305.macof.a David Maxwell (May 06)
- <Possible follow-ups>
- Re: Infosec.19990305.macof.a Glen Turner (May 06)
- Re: Infosec.19990305.macof.a Alan Cox (May 07)
- Re: Infosec.19990305.macof.a Greg A. Woods (May 08)
- Re: Infosec.19990305.macof.a Alan Cox (May 09)
- OpenLinux 2.2: LISA install leaves root access without password Andrew McRory (May 08)
- Re: [linux-security] OpenLinux 2.2: LISA install leaves root Ralf Flaxa (May 09)
- SunOS 5.7 rmmount, no nosuid. Jonas Stahre (May 10)
- Re: SunOS 5.7 rmmount, no nosuid. C.J. Oster (May 10)
- nidsbench announcement Dug Song (May 13)
- Re: Infosec.19990305.macof.a Alan Cox (May 07)
- Adminisrivia Aleph One (May 10)
- [BIND-BUGS #18] Non-delegated master domains Ian Carr-de Avelon (May 10)
- Re: [BIND-BUGS #18] Non-delegated master domains Andrew Brown (May 11)
- Re: [BIND-BUGS #18] Non-delegated master domains Dan Busarow (May 11)