Security Basics mailing list archives
RE: multicast connection trials from a home machine - is it regular?
From: "David Gillett" <gillettdavid () fhda edu>
Date: Wed, 16 Apr 2003 09:24:32 -0700
Normally multicast packages are not routed by default. I'm not quite sure if any ISP supports it. If they do, you are lucky. Otherwise you may need to install and configure a multicast router in your home scenario and setup a tunnel to an multicast endpoint. Jan Falkenreck
Normally multicast packages are not routed by default.
I'm not sure that this is a true statement. On LANs without IGMP support, what seems to happen "by default" is that when a station sends a multicast packet, it goes to the router, which attempts to deliver it by broadcasting it to at least the subnet it arrived from. (And this is why the multicast option in Symantec's Ghost tends to max out the router and flood the entire subnet....) It's not correct to assert that "network does not 'support' multicast" equates to "multicast traffic is harmlessly dropped". David Gillett --------------------------------------------------------------------------- Attend Black Hat Briefings & Training Europe, May 12-15 in Amsterdam, the world's premier event for IT and network security experts. The two-day Training features 6 hand-on courses on May 12-13 taught by professionals. The two-day Briefings on May 14-15 features 24 top speakers with no vendor sales pitches. Deadline for the best rates is April 25. Register today to ensure your place. http://www.securityfocus.com/BlackHat-security-basics ----------------------------------------------------------------------------
Current thread:
- multicast connection trials from a home machine - is it regular? ruben (Apr 15)
- RE: multicast connection trials from a home machine - is it regular? David Gillett (Apr 15)
- Re: multicast connection trials from a home machine - is it regular? ruben (Apr 16)
- RE: multicast connection trials from a home machine - is it regular? David Gillett (Apr 16)
- Re: multicast connection trials from a home machine - is it regular? Jan Falkenreck (Apr 16)
- RE: multicast connection trials from a home machine - is it regular? David Gillett (Apr 17)
- Re: multicast connection trials from a home machine - is it regular? ruben (Apr 16)
- Re: multicast connection trials from a home machine - is it regular? James-lists (Apr 16)
- Re: multicast connection trials from a home machine - is it regular? GSimmonds (Apr 17)
- <Possible follow-ups>
- Re: multicast connection trials from a home machine - is it regular? Chris Berry (Apr 17)
- RE: multicast connection trials from a home machine - is it regular? Cushing, David (Apr 17)
- RE: multicast connection trials from a home machine - is it regular? David Gillett (Apr 15)