nanog mailing list archives
Re: turning on comcast v6
From: "Ricky Beam" <jfbeam () gmail com>
Date: Sat, 04 Jan 2014 01:06:56 -0500
On Fri, 03 Jan 2014 20:52:25 -0500, Owen DeLong <owen () delong com> wrote:
Not entirely true, actually… If you’re willing to work hard enough at it, most hosts can be “encouraged” to renew early.
Short of commandline access, no there isn't. (crashing or otherwise triggering a reboot, isn't a "renew"; that's a full broadcast restart) And RENEW isn't at issue as that's a unicast request directly with the original DHCP server. Simply turning up your own instance will do nothing there. (attempting to impersonate the real server isn't what were talking about.)
For IPv6, you can become a/the router for a segment with the origination of a single packet. Instantly. That's something you can never do with DHCPv4.
Well… Sure, 15 years after DHCP attacks first started being a serious problem… I doubt it will take anywhere near 15 years for RA guard on by default to be the norm in switches, etc.
It'll **NEVER** be a default because it breaks too many clueless people's networks. Just like, surprise, DHCP "guard" isn't on by default in any gear I'm aware of.
Current thread:
- Re: turning on comcast v6, (continued)
- Re: turning on comcast v6 Doug Barton (Jan 03)
- Re: turning on comcast v6 Baldur Norddahl (Jan 03)
- Re: turning on comcast v6 Doug Barton (Jan 03)
- Re: turning on comcast v6 Baldur Norddahl (Jan 04)
- Re: turning on comcast v6 Doug Barton (Jan 06)
- Re: turning on comcast v6 Owen DeLong (Jan 06)
- Re: turning on comcast v6 Matt Palmer (Jan 03)
- Re: turning on comcast v6 Owen DeLong (Jan 03)
- Re: turning on comcast v6 Paul Ferguson (Jan 03)
- RE: turning on comcast v6 Raymond Burkholder (Jan 03)
- Re: turning on comcast v6 Ricky Beam (Jan 03)
- Re: turning on comcast v6 Owen DeLong (Jan 04)
- Re: turning on comcast v6 Ricky Beam (Jan 06)
- Re: turning on comcast v6 Owen DeLong (Jan 06)
- Re: turning on comcast v6 Paul Ferguson (Jan 06)
- Re: turning on comcast v6 Owen DeLong (Jan 06)
- Re: turning on comcast v6 Aled Morris (Jan 06)
- Re: turning on comcast v6 Leo Bicknell (Jan 04)
- Re: turning on comcast v6 Valdis . Kletnieks (Jan 05)
- Re: turning on comcast v6 Leo Bicknell (Jan 06)
- Re: turning on comcast v6 Valdis . Kletnieks (Jan 06)