On Wed, Oct 24, 2012 at 01:21:33PM -0600, Theo de Raadt wrote: > What happens if one of your links goes down for a day? > > Do all your ssh sessions to everywhere in the world stay up? > > The internet has non-transient traffic, too. No, I will have to re-start some of them. This is something that can only be fixed by getting rid of the assumption about non-changing host addresses. The other solutions do not scale to the size of the Internet; I could get BGP at home but I don't want to, it is easier (and cheaper) to just restart connections in the rare event of one line breaking.
v4 vs v6 has very little to do with this; the world wants roaming and multi-homing, and BGP is not going to give it to the masses. NAT may enable multi-homing, but it does nothing to help roaming (on the contrary, state in the network makes it harder; and NATs tend to break my idle SSH sessions even when there is no fault in any line) Do your ssh sessions stay up if one of your upstreams starts blackholing but still announces you a full table of routes?
