Re: [gentoo-user] Re: Local mail server

[Grant Taylor]

On 7/29/20 1:28 PM, Grant Edwards wrote:
> I don't know what most ISPs are doing.  I couldn't get IPv6 via
> Comcast (or whatever they're called this week) working with OpenWRT
> (probably my fault, and I didn't really need it). So I never figured
> out if the IPv6 address I was getting was static or not.

Ya....  That was probably a DHCPv6 for outside vs DHCPv6 Provider 
Delegation (PD) issue.  I remember running into that with Comcast.  I 
think for a while, they were mutually exclusive on Comcast.

> There is DHPCv6 (I've implemented it), but I have no idea if anybody
> actually uses it.  Even if they are using DHCPv6, they can be using
> it to hand out static addresses.

I've seen DHCPv6 used many times.  It can be stateless (in combination 
with SLAAC to manage the address) or stateful (where DHCPv6 manages the 
address).  Either way, there is a LOT more information that can be 
specified with DHCPv6 that simple SLAAC doesn't provide.  For a long 
time you couldn't dynamically determine DNS server IP addresses without 
DHCPv6 or static configuration.

> The assumption always seemed to be that switching to IPv6 meant the
> end of NAT

That's what the IPv6 Zealots want you to think.

> and the end of dynamic addresses.

Nope, not at all.



-- 
Grant. . . .
unix || die