Hi. On Mon, Jun 17, 2019 at 10:38:27AM -0400, Gene Heskett wrote: > But that opens yet another container of worms. If I arbitrarily assign > ipv6 local addresses, and later, ipv6 shows up at my side of the router, > what if I have an address clash with someone on a satellite circuit in > Ulan Bator. How is that resolved, by unroutable address blocks such as > 192.168.xx.xx is now?
More or less yes. It's called ULA (Unique Local Address) in IPv6 lingua. If you're using anything from fd00:/8 - you're safe. > What I've read so far has not addressed this serious security concern. > Or even mentioned it. I fail to see any security issue here. Availability - sure. > If in the future all addressing is by dhcpd6, Nobody does that, unless you're Amazon. It's either static, or RA. > how do the other machines on my local net, advertise their presence to the > other machines on my local net. IPv4 way of doing it is called ARP. IPv6 way of doing it is called ICMPv6 types 135 and 136. Both are limited to a single network segment (in a L2 sense of the word) by design, so the outside world is not aware of this. Reco