> Suffix should always be static with SLAAC because it’s your MAC address. Except for devices that randomize mac addresses. Normally even those that do that on

> Suffix should always be static with SLAAC because it’s your MAC address. Except for devices that randomize mac addresses. Normally even those that do that only try do so when connecting to a new network but that's not always reliable. > Even if you’re using privacy extensions (and you should) you should still be able listen on the MAC address one. I'm doubtful that all applications make that distinction and advertise the right address. If they just use some external "what is my IP" service to determine their address because that's what they did for IPv4 then they'll get the privacy address and advertise that to peers because that'll be picked by default for outgoing connections. Being able to allow incoming connections to a port for any address belonging to a particular machine would be less error-prone.