Hello Markus,   
      
   On Saturday October 03 2015 10:49, you wrote to me:   
      
      
    MR> I agree, that PE is nonsense for a server. Also SLAAC/DHCPv6 aren't   
    MR> helpful  in this case. But it's not generally a bad idea to enable PE   
    MR> for PCs with a static prefix. SLAAC assigned addresses are based on   
    MR> the NIC's MAC address. If you want to make life a little bit harder   
    MR> for all those trackers, PE comes in handy.   
      
   Indeed the MAC address gives out some information. I doubt it is all that   
   useful for a hacker and if he wants the MAC address that he can not entice the   
   system to reveal it in some other way.   
      
    MR> And DNS is no real issue since most are used to DynDNS for quite a   
    MR> while.   
      
   Really? I haven't used it in years.. And only for IPv4, never for IPv6.   
      
    MR> With SLAAC you would have to manage DNS dynamically anyway, because a   
    MR> new NIC (replacement for a broken one, new mainboard) will cause a new   
    MR> IPv6 address. You don't want this to happen for a server.   
      
   For a professional that may be an issue. For a hobby server. Mwah.. it seldom   
   happens and changing the AAAA record is no big deal..   
      
    MR> My IPv6 prefix is valid for up to 6 months, if the DSL connection   
    MR> stays up and running all the time. But it doesn't due to the telco's   
    MR> maintenance windows and maybe some power outage and what have you. So   
    MR> I had to set up DynDNS anyway. It doesn't matter for me if the address   
    MR> changes every 24h or every few weeks/months, it's monitored and DNS   
    MR> will be updated if necessary.   
      
   I wonder what excuse the ISPs have for not simply issuing static IPv6   
   prefixes. Dynamic addresses made sense in the dial up age, when a small poool   
   of adresses could be used for many more users because they never were on line   
   all at once. That chaged with te coming of home routers that usually were left   
   on 24/7 and so occupied an IP address 24/7. They needed one address per   
   customer anyway.   
      
   With IPv6 there never was such an excuse anyway. There is no shortage of   
   addresses and there will not be for the foreseeable future. Why not give   
   everyone a static prefix?   
      
   AFAIK, the Dutch IPSs that offer native IPv6 all issue static prefixes.   
      
      
   Cheers, Michiel   
      
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