Hello Konstantin,   
      
   On Tuesday January 09 2018 11:48, you wrote to me:   
      
    KK>>> That's fido IPv6 relay for binkp and ifcico I made just for   
    KK>>> lulz.   
    MvdV>> So this is an IPV6 to IPv4 gateway.   
      
    KK> Actually, it isn't strictly IPv6 to IPv4. IPv6 to IPv6 also works.   
      
   Yes, that works too. I could reach IPv6 only node 280/5006 via   
   2a04:52c0:101:201:f1d0:2:280:5006   
      
    KK> And if destination IPv4 addresses are unresponsive IPv6 addresses also   
    KK> will be tried.   
      
   That does not work. If I diasble listen 0.0.0.0 on my main machine I get   
   "connection refused" when trying to connect to it via your gateway.   
      
    KK>  So it is potentially can be used to reach IPv6-only   
    KK> nodes if direct routing isn't working for some reason.   
      
   Hmmm...   
      
    MvdV>>  IPv6 only nodes can use this to connect to IPv4 only nodes.   
    MvdV>> Wow!.   
      
    KK> Or IPv4 only nodes could use such services to advertise IPv6   
    KK> reachability when don't want to mess with IPv6 tunnels   
      
   "Messing" with a tunnel was an interesting and lerningful experience. And a   
   tunnel is much more flexible, it not only offers BINKP and IFCICO. It can be   
   used for ALL services.   
      
    KK> or their retro-OS doesn't support IPv6 at all.   
      
   Dump it! ;-)   
      
    KK> Or just want a shiny f1d0-style address but can't have one...   
      
   Minor cosmetic issue...   
      
    KK> There are could be numerious hypotetical reasons for such services to   
    KK> exist.   
      
   Perhaps...   
      
   But I think that with the coming of DS_Lite the reverse would be more useful.   
   But harder to implement...   
      
   But then I think I'd prefer to use the services of an agent independant of   
   Fidonet. Such as http://www.feste-ip.net/ They are still a SPOF, but most   
   likely have no interest in acting as a SPOM.   
      
    MvdV>> I do not know what problem this is a solution for, AFAIK there   
    MvdV>> are no truly IPv6 only connections yet. Every end user on the   
    MvdV>> internet still has outgoing IPv4 capability and probably will   
    MvdV>> have that for a very long time to come. But this certainly is   
    MvdV>> an interesting experiment. Tell us more... Write a Fidonews   
    MvdV>> article...   
      
    KK> As I have already said that experiment was just for fun.   
      
   OK. ;-)   
      
    KK> I've tested how recent linux kernels handle thousands of address   
    KK> aliases on interfaces in memory constrained environment. I hadn't   
    KK> intended and still don't intent to provide such service for anyone to   
    KK> use in real life. As it's prone to abuse and centralization.   
      
   Indeed. Experience unfortunately shows that in Fidonet centralisation may lead   
   to manipulation. :-(   
      
    KK> But as my address was noticed and mistaken as potential new IPv6 fido   
    KK> member I clarified that it's not. ^_^   
      
   Good that this is cleared up.   
      
    KK>>> There are two IPv6 prefixes:   
    KK>>>  - "f1d0 style" - 2a04:52c0:101:201:f1d0::/80   
    KK>>>  - "hex style" - 2a04:52c0:101:201:fed0::/80   
      
    MvdV>> I may test that hex option later.   
      
   The hex option works.   
      
      
   Cheers, Michiel   
      
   --- GoldED+/W32-MSVC 1.1.5-b20170303   
    * Origin: he.net certified sage (2:280/5555)