REPLY: 2:5005/49 616a8ed5   
   MSGID: 1:266/420 616e4a4a   
   PID: GED+LNX 1.1.5-b20180707   
   CHRS: UTF8 2   
   TZUTC: -0400   
   TID: hpt/lnx 1.9.0-cur 2021-05-15   
   ***NOTE: Reposted;  original message didn't make it to the backbone, feed   
   connection issues; now resolved.   
      
   Hello Victor!   
      
   16 Oct 21 15:35, you wrote to all:   
      
    VS> 2. A /64 on the internal interface of ISP-owned CPE   
      
   If appears that 2 is the closest.   
      
   Xfinity / Comcast of Dover, Delaware (USA)   
      
   I've got a dynamic IPv6 Address on my router WAN side reporting (via a FUGLY   
   web interface):   
       WAN IP Address (IPv6): 2001:558:6027:19:c4e3:1bee:faf8:939d   
       WAN Default Gateway Address (IPv6): fe80::201:5cff:fe80:6846   
       Delegated prefix (IPv6): 2601:48:c500:9340::/64   
      
      
   Interally::   
   Mac worstation [ifconfig en0] [GbE]   
   en0: flags=8863 mtu 1500   
       options=50b   
       ether 14:98:77:33:fb:b5   
       inet6 fe80::14ad:ef4c:c045:132f%en0 prefixlen 64 secured scopeid 0x6   
       inet6 2601:48:c500:9340::c0e3 prefixlen 60 dynamic   
       inet 10.0.0.160 netmask 0xffffff00 broadcast 10.0.0.255   
       nd6 options=201   
       media: autoselect (1000baseT )   
       status: active   
      
      
   Linux 'server' [ifconfig enp2s0] [GbE]   
   enp2s0: flags=4163  mtu 1500   
           inet 10.0.0.219  netmask 255.255.255.0  broadcast 10.0.0.255   
           inet6 2601:48:c500:9340:52e5:49ff:fec3:646a  prefixlen 60  scopeid   
   0x0   
           inet6 fe80::52e5:49ff:fec3:646a  prefixlen 64  scopeid 0x20   
           inet6 2601:48:c500:9340::7da  prefixlen 128  scopeid 0x0   
           ether 50:e5:49:c3:64:6a  txqueuelen 1000  (Ethernet)   
           RX packets 967924  bytes 238763058 (227.7 MiB)   
           RX errors 0  dropped 0  overruns 0  frame 0   
           TX packets 986053  bytes 541541895 (516.4 MiB)   
           TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0   
      
   [netstat -6 -rn]   
       Kernel IPv6 routing table   
       Destination                    Next Hop                   Flag Met Ref    
   Use If   
       ::1/128                        ::                         Un   0   11       
   0 lo   
       2601:48:c500:9340::7da/128     ::                         Un   0   4        
   0 enp2s0   
       2601:48:c500:9340:52e5:49ff:fec3:646a/128 ::              Un   0   4        
   0 enp2s0   
       2601:48:c500:9340::/60         ::                         U    2   3        
   0 enp2s0   
       fe80::52e5:49ff:fec3:646a/128  ::                         Un   0   3        
   0 enp2s0   
       fe80::/64                      ::                         U    256 2        
   0 enp2s0   
       ff00::/8                       ::                         U    256 10       
   0 enp2s0   
       ::/0                           fe80::cc83:d8ff:fea0:bbf7  UG   2   9        
   0 enp2s0   
      
      
   Additionally,  I can ping my router's public IPv6 address from the LAN side,   
   don't know about the WAN side.  I also can make IPv6 connections to sites on   
   the Internet, infact, macOS 11+ default to IPv6 first; and my Linux system has   
   been updated to do the same.   
      
   Cheers,   
   Scott   
      
      
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