Subj : Connection Tests
To   : Michiel van der Vlist
From : Rob Swindell
Date : Mon Apr 03 2023 01:47 am

  Re: Connection Tests
  By: Michiel van der Vlist to Rob Swindell on Sun Apr 02 2023 10:36 pm

 >
 > *** Answering a msg posted in area FIDOTEST (FIDOTEST).
 >
 > Hello Rob,
 >
 > On Sunday April 02 2023 12:43, you wrote to me:
 >
 >  >> I see you took the easy way out. You removed the AAAA record from
 >  >> the DNS.
 >
 >  RS> For now. No point advertising an incorrect address.
 >
 > Indeed. For the BBS it may even annoy the users. With the IPv6 address in
 > place a user that is running an IPv6 capable terminal program may have to
 > wait a minute or so for his software to realize that IPv6 is not working and
 > fall back to IPv4.
 >
 >  >> Perhaps you should come to the IPv6 echo. That is where the
 >  >> expertise is...
 >
 >  RS> Will do.
 >
 > So... here I am...

So my ISP (Spectrum, aka Comcast Business) enabled IPv6 for me recently (after many years of service and unanswered inquiries from me about IPv6 support) without any notice or explanation. I have 5 static IPv4 addresses (a so-called "5 pack"), but I have no idea if I also have static IPv6 addresses or what they are.

For my public network interface on my Windows box (vert.synchro.net), ipconfig reports:

Ethernet adapter Internet:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Intel(R) 82574L Gigabit Network Connection #2
   Physical Address. . . . . . . . . : 00-25-90-85-ED-7D
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   IPv6 Address. . . . . . . . . . . : 2600:6c88:8c40:5b::f5a(Preferred)
   Lease Obtained. . . . . . . . . . : Sunday, April 02, 2023 10:35:32 PM
   Lease Expires . . . . . . . . . . : Sunday, April 09, 2023 10:35:23 PM
   IPv6 Address. . . . . . . . . . . : 2600:6c88:8c40:5b:7d15:cb62:16c5:350c(Preferred)
   Temporary IPv6 Address. . . . . . : 2600:6c88:8c40:5b:c89:48b4:f442:1e7b(Deprecated)
   Temporary IPv6 Address. . . . . . : 2600:6c88:8c40:5b:4964:18d3:2b0d:df6d(Preferred)
   Link-local IPv6 Address . . . . . : fe80::9ec:7a2:d500:1bf8%19(Preferred)
   IPv4 Address. . . . . . . . . . . : 71.95.196.34(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.248
   Default Gateway . . . . . . . . . : fe80::eaad:a6ff:fe58:de1a%19
                                       71.95.196.33
   DHCPv6 IAID . . . . . . . . . . . : 67118480
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-26-F4-0D-4C-00-25-90-85-ED-7D
   DNS Servers . . . . . . . . . . . : 2607:f428:ffff:ffff::1
                                       2607:f428:ffff:ffff::2
                                       192.168.1.2
                                       1.1.1.1
                                       2607:f428:ffff:ffff::1
                                       2607:f428:ffff:ffff::2
   NetBIOS over Tcpip. . . . . . . . : Disabled

When I connect out to an Internet site (e.g. whatismyipaddress.com), it says I'm connecting from 2600:6c88:8c40:5b:915d:3a98:8ac1:7886, but I'm pretty sure that address changes.

For my public network interface on my Debian Linux box (cvs.synchro.net), 'ip a' reports:

2: enp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group de                                                   fault qlen 1000
    link/ether 00:10:18:2a:1a:b6 brd ff:ff:ff:ff:ff:ff
    inet 71.95.196.35/29 brd 71.95.196.39 scope global enp1s0
       valid_lft forever preferred_lft forever
    inet 71.95.196.36/29 brd 71.95.196.39 scope global secondary enp1s0
       valid_lft forever preferred_lft forever
    inet 71.95.196.37/29 brd 71.95.196.39 scope global secondary enp1s0
       valid_lft forever preferred_lft forever
    inet6 2600:6c88:8c40:5b:210:18ff:fe2a:1ab6/64 scope global dynamic mngtmpadd                                                   r noprefixroute
       valid_lft 604780sec preferred_lft 604780sec
    inet6 fe80::210:18ff:fe2a:1ab6/64 scope link
       valid_lft forever preferred_lft forever

My ISP provided router appears to be a Sagemcom, but I don't know much more about it (I use my own wireless access points and routers for DHCP/NAT/Firewall for the other devices on my internal/private networks). The ISP router (the Sagemcom) web UI reports that the vert.synchro.net system has IPv6 address 2600:6c88:8c40:5b::f5a, but when I attempt to connect to that IPv6 address or the ::7886 address (or even just ping6 them) from a remote host, I don't have any success.

Still a bit mysterious to me with so many addresses and so little information from the ISP. Any tips are welcome,
-- 
                                            digital man (rob)

Sling Blade quote #8:
Karl Childers: I don't reckon I got no reason to kill nobody.
Norco, CA WX: 51.0øF, 92.0% humidity, 0 mph WSW wind, 0.00 inches rain/24hrs

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