centurylink Ipv6 modem C2000T SSH

[pixelpadre]

So this morning I was messing around with my c2000T router. It had been set to disable ipv6. I decided it is time to try and get ipv6 going in the house. So I enabled it. Cool, firefox is working well. sights are coming up. Then I went to FZ and tried to login to my server like I do everyday and zero. The server address is ip4. That startled me a bit, then I thought "whats changed?". I remembered that I had changed my router to ipv6. So I went back and disabled ipv6 on the router and I was able to get back to my server no problem. To me, that doesnt make sense. SSH

[boco]

That doesn't make sense at all, unless you enabled IPv6 Only. These days, the best way to connect is Dual Stack, with a fully working public IPv4 and IPv6.

Btw, even with dual stack, if either you or the server have a dysfunctional IPv6 connection (in the sense that you have IPv6, but it doesn't work right due to a ghost route or blocked Path MTU), the server could be unreachable over IPv6.
FileZilla will, after a timeout, try other IPs associated with the server URL.