18 Nov
2020
18 Nov
'20
9:15 a.m.
Hi Andy,
On 18 Nov 2020, at 05:35, Andy Smith
<andy(a)bitfolk.com> wrote:
I am not seeing a problem sending data on udp/4789 between VMs on
different hosts:
[…]
connect to [85.119.80.223] from authns0.bitfolk.com
[85.119.80.198] 54925
hello world
Thanks, I think I’ve narrowed this down now. For some reason Docker is having trouble
sending port 4789 (and only that port) traffic using IPv6. When I force Docker to use
IPv4 then it works as expected. I repeated your test using nc with IPv6 and there is no
host-to-host issue here. Very strange, but it seems that it’s nothing at all to do with
the VPS.
Regards,
Chris