Hi Andy,
On 17 Nov 2020, at 18:06, Andy Smith
<andy(a)bitfolk.com> wrote:
Are you saying that when you tcpdump on one host looking for port
4789 traffic (TCP? UDP?), you do not see anything when you think you
should?
Yes, exactly. I’m following the guide here:
https://docs.docker.com/network/network-tutorial-overlay/
<https://docs.docker.com/network/network-tutorial-overlay/> for standalone
containers on different hosts. Everything is working fine until I try to ping one
container from the other — or indeed try any form of network connectivity. Traffic is
going back and forth correctly on ports 2377 and 7946 but tcpdump shows that neither host
is initiating traffic on port 4789 (UDP). Firewalls are disabled on both hosts, so that’s
not an issue. Networking is fundamentally working on both containers — that is they can
see the internet and other containers.
Regards,
Chris
—
Chris Smith <space.dandy(a)icloud.com>