#305 NEEDINFO: Pioneers server not listening on IPv4 on Linux distros

[Kunal Deo]

Pioneers is only listeneing on IPv6. It is not working on IPv4. I have tested this on source and binary builds on Ubuntu 16.04 and Arch Linux. Even trunk exhibits the same behavior. This problem doesnt exist on Windows build.

[Roland Clobus]

My testing platform is Debian Testing. netstat shows only IPv6 for the listening port, but I can still connect with IPv4 (nc -4 localhost 5556)
It seems that I have IP-forwarding turned on:
cat /proc/sys/net/ipv4/ip_forward shows 1
Apparently I changed the setting on my development machine, I'll have to investigate further.

[Kunal Deo]

Even on cloud, I tried on Azure VMs I was not able to make connection from
outside to the service listening on IPv6 port only. Pioneers works fine on
Azure VM when hosted on Windows as it is binding on IPv4. None of the
public cloud providers supports IPv6.

On Tue, May 12, 2020 at 1:01 PM Roland Clobus rclobus@users.sourceforge.net
wrote:

My testing platform is Debian Testing. netstat shows only IPv6 for the
listening port, but I can still connect with IPv4 (nc -4 localhost 5556)
It seems that I have IP-forwarding turned on:
cat /proc/sys/net/ipv4/ip_forward shows 1
Apparently I changed the setting on my development machine, I'll have to
investigate further.

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• [bugs:#305] https://sourceforge.net/p/pio/bugs/305/ Pioneers server
  not listening on IPv4 on Linux distros *

Status: open
Group:
Created: Mon May 11, 2020 08:14 PM UTC by Kunal Deo
Last Updated: Mon May 11, 2020 08:14 PM UTC
Owner: Roland Clobus

Pioneers is only listeneing on IPv6. It is not working on IPv4. I have
tested this on source and binary builds on Ubuntu 16.04 and Arch Linux.
Even trunk exhibits the same behavior. This problem doesnt exist on Windows
build.

---

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--
Kunal Deo

Twitter: http://twitter.com/kunaldeo

[Kunal Deo]

To clarify this further. It seems this issue is only with Azure VMs. Google
Cloud Platform VMs are working fine with only listening on IPv6.

[jdv]

For what it's worth, I've been testing the server on a local machine (Debian buster), EC2 (AWS Linux based on RHEL), and a Docker container (again based on Debian) and the networking works on all of them. This is using the console server.

[Roland Clobus]

Hi,
I would like to help here, but I'm at a loss.
How can I reproduce your test case? I don't have AWS or Azure accounts.
Can you point me to a specific hostname:port where I could try to reproduce/diagnose the issue?

With kind regards,
Roland Clobus

[Roland Clobus]

I'm adding the 'NEEDINFO' marker. If no additional information is provided, this ticket will be closed during the next round of ticket maintenance.