So, I was having some trouble with Proxmox 9 and routing IPv6 addresses so for now I just followed this post and disabled IPv6 on my Proxmox server. This particular server is the one I use to generate cloud images. So, it was impacting my latest cloud image load attempts. Also, I have only done this on this one server and I hope it is temporary. I just do not have time to figure out why it is not properly routing IPv6.

Anyway below is the procedure:

Disable IPv6

Have to log into the terminal as root user.

nano /etc/sysctl.d/disable-ipv6.conf

Add this line to the file

net.ipv6.conf.all.disable_ipv6 = 1

Once that is done run this:

sysctl --system

This should be it and for me now when I ping google.com it only pings back with IPv4 address.