I have the same configuration as described here:
https://www.reddit.com/r/Proxmox/comments/1hvrwnc/issues_with_realtek_nic_driver_installation_and/
and I cannot install the network card due to missing kernel headers.
I could not find kernel header files for 6.8.12-4-pve
I also looked at http://download.proxmox.com/debian/pve/dists/bullseye/pve-no-subscription/binary-amd64/
and they are up to pve-headers-6.2_7.4-6_all.deb and then they start again at pve-headers_7.0-2_all.deb...
Read more
https://www.reddit.com/r/Proxmox/comments/1hvrwnc/issues_with_realtek_nic_driver_installation_and/
and I cannot install the network card due to missing kernel headers.
I could not find kernel header files for 6.8.12-4-pve
I also looked at http://download.proxmox.com/debian/pve/dists/bullseye/pve-no-subscription/binary-amd64/
and they are up to pve-headers-6.2_7.4-6_all.deb and then they start again at pve-headers_7.0-2_all.deb...
Read more