Access guest from guest

[Figa]

Hello,

I have two guests on NAT network, but both have the same IP. I want to full network access from first guest to second guest. Is this possible and how? Thanks for reply.

 

[Alwin]

https://pve.proxmox.com/pve-docs/pve-admin-guide.html#qm_virtual_machines_settings

in the alternative NAT mode, each virtual NIC will only communicate with the Qemu user networking stack, where a builting router and DHCP server can provide network access. This built-in DHCP will serve adresses in the private 10.0.2.0/24 range. The NAT mode is much slower than the bridged mode, and should only be used for testing.

No guest to guest communication. https://www.linux-kvm.org/page/Networking

To have a private network behind a firewall on PVE you are better off with using the PVE firewall.
https://pve.proxmox.com/pve-docs/pve-admin-guide.html#chapter_pve_firewall

 

[Figa]

Thanks, I got it, but I need NAT to access first guest.

 

[Alwin]

If you use the firewall, you can create a private network behind the firewall (you could also use VM as firewall) and access forwarded ports from the outside.