¿proxmox backup blocks certain outbound packages?

Hi.

I have a proxmox server that want to backup to a remote location.

in the remote location I have a bare metal server with proxmox backup installed and runing.

my idea is to use the wireguard client to connect my backup machine to the network where the proxmox server is.

after the fresh install and creating the storage pools decided to configure wireguard and get it running,but for my surprise the client couldn't connect the server.

after a lot of troubleshooting and searching for...

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