How to make it so that in Proxmox VM (IP first of the subnet) can ping CT?

Question

Ping

I noticed that the first and last VM from the subnet cannot ping the container,
what should I do?
other VMs can, but containers can't

Answer 1

How is the network connected to virtual machines? Through bridge or nat?

Answer 2

the last one is probably the broadcast address, but the first one is the address of the subnet