How to configure firewall in proxmox?

Good time of day.
I can not understand how to properly configure the firewall in Proxmox.
1)Proxmox Server at hetzner.
On the server I created two bridge:
  • vmbr0 for virtualos with external ip
  • vmbr1 for virtualos with the local ip. are behind a NAT. hear the ip from the dhcp server.(like

There's a dev with a shared folder with ip
2)office with a mikrotik router.
3) Between the office and the server proxmox raised gre tunnel.

When turned off firewall.
From the office ping and the share is available.
Question. How can pingomatic if it is behind a NAT?

If you have enabled firewall policy INPUT DROP
From the office don'T ping shared folder is NOT available.
Question. What is the rule it is necessary to register in the firewall to available from the office network?

I suspect that you have enabled the firewall cut gre traffic.
iptables-I INPUT-p gre -j ACCEPT
not solve the problem.
June 14th 19 at 18:13
0 answer

Find more questions by tags FirewallGREProxmox