Mastering Proxmox - Third Edition

Rules

Rules are the heart of a Proxmox firewall configuration. Rules define the flow and type of traffic that will be allowed or denied in the zones. There are two directions in which network traffic can flow:

• in: This refers to traffic inbound from anywhere to any zones except when specific IP addresses or ports are mentioned
• out: This refers to traffic outbound from any zones to anywhere except when specific IP addresses or ports are mentioned

There are three types of action that a firewall rule can be applied to:

• ACCEPT: This allows traffic packets matching the constraints in the rule
• REJECT: Packets are rejected, and then an acknowledgment of the rejection is sent to the sender
• DENY: Drops traffic packets matching the constraints in ...