Rule deny source什麼意思

"Rule deny source" is a term used in network security, particularly in the context of firewalls and access control. It refers to a rule or a set of rules that deny (or block) incoming or outgoing traffic from a specific source (IP address, network, etc.).

In a firewall or a network security system, rules are set up to allow or deny traffic based on various criteria such as the source and destination IP addresses, ports, protocols, and other attributes of the network traffic. A "deny source" rule is a type of access control rule that is applied when a packet does not match any of the allow rules.

For example, if a firewall has an "allow" rule that permits traffic from a specific source IP range to a destination server, and a "deny source" rule that blocks all other sources, then any traffic that does not originate from the allowed IP range will be denied by the firewall.

"Rule deny source" can also be used in the context of application security, where access to certain resources or functions within an application is denied to specific sources or users. In this context, the "source" could refer to the user's IP address, device, or other attributes that identify the source of the request.