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A VLAN access control list (VACL) provides access control for all packets that are bridged within a VLAN or that are routed into or out of a VLAN. Unlike regular Cisco IOS access control lists that are configured on router interfaces and applied on routed packets only, VACLs apply to all packets.
IEEE 802.1Q, often referred to as Dot1q, is the networking standard that supports virtual local area networking (VLANs) on an IEEE 802.3 Ethernet network. The standard defines a system of VLAN tagging for Ethernet frames and the accompanying procedures to be used by bridges and switches in handling such frames.
VLANs allow network administrators to group hosts together even if the hosts are not directly connected to the same network switch. Because VLAN membership can be configured through software, this can greatly simplify network design and deployment.
Reverse-path forwarding (RPF) is a technique used in modern routers for the purposes of ensuring loop-free forwarding of multicast packets in multicast routing and to help prevent IP address spoofing in unicast routing.
pfSense is a firewall/router computer software distribution based on FreeBSD. The open source pfSense Community Edition (CE) and pfSense Plus is installed on a physical computer or a virtual machine to make a dedicated firewall/router for a network. [ 3 ]
This port communicates with P-Ports and ports on the same community VLAN. Example scenario: a switch with VLAN 100, converted into a Private VLAN with one P-Port, two I-Ports in Isolated VLAN 101 (Secondary) and two community VLANs 102 and 103 (Secondary), with 2 ports in each. The switch has one uplink port (trunk), connected to another switch.
Port forwarding via NAT router. In computer networking, port forwarding or port mapping is an application of network address translation (NAT) that redirects a communication request from one address and port number combination to another while the packets are traversing a network gateway, such as a router or firewall.
Simply do not put any hosts on VLAN 1 (the default VLAN). i.e., assign an access VLAN other than VLAN 1 to every access port Switch (config-if)# switchport access vlan 2; Change the native VLAN on all trunk ports to an unused VLAN ID. Switch (config-if)# switchport trunk native vlan 999; Explicit tagging of the native VLAN on all trunk ports.