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Is VLAN good for security?
Compared to LANs, VLANs have the advantage of reducing network traffic and collisions, as well as being more cost effective. Moreover, a VLAN can also bring added security. When devices are separated into multiple VLANs—often by department—it’s easier to prevent a compromised computer from infecting the entire network.
What are VLAN attacks?
VLAN hopping (virtual local area network hopping) is a method of attacking a network by sending packets to a port that is not normally accessible from a given end system. The target switch then sends the frame along to the victim port.
How are VLANs and security affect your network?
VLANs and Security ¶ 1 Segregating Trust Zones ¶. Because of the possibility of misconfiguration, networks of considerably different trust levels should be on separate physical switches. 2 Using the default VLAN1 ¶. 3 Using a trunk port’s default VLAN ¶. 4 Limiting access to trunk ports ¶. 5 Other Issues with Switches ¶.
Do You need A native VLAN for Trunk ports?
1 Answer 1. You can and most likely will need to use a native VLAN on your trunk ports, at least on Cisco switches, other vendors do it differently. But what you have to remember that the security risk is more to do with VLAN 1 (default VLAN) being set as a native VLAN.
Is it possible to misconfigure a VLAN in a switch?
VLANs are not inherently insecure, but misconfiguration can leave a network vulnerable. There have also been past security problems in switch vendor implementations of VLANs. Because of the possibility of misconfiguration, networks of considerably different trust levels should be on separate physical switches.
Can a VLAN be used for all internal networks?
For example, while the same switch could technically be used with VLANs for all internal networks as well as the network outside the firewalls, that should be avoided as a simple misconfiguration of the switch could lead to unfiltered Internet traffic entering the internal network.