How Does Vlan Hopping Cause A Vulnerability In The Network?

VLAN hopping is a vulnerability that can be leveraged by an attacker to gain access to networked resources on another virtual LAN (VLAN) that would normally not be accessible. Two methods of exploiting this vulnerability are switch spoofing and double tagging.

What makes a switch vulnerable to a VLAN hopping attack?

which feature on a switch makes it vulnerable to VLAN hopping attacks? VLAN hopping is a vulnerability that can be leveraged by an attacker to gain access to networked resources on another virtual LAN (VLAN) that would normally not be accessible. Two methods of exploiting this vulnerability are switch spoofing and double tagging.

Why do I need a router for VLAN hopping?

Any packets sent between VLANs must go through a router or other layer 3 devices. Security is one of the many reasons network administrators configure VLANs. However, with an exploit known as 'VLAN Hopping', an attacker is able to bypass these security implementations. Learn more about network segmentation and VLANs here.

How does a VLAN double tagging attack work?

1. The attacker is connected to a switch port in VLAN 10 and uses a program to modify the packet he wants to send to a PC in VLAN 40. Two VLAN IDs now appear in the frame. VLAN 10 and VLAN 40. 2. The switch receives the frame and recognizes that this packet is coming from a device of VLAN 10. All packets of VLAN 10 (Native VLAN) are not tagged.

How to prevent a switched spoofing attack on VLAN?

To prevent a Switched Spoofing attack, there are a few steps you should take: Do not configure any access points with either of the following modes: "dynamic desirable", "dynamic auto", or "trunk". Manually configure access ports and disable DTP on all access ports.

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