- 1 What is an STP manipulation attack?
- 2 How do you mitigate a STP attack?
- 3 What is STP security?
- 4 How does TCN work in STP?
- 5 What is CDP attack?
- 6 What is PortFast STP?
- 7 What is a VLAN hopping attack?
- 8 What is DHCP spoofing attack?
- 9 What is ARP spoofing?
- 10 What is STP used for?
- 11 What does STP do?
- 12 What is STP state?
- 13 How is RSTP faster than STP?
- 14 What is STP convergence time?
- 15 What is STP and RSTP?
What is an STP manipulation attack?
An STP attack involves an attacker spoofing the root bridge in the topology. The attacker broadcasts out an STP configuration/topology change BPDU in an attempt to force an STP recalculation. The BPDU sent out announces that the attacker’s system has a lower bridge priority.
How do you mitigate a STP attack?
To mitigate Spanning Tree Protocol ( STP ) manipulation attacks, use PortFast and Bridge Protocol Data Unit (BPDU) Guard: PortFast – PortFast immediately brings an interface configured as an access or trunk port to the forwarding state from a blocking state, bypassing the listening and learning states.
What is STP security?
Spanning Tree Protocol ( STP ) is used in networks to prevent Layer 2 loops on the access network. STP may be leveraged by an attacker for a variety of security attacks.
How does TCN work in STP?
When the switches receive this message they will reduce the aging time of the MAC address table from 300 seconds to 15 seconds (this is the forward delay timer). This message is called the TCN (Topology Change Notification).
What is CDP attack?
CDP discovers other Cisco devices that are directly connected, which makes possible to the devices to auto-configure their connection in some cases, simplifying configuration and connectivity. CDP messages are not encrypted.
What is PortFast STP?
PortFast causes a switch or trunk port to enter the spanning tree forwarding state immediately, bypassing the listening and learning states. When you enable PortFast on a switch or trunk port, the port is immediately transitioned to the spanning tree forwarding state.
What is a VLAN hopping attack?
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.
What is DHCP spoofing attack?
DHCP spoofing occurs when an attacker attempts to respond to DHCP requests and trying to list themselves (spoofs) as the default gateway or DNS server, hence, initiating a man in the middle attack.
What is ARP spoofing?
ARP spoofing is a type of attack in which a malicious actor sends falsified ARP (Address Resolution Protocol) messages over a local area network. This results in the linking of an attacker’s MAC address with the IP address of a legitimate computer or server on the network.
What is STP used for?
Spanning Tree Protocol ( STP ) is a Layer 2 protocol that runs on bridges and switches. The specification for STP is IEEE 802.1D. The main purpose of STP is to ensure that you do not create loops when you have redundant paths in your network. Loops are deadly to a network.
What does STP do?
The Spanning Tree Protocol ( STP ) is a network protocol that builds a loop-free logical topology for Ethernet networks. The basic function of STP is to prevent bridge loops and the broadcast radiation that results from them.
What is STP state?
To create a single path between each Ethernet segment, for to and fro communication, STP decides on the state of each Ethernet interface. An interface can only be in two states, Forwarding state or Blocking state. STP employs its algorithm and puts certain interfaces in a Forwarding state.
How is RSTP faster than STP?
The STP process to determine network state transitions is slower than the RSTP process because it is timer-based. RSTP converges faster because it uses a handshake mechanism based on point-to-point links instead of the timer-based process used by STP.
What is STP convergence time?
STP Convergence Times. Convergence time is defined by the total time it takes to transition from either, Listening to Forwarding or Blocking to Forwarding. We can think about this as Convergence Time, (Listening to Forwarding transition) and Re- Convergence Time (Blocking to Forwarding transition).
What is STP and RSTP?
Spanning tree protocol ( STP ) (IEEE 802.1D) is predominantly used to prevent layer 2 loops and broadcast storms and is also used for network redundancy. STP evolved into rapid spanning tree protocol ( RSTP ) (802.1w), which offers several improvements over STP (802.1D).