Common traffic control and anti-DDoS problems of cisco switch Security

Cisco switch security common traffic control and anti-DDoS problems. Recently, cisco switch security has been favored by many friends. Let's have a deep understanding of cisco switch security solutions today! Traffic control, anti-DDoS, virtual lan vlan, and access control list-based firewall functions.

Traffic Control

The cisco switch's secure traffic control technology limits abnormal traffic flowing through the port to a certain range, so as to prevent the bandwidth of the switch from being abused without limit. The cisco switch's secure traffic control function can control abnormal traffic to avoid network congestion.

Anti-DDoS

Once a company suffers a large-scale distributed denial-of-service attack, it will affect the normal network usage of a large number of users, seriously or even cause network paralysis, and become the biggest headache for service providers. Cisco switch Security uses special technologies to prevent DDoS attacks. It can intelligently detect and block malicious traffic without affecting normal services, so as to prevent the network from being threatened by DDoS attacks.

VLAN

A virtual LAN is an essential security feature of cisco switches. A VLAN can implement a limited broadcast domain on a layer-2 or layer-3 switch. It can divide the network into independent areas and control whether these areas can communicate. A VLAN may span one or more switches.

It is independent of their physical locations, and devices communicate with each other in the same network. VLANs can be formed in various forms, such as ports, MAC addresses, and IP addresses. VLANs Restrict unauthorized access between different VLANs, And you can set the IP/MAC Address binding function to restrict unauthorized network access.

Firewall function based on access control list

Cisco switch Security uses the access control list ACL to implement the cisco switch security function of the packet filtering firewall, enhancing the security protection capability of cisco switches. The access control list was previously used only on the core router. In cisco switch security, the access control filtering measures can be implemented based on the source/Target switch slot, port, source/Target VLAN, source/Target IP address, TCP/UDP port, ICMP type or MAC address.

ACL not only allows network administrators to set network policies, but also allows or denies control over individual users or specific data streams. It can also be used to enhance the security shield of cisco switches on the network, hackers cannot find a specific host on the network to detect the attack.

Intrusion detection IDS

The IDS function of cisco switch security can be used to detect the reported information and data stream content, and perform targeted operations when detecting security events of cisco switches, these actions to respond to the cisco switch security event are sent to the switch, which enables precise port disconnection. To achieve this kind of association, the switch must be able to support functions such as authentication, Port Mirroring, forced stream classification, process count control, and port lookup.