Example #2: Viewing the DoS Configuration Information

 

console#show

dos-control

 

SIPDIP Mode

Enable

First Fragment Mode

Enable

Min TCP Hdr Size

20

TCP Fragment

Mode

Enable

TCP Flag Mode

..................................

Disable

L4 Port Mode

Enable

ICMP Mode

Enable

Max ICMP Pkt

Size

512

DHCP Snooping

Dynamic Host Configuration Protocol (DHCP) Snooping is a security feature that monitors DHCP messages between a DHCP client and DHCP server to:

Filter harmful DHCP messages

Build a bindings database of (MAC address, IP address, VLAN ID, port) authorized tuples. DHCP snooping is disabled globally and on all VLANs by default. Ports are untrusted by default.

Network administrators can enable DHCP snooping globally and on specific VLANs. They can also configure ports within the VLAN to be trusted or untrusted. DHCP servers must be reached through trusted ports.

DHCP snooping enforces the following security rules:

DHCP packets from a DHCP server (DHCPOFFER, DHCPACK, DHCPNAK, DHCPRELEASEQUERY) are dropped if received on an untrusted port.

DHCPRELEASE and DHCPDECLINE messages are dropped if for a MAC addresses in the snooping database, but the binding's interface is other than the interface where the message was received.

On untrusted interfaces, the switch drops DHCP packets with a source MAC address that does not match the client hardware address. This is a configurable option.

Dynamic ARP Inspection uses the DHCP snooping bindings database to validate ARP packets.

To prevent DHCP packets being used as a DoS attack when DHCP snooping is enabled, the snooping application enforces a rate limit for DHCP packets received on interfaces. DHCP snooping monitors the receive rate on each interface separately. If the receive rate exceeds a configurable limit, DHCP snooping brings down the interface. The user must do “no shutdown” on this interface to further work with that port. The user can configure both the rate and the burst interval.

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Switching Configuration

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Dell 6200 SERIES manual Dhcp Snooping, Example #2 Viewing the DoS Configuration Information

6200 SERIES specifications

The Dell 6200 Series is a notable line of workstations designed for professionals seeking powerful computing solutions in fields such as engineering, architecture, and design. With its robust architecture and advanced technology, this series stands out for its ability to handle demanding applications while offering reliability and performance.

One of the key features of the Dell 6200 Series is its powerful processing capabilities. It typically includes Intel Xeon processors, which provide multiple cores to manage multitasking efficiently. This allows users to run complex simulations or render high-resolution graphics without experiencing lag or slowdown. The processors are designed for optimal thermal management, allowing for sustained performance during extended work sessions.

Another significant aspect of the Dell 6200 Series is its graphics capabilities. These workstations often come equipped with NVIDIA or AMD professional-grade graphics cards, ensuring that they are equipped to handle graphically intensive tasks, such as 3D modeling and video editing. The support for advanced rendering technologies allows professionals to work with high-fidelity visuals and complex datasets with ease.

In terms of expandability, the Dell 6200 Series is designed with flexibility in mind. Users can customize their workstations with a range of configurations, including varied RAM capacities and storage options. This flexibility ensures that the workstation can be tailored to meet the specific requirements of different workloads. The incorporation of Solid State Drives (SSDs) enhances data access speeds, significantly improving boot times and overall system responsiveness.

Additionally, the Dell 6200 Series includes comprehensive connectivity options to facilitate integration with various peripherals and networks. With multiple USB ports, Ethernet ports, and support for multiple display outputs, users can connect to external devices easily, promoting an efficient workflow.

Security features are also a priority in this series. The workstations typically include advanced security measures, such as TPM (Trusted Platform Module) technology, which helps protect sensitive data through hardware encryption and secure storage.

Overall, the Dell 6200 Series delivers a blend of power, flexibility, and security that makes it an excellent choice for professionals in need of a dependable workstation. With its advanced technologies and ample expansion options, users can feel confident that their equipment can handle both current and future demands, making it a smart investment for any professional environment.