No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search


To have a better experience, please upgrade your IE browser.


Configuration Guide - Security

CloudEngine 8800, 7800, 6800, and 5800 V200R005C10

This document describes the configurations of Security, including ACL, local attack defense, MFF, attack defense, traffic suppression and storm control, ARP security, Port security, DHCP snooping, ND snooping, PPPoE+, IPSG, SAVI, separating the management plane from the service plane, security risks.
Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Overview of URPF

Overview of URPF

A Denial of Service (DoS) attack disables users from connecting to the server. DoS attacks aim to occupy excess resources by sending a large number of connection requests. As a result, authorized users cannot receive responses from the server.

Unicast Reverse Path Forwarding (URPF) check enables the device to check the source Internet Protocol (IP) address in the Forwarding Information Base (FIB) table against the inbound interface of the packet. If the source IP address does not match the inbound interface of the packet, the packet is discarded. This prevents IP spoofing attacks, especially DoS attacks with bogus source IP address.

Figure 15-1 URPF networking

As shown in Figure 15-1, a bogus packet with source IP address is sent from SwitchA to SwitchB. After receiving the bogus packet, SwitchB sends a response packet to the actual destination device SwitchC at SwitchB and SwitchC are attacked by the bogus packets.

If URPF strict check is enabled on SwitchB, when SwitchB receives the bogus packet with source IP address, URPF discards the packet because the inbound interface of the source IP address is not the interface that receives the packet.

Updated: 2019-04-20

Document ID: EDOC1100074765

Views: 27651

Downloads: 96

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Previous Next