PLANET XGS3-24040 - Manual (Page 491)

Chapter 50 Security Feature Configuration
50-1
Chapter 50 Security Feature Configuration
50.1 Introduction to Security Feature
Before introducing the security features, we here first introduce the DoS. The DoS is short for Denial of
Service, which is a simple but effective destructive attack on the internet. The server under DoS attack will
drop normal user data packet due to non-stop processing the attacker’s data packet, leading to the denial of
the service and worse can lead to leak of sensitive data of the server.
Security feature refers to applications such as protocol check which is for protecting the server from attacks
such as DoS. The protocol check allows the user to drop matched packets based on specified conditions. The
security features provide several simple and effective protections against Dos attacks while acting no
influence on the linear forwarding performance of the switch.
50.2 Security Feature Configuration
50.2.1 Prevent IP Spoofing Function Configuration Task
Sequence
1．Enable the IP spoofing function.
Command Explanation
Global Mode
[no] dosattack-check srcip-equal-dstip
enable
Enable/disable the function of checking if the
IP source address is the same as the
destination address.
50.2.2 Prevent TCP Unauthorized Label Attack Function
Configuration Task Sequence
1．Enable the anti TCP unauthorized label attack function
2．Enable Checking IPv4 fragment function
Command Explanation
Global Mode
[no] dosattack-check tcp-flags enable Enable/disable checking TCP label function