Quick Reference Guide

GS108T and GS110TP Smart Switch Software Administration Manual
2-12 Configuring System Information
v1.0, April 2010
Denial of Service
Use the Denial of Service (DoS) page to configure DoS control. The GS108T and GS110TP
software provides support for classifying and blocking specific types of DoS attacks. You can
configure your system to monitor and block six types of attacks:
• SIP=DIP: Source IP address = Destination IP address.
• First Fragment: TCP Header size is smaller than the configured value.
• TCP Fragment: IP Fragment Offset = 1.
• TCP Flag: TCP Flag SYN set and Source Port < 1024 or TCP Control Flags = 0 and TCP
Sequence Number = 0 or TCP Flags FIN, URG, and PSH set and TCP Sequence Number = 0
or TCP Flags SYN and FIN set.
• L4 Port: Source TCP/UDP Port = Destination TCP/UDP Port.
• ICMP: Limiting the size of ICMP Ping packets.
Auto-DoS Configuration
The Auto-DoS Configuration page lets you automatically enable all the DoS features available
on the switch, except for the L4 Port attack. See the previous section for information about the
types of DoS attacks the switch can monitor and block.
To access the Auto-DoS Configuration page, click System  Management  Denial of Service
> Auto-DoS Configuration.
Figure 2-5