Tp-Link T2600G-28MPS V2 [812/1027] Using the cli

Tp-Link T2600G-28MPS V2 [812/1027] Using the cli
Configuration Guide 781
Configuring Network Security DoS Defend Configuration
Land Attack The attacker sends a specific fake SYN (synchronous) packet to the destination
host. Because both of the source IP address and the destination IP address of
the SYN packet are set to be the IP address of the host, the host will be trapped
in an endless circle of building the initial connection.
Scan SYNFIN The attacker sends the packet with its SYN field and the FIN field set to 1. The
SYN field is used to request initial connection whereas the FIN field is used to
request disconnection. Therefore, the packet of this type is illegal.
Xmascan The attacker sends the illegal packet with its TCP index, FIN, URG and PSH field
set to 1.
NULL Scan The attacker sends the illegal packet with its TCP index and all the control fields
set to 0. During the TCP connection and data transmission, the packets with all
control fields set to 0 are considered illegal.
SYN sPort less
1024
The attacker sends the illegal packet with its TCP SYN field set to 1 and source
port smaller than 1024.
Blat Attack The attacker sends the illegal packet with the same source port and destination
port on Layer 4 and with its URG field set to 1. Similar to the Land Attack, the
system performance of the attacked host is reduced because the Host circularly
attempts to build a connection with the attacker.
Ping Flooding The attacker floods the destination system with Ping packets, creating a
broadcast storm that makes it impossible for the system to respond to legal
communication.
SYN/SYN-ACK
Flooding
The attacker uses a fake IP address to send TCP request packets to the server.
Upon receiving the request packets, the server responds with SYN-ACK packets.
Since the IP address is fake, no response will be returned. The server will keep
on sending SYN-ACK packets. If the attacker sends overflowing fake request
packets, the network resource will be occupied maliciously and the requests of
the legal clients will be denied.
WinNuke Attack Because the Operation System with bugs cannot correctly process the URG
(Urgent Pointer) of TCP packets, the attacker sends this type of packets to the
TCP port139 (NetBIOS) of the host with the Operation System bugs, which will
cause the host with a blue screen.
3) Click Apply.
9.2 Using the CLI
Follow these steps to configure DoS Defend:
Step 1 configure
Enter global configuration mode.
Step 2 ip dos-prevent
Globally enable the DoS defend feature.

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