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Conceptronic ADSL Router Manual

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Packet Type: Specify the packet type (TCP, UDP, ICMP or any) that the rule will be applied to.
Select TCP if you want to scope for the connection-based application service on the remote server using the port number. Or
select UDP if you want to scope for the connectionless application service on the remote server using the port number.
Log: Choose “Yes” if you want to generate logs when the filer rule is applied to a packet.
Action When Matched: If any packet matches this filter rule, forward or drop this packet.
Source IP Address: Enter the incoming or outgoing packet’s source IP address.
Source IP Mask: Enter the incoming or outgoing packet’s source IP Subnet Mask.
Source Port: Check the TCP or UDP packet’s source port number(s).
Destination IP Address: Enter the incoming or outgoing packet’s destination IP address.
Destination IP Mask: Enter the incoming or outgoing packet’s destination IP Subnet Mask.
Destination Port: Check the TCP or UDP packet’s destination port number(s).
If the DHCP server option is enabled, you have to be very careful in assigning the IP addresses of
filtered private IP range in order to avoid conflicts. Because you do not know which PC in LAN is
assigned to which IP address. The easy way is that the filtered IP address is assigned to the specific
PC that you do not want this PC to access outside resource such as Internet. You configure the filtered
IP address manually to this PC, but it is still in the same subnet with the router.
Block Hacker Attack
The ADSL Router can automatically detect and block the DoS (Denial of Service) attack if user enables this function. This
kind of attack is not to achieve the confidential data of this network; instead, it aims to crush specific equipment or the entire
network. If this happens, the users will not be able to access the network resources. There are eight hacker patterns
implemented in total, including
- IP Spoofing
- Ping of Death (Length > 65535)
- Land Attack (Same source / destination IP address)
- IP with zero length
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