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DSL-522T ADSL Router User Guide
Firewall
Firewall
Configura
tion window
When DoS, Port Scan, or Service Filtering Protection is enabled, it will create a firewall policy to protect your
network against the following:
Dos Protection Port Scan Protection Service Filtering
SYN Flood check
ICMP Redirection check
FIN/URG/PSH attack
Xmas Tree Scan
Null Scan attack
SYN/RST attack
SYN/FIN Scan
Ping from WAN
Telnet from WAN
FTP from WAN
DNS from WAN
IKE from WAN
RIP from WAN
DHCP from WAN
ICMP from LAN
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The Firewall Configuration window allows
the Router to enforce specific predefined
policies intended to protect against certain
common types of attacks. There are two
general types of protection (DoS, Port Scan)
that can be enabled on the Router, as well
as filtering for specific packet types
sometimes used by hackers.
You can choose to enable or disable
protection against a customized basket of
attack and scan types. To use DoS
Protection or Port Scan Protection, select
the State Enabled radio button for the
protection type and click in the selection
boxes for the various types of protection
listed under each.
Note
Service Filtering may
interfere with other
configurations such as
DHCP Relay or
Remote Management
via Telnet.
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