Atlantis Land WEBSHARE 3G 244WN - Manual (Page 83)

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computers or applications accessing your local network from
the Internet.
o
Intrusion Detection: Enable Intrusion Detection to detect,
prevent and log malicious attacks.
2. Access Control: Prevents access from PCs on your local network:
o
Firewall Security and Policy (General Settings):
Outbound direction of Packet Filter rules to prevent
unauthorized computers or applications accessing the Internet.
o
URL Filter: To block PCs on your local network from unwanted
websites.
7.4.1 General Settings
You can choose not to enable Firewall and still able to access to URL Filter and IM/P2P
Blocking or enable the Firewall using preset filter rules and modify the port filter rules
as required. The Packet Filter is used to filter packets based-on Applications (Port) or
IP addresses.
There are four options when you enable the Firewall, they are:
• All blocked/User-defined: no pre-defined port or address filter rules by
default, meaning that all inbound (Internet to LAN) and outbound (LAN to
Internet) packets will be blocked. Users have to add their own filter rules
for further access to the Internet.
• High/Medium/Low security level: the predefined port filter rules for
High, Medium and Low security are displayed in Port Filters of Packet
Filter.
Select either High, Medium or Low security level to enable the Firewall. The only
difference between these three security levels is the preset port filter rules in the
Packet Filter. Firewall functionality is the same for all levels; it is only the list of preset
port filters that changes between each setting. For more detailed on level of preset
port filter information, refer to Table 1: Predefined Port Filter.
If you choose of the preset security levels and add custom filters, this level of filter
rules will be saved even and do not need to re-configure the rules again if you disable
or switch to other firewall level.