VoIP/(802.11g) ADSL2+ Router
Chapter 4: Configuration
You can find six items under the
Firewall
section:
General Settings, Packet Filter, Intrusion Detection,
URL Filter, IM/P2P Blocking
and
Firewall Log.
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 then add custom filters, you may temporarily disable the
firewall and recover your custom filter settings by re-selecting the same security level.
The “
Block WAN Request
” is a stand-alone function and not relate to whether security enable or
disable. Mostly it is for preventing any scan tools from WAN site by hacker.
Any remote user who is attempting to perform this action may result in
blocking all the accesses to configure and manage of the device from the
Internet.
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