Siemens E-110-I - Manual (Page 64)

SIEMENS ADSL E-110_E-110-I user manual
IP Filter Configuration
The IP filter feature enables you to create rules that control the forwarding of incoming and outgoing data
between your LAN and the Internet. This chapter explains how to create IP filter rules.
Viewing Your IP Filter Configuration
Select Services > IP Filter. The IP Filter Configuration page displays.
Configuring IP Filter Global Settings
The IP Filter Configuration page enables you to configure several global IP Filter settings, and displays a
table showing all existing IP Filter rules. The global settings that you can configure are:
• Security Level: When High is selected, only those rules that are assigned a security value of High will
be in effect. The same is true for the Medium and Low settings. When None is selected, IP Filtering is
disabled.
• Private/Public/DMZ Default Action: This setting specifies a default action to be taken (Accept or
Deny) on private, public, or DMZ-type device interfaces when they receive packets that do not match
any of the filtering rules.
Private – Typically, the global setting for private interfaces is Accept, so that LAN computers have
access to the ADSL Router’s Internet connection.
Public – The interface connects to the Internet. e.g., PPP, EoA, and IPoA interfaces. Typically, the
global setting for public interfaces is Deny, so that all accesses to your LAN initiated from
external computers are denied (discarded at the public interface), except for those allowed by a
specific IP Filter rule.
DMZ – Refers to computers that are available for both public and in-network accesses (such as a
company's public Web server). Packets received on a DMZ interface - a whether from a LAN or
external source - are subject to a set of protections that is in between public and private
interfaces. The global setting for DMZ-type interfaces may be set to Deny so that all attempts to
access these servers are denied by default; the administrator may then configure IP Filter rules to
allow accesses of certain types.
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