ZyXEL 202H 91-003-194001B User Manual
Product codes
91-003-194001B
P-202H Plus v2 User’s Guide
95
Chapter 9 Firewall Configuration
9.5.3.3 Source Address
What is the connection’s source address; is it on the LAN or WAN? Is it a single IP, a range of
IPs or a subnet?
IPs or a subnet?
9.5.3.4 Destination Address
What is the connection’s destination address; is it on the LAN or WAN? Is it a single IP, a
range of IPs or a subnet?
range of IPs or a subnet?
9.6 Connection Direction
This section describes examples for firewall rules for connections going from LAN to WAN
and from WAN to LAN.
and from WAN to LAN.
9.6.1 LAN to WAN Rules
The default rule for LAN to WAN traffic is that all users on the LAN are allowed non-
restricted access to the WAN. When you configure a LAN to WAN rule, you in essence want
to limit some or all users from accessing certain services on the WAN. WAN to LAN Rules
restricted access to the WAN. When you configure a LAN to WAN rule, you in essence want
to limit some or all users from accessing certain services on the WAN. WAN to LAN Rules
9.6.2 WAN to LAN Rules
The default rule for WAN to LAN traffic blocks all incoming connections (WAN to LAN). If
you wish to allow certain WAN users to have access to your LAN, you will need to create
custom rules to allow it.
you wish to allow certain WAN users to have access to your LAN, you will need to create
custom rules to allow it.
9.7 Firewall Rules Summary
Note: The fields in the Rule Summary screens are the same for Local Network to
Internet Set and Internet to Local Network Set, so the discussion below
refers to both.
refers to both.
Click on Firewall, then Rule Summary to bring up the following screen. This screen is a
summary of the existing rules. Note the order in which the rules are listed.
summary of the existing rules. Note the order in which the rules are listed.
Note: The ordering of your rules is very important as rules are applied in turn.