User`s guide

MBR L13 – User’s Guide
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3.7.1.10 Advanced Filtering
Advanced filtering is designed to allow comprehensive control over the firewall's behavior. You can define specific
input and output rules, control the order of logically similar sets of rules, and make a distinction between rules that
apply to WAN and LAN devices.
To view the L13 advanced filtering options, click the Advanced Filtering link of the Firewall menu item under the
Services tab. The Advanced Filtering screen appears.
Figure 78: Advanced Filtering
3.7.1.10.1 Input and Output Rule Sets
The first two sections of the Advanced Filtering screen—'Input Rule Sets' and ‘Output Rule Sets', are designed for
configuring inbound and outbound traffic respectively. Each section is comprised of subsets which can be grouped
into three main subjects:
 Initial rules – rules defined here will be applied first, on all gateway devices
 Network device rules – rules can be defined for each gateway device
 Final rules – rules defined here will be applied last, on all gateway devices
The order of the rules appearance represents both the order in which they were defined and the sequence by which
they will be applied. You may change this order after your rules are defined (without having to delete and then re-add
them), by using the and action icons.
Figure 79: Move Up and Move Down Action Icons
There are numerous rules that are automatically inserted by the firewall in order to provide improved security and
block harmful attacks.
 To an advanced filtering rule:
1. Choose the traffic direction and the device on which to set the rule.
2. Click the appropriate New Entry link. The Add Advanced Filter screen appears.