NB3000-Line-Hd User Manual 4.2
5.5.3. Rules
In general, the firewall is set up of a range of rules which control each packet’s permission
to pass the router. Please note that the rules are processed by order, that means traversing
the list from top to bottom until a matching rule is found. Packets which are not matching
any of the rules configured will be ALLOWED.
Figure 5.25.: Firewall Rules
Parameter
Firewall Rule Configuration
Description
A meaningful description about the purpose of this rule
Action
Specifies whether the packets of this rule should be allowed or
denied
log matches
Throw a syslog message if rule matches
Source
The source address of matching packets, can be any or speci-
fied by address/network. Selecting on source MAC addreses is
possible as well.
Destination
The destination address of matching packets, can be any, local
(addressed to the system itself) or specified by address/net-
work
Incoming interface
The interface on which matching packets are received
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