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12.27 Security >> Firewall
Figure 129 - Network firewall settings
The user can set whether to enable input through this page, output firewall and set the firewall input and
output rules. Using these settings can prevent malicious network access or restrict internal users’ access to
certain resources of the external network, which can improve security.
A simple firewall module is used for setting firewall rules. This feature supports two types of rules: input rules
and output rules. Each rule is assigned an ordinal number, allowing up to 10 for each rule.
Considering the complexity of firewall settings, the following is an example for illustration.
Table 28 - Network Firewall
Parameter
Description
Enable Input Rules
Indicates that the input rule application is enabled.
Enable Output Rules
Indicates that the output rule application is enabled.
Input/Output
To select whether the currently added rule is an input or output rule.
Deny/Permit
To select whether the current rule configuration is disabled or allowed;
Protocol
There are four types of filtering protocols: TCP | UDP | ICMP | IP.
Src Port Range
Filter port range
Src Address
Source address can be a host address, network address, or all addresses
0.0.0.0; It can also be a network address similar to *.*.*.0, such as:
192.168.1.0.
Dst Address
The destination address can be either the specific IP address or the full
address 0.0.0.0; It can also be a network address similar to *.*.*.0, such as:
192.168.1.0.