Security >> Firewall - 2N IP Handset User Manual

11.31 Security >> Firewall
Through this page can set whether to enable the input, output firewall, at the same time
can set the firewall input and output rules, using these Settings can prevent some
malicious network access, or restrict internal users access to some resources of the
external network, improve security.
Firewall rule set is a simple firewall module. 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 to illustrate:
Parameter
Enable Input Rules
Enable Output Rules
Input/Output
Deny/Permit
Protocol
Picture 30 - Network firewall Settings
Table 16 - Network Firewall
Description
Indicates that the input rule application is enabled.
Indicates that the output rule application is enabled.
To select whether the currently added rule is an input or
output rule.
To select whether the current rule configuration is disabled
or allowed;
There are four types of filtering protocols: TCP | UDP |
ICMP | IP.
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