ZyXEL Communications LTE5121, Руководство пользователя

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Chapter 12 Firewall
LTE-5121 User’s Guide
127
Figure 85
Security > Firewall > General
The following table describes the labels in this screen.
12.3 The Services Screen
Use this screen to view the configured service list. To access this screen, click Security > Firewall
> Services. You have to configure at least one service in this screen before configuring the
Security > Firewall > Access Control > Add New ACL Rule/Edit screen.
Note: These rules specify which computers on the LAN can access which computers or
services on the WAN.
Figure 86
Security > Firewall > Services
Table 46
Security > Firewall > General
LABEL DESCRIPTION
Firewall Select Enable to activate the firewall. The LTE Device performs access control
and protects against Denial of Service (DoS) attacks when the firewall is
activated.
Easy, Medium,
High Select Easy to have the firewall allow both LAN-to-WAN and WAN-to-LAN traffic
to flow through the LTE Device.
Select Medium to have the firewall only allow traffic sent from the LAN to the
WAN. All access and traffic originating from the WAN will be blocked.
Select High to have the firewall only allow Telnet, FTP, HTTP, HTTPS, DNS, POP3,
and SMTP traffic sent from the LAN to the WAN. Other traffic will be blocked.
Apply Click Apply to save your changes.
Cancel Click Cancel to restore your previously saved settings.