Installation guide

MyPBX U5XX Administrator's Guide
www.yeastar.comPage25
5.2 Firewall Settings
Firewalls are used to prevent unauthorized Internet users from accessing
private networks connected to the Internet, especially intranets. All messages
entering or leaving the intranet pass through the firewall, which examines each
message and blocks those that do not meet the specified security criteria.
5.2.1 Firewall Rules
Figure 5-8 Firewall Settings
1) General Settings
·Enable Firewall
Enable the firewall to protect the device.
·Disable Ping
Enable this item, net ping from remote hosts will be dropped.
·Drop All
When you enable “Drop All” feature, system will drop all packets or connection
from other hosts if there are no other rules defined. To avoid locking the devices,
at least one “TCP” accept common rule must be created for port used for SSH
access, port used for HTTP access and port sued for CGI access.
2) Common Rules
There is no default rule, you can create them as required.