WM Systems M2M Router NB, Руководство пользователя

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At the Zones part you can a new rule to the current ones. You also can or
an existed rule.
When you are attmepted to add a new firewall rule, it must be performed very carefully, because
you can disable or tilt ports communication which are used by the router or some network services
by general (e.g. Port nr. 67 is necessary for the DHCP service and 80 port for the, etc).
When you have modified the settings, save them by the Save & Apply button.
At the
Advanced Settings tab you can limit the incoming, outgoing, and forwarded traffic for each
subnets.
When you have modified the settings, save them by the Save & Apply button.