ETIC 1230 Uživatelský manuál stáhnout pdf (Strana 74)

CONFIGURATION

Page 74 User guide ref. 9015909-03 Industrial router IPL-E

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Main filter table

The main filter is a table, each line being a rule.

Each rule of the filter is composed a several fields which defines a

particular data flow and another field which is called the action field.

The fields which define the data flow are :

Direction (« WAN to LAN » or « LAN to WAN »),

Protocol (TCP, UDP…),

IP@ & port number, source & destination.

The Action field can take two values

Accept : To authorize the data flow to be forwarded to the router interface.

Drop : To drop the packet which matches the rule.

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How does the main filters works

When the firewall receives a packet, it checks if it matches the first rule..

If it does, the decision is applied to the packet according to the “Action” field.

If it does not, the firewall checks if it matches the second rule; and so on.

If the packet does not match any of the rules of the table, the default policy is applied to

the packet (drop or reject).

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ETIC 1230 Uživatelský manuál Strana 74