You may add more firewall rules for specific security purposes. Click on the Add radio button at the screen shown above, followed by the Edit button.
Rule | : Enter a unique name to identify this firewall rule. |
Name |
|
Disposition : This parameter determines whether the packets obeying the rule
Policy | should be accepted or denied by the firewall. Choose between |
| Accept and Deny. |
Protocols : Users are allowed to select the type of data packet from: TCP,
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| UDP, ICMP, IGMP or ALL. | ||
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| Note: If users select either ICMP or IGMP, they are required to | ||
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| make further | selection in the ICMP Types or IGMP Types | |
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| respectively. |
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|
ICMP | : This IP protocol is used to report errors in IP packet routing. ICMP | |||
Types |
| serves as a form of flow control, although ICMP messages are | ||
|
| neither guaranteed to be received or transmitted. | ||
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| ICMP | Description | |
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| Packet Type |
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|
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| Echo | Determines whether an IP |
|
|
| request | node (a host or a router) is |
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|
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| available on the network. |
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| Echo reply | Replies to an ICMP echo |
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|
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| request. |
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