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Step 4:
You may add more firewall rules for specific security purposes. Click on the
A
A
d
d
d
d
radio button at the screen shown above, followed by the
E
E
d
d
i
i
t
t button and the
screen on the left will appear.
Rule Name : Enter a unique name to identify this firewall rule.
Disposition
Policy
: This parameter determines whether the packets obeying the rule
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, UDP,
ICMP, IGMP or ALL.
Note: If users select either ICMP or IGMP, they are required to make
further selection in the ICMP Types or IGMP Types respectively.
ICMP Types : This IP protocol is used to report errors in IP packet routing. ICMP
serves as a form of flow control, although ICMP messages are
neither guaranteed to be received or transmitted.