To increase protection the rule set is changed as follows: Firewall rule Directi
ID: 3866413 • Letter: T
Question
To increase protection the rule set is changed as follows:
Firewall rule
Direction
Source addr
Dest addr
Src Port
Dest port
Protocol
Action
A
In
external
internal
>1023
25
TCP
permit
B
Out
Internal
external
25
*
TCP
permit
C
Out
Internal
external
>1023
25
TCP
permit
D
In
External
internal
25
*
TCP
permit
E
Either
*
*
Any
*
*
deny
Describe the changes.
Firewall rule
Direction
Source addr
Dest addr
Src Port
Dest port
Protocol
Action
A
In
external
internal
>1023
25
TCP
permit
B
Out
Internal
external
25
*
TCP
permit
C
Out
Internal
external
>1023
25
TCP
permit
D
In
External
internal
25
*
TCP
permit
E
Either
*
*
Any
*
*
deny
Explanation / Answer
Rule A : Allows the packet through the filter to server , generates from External network to internal network
Rule B : Allows the packet through the filter from user ,generates from internal network to external network
Rule C : Allows the packet through the filter from server , generates from internal network to external network
Rule D : Allows the packet through the filter to user, generates from External network to internal network
Rule E : Don't let packet to either of server or user network.
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