CIS425 Unit 1 Research Assignment Part 2 The following rule set was printed out
ID: 3622668 • Letter: C
Question
CIS425 Unit 1 Research Assignment
Part 2
The following rule set was printed out from a firewall.
(2)What is the net result of the firewall rule set (ie. What traffic is being allowed and what is not)?
Rule
Number
Protocol
Source Address
Source
Port
Destination Address
Destination
Port
Direction
Action
1
TCP
Internal
>1023
External
80
Outbound
allow
2
TCP
Internal
>1023
External
443
Outbound
allow
3
All
All
All
All
All
All
Deny
4
TCP
Internal
>1023
External
21
Outbound
allow
5
TCP
Internal
>1023
External
20
Outbound
allow
Rule
Number
Protocol
Source Address
Source
Port
Destination Address
Destination
Port
Direction
Action
1
TCP
Internal
>1023
External
80
Outbound
allow
2
TCP
Internal
>1023
External
443
Outbound
allow
3
All
All
All
All
All
All
Deny
4
TCP
Internal
>1023
External
21
Outbound
allow
5
TCP
Internal
>1023
External
20
Outbound
allow
Explanation / Answer
Dear,
same rule set for two fire walls
Rule set:
Rule 1 allows return packets from established connections to return to the source systems (note that if the boundary router was a hybrid stateful firewall)
Rule 2 permits inbound connections to the main firewalls
Rule 3 It denies all other inbound connections to the main firewall (or any other systems possibly located on the external DMZ).
Rule4 will allow and tell the router to pass SMTP and HTTP traffic to the main firewall, which will send the traffic to the respective application proxies.
Rule5 to will allow and tell the router to pass SMTP and HTTP traffic to the main firewall, which will send the traffic to the respective application proxies.