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01-27-2009, 05:55 PM #1New User
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- Jan 2009
firewall question fifth edition pg. 652
I am looking at the SDM firewall portion of Ch. 10, pg. 652 of the fifth edition, and am having some trouble grasping the material.
After running the SDM configuration wizard, the output of show run generates the following output:
access-list 100 remark auto generated by SDM firewall configuration
access-list 100 remark SDM_ACL Category=1
access-list 100 deny ip 10.1.3.0 0.0.0.255 any
access-list 100 deny ip 188.8.131.52 0.0.0.3 any
access-list 100 deny ip 10.1.4.0 0.0.0.255 any
access-list 100 deny ip host 255.255.255.255 any
access-list 100 deny ip 127.0.0.0 0.255.255.255 any
access-list 100 permit ip any any
Then the book states the following:
"Notice that ACL's are inbound on an inside interface."
What specifically about the above output indicates that this ACL is applied "inbound on an inside interface"?
The paragraph continues:
"These ACL's define the traffic that's allowed to out and also what's allowed to pass through the inspect firewall."
Ok, this seems to be contradictory. From my understanding, ACL's are either applied inbound, or outbound, and this statement seems to be saying that these ACL's are applied in both directions. What am I missing here?
Additinaly, is there a diagram or example in the book that actually corresponds to this example? It does not seem to be the familiar Corp router example, and i did not see another example in the chapter that semeed to match up with what is being presented here.
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