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Rejects all data with local addresses from outside

Posted on 2005-03-07
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for the Firewall why
•"Rejects all data with local addresses from outside " from the following??

Firewall
–Protects local area network (LAN) from outside intruders
–Safey barrier for data flowing in and out
–Prohibit all data not allowed or permit all data not prohibited
•Types of firewalls
–Packet-filtering firewalls
•Rejects all data with local addresses from outside
•Examine only source not content
–Application level firewalls
•Attempt to scan data
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Question by:she1
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lrmoore earned 120 total points
ID: 13477245
>•"Rejects all data with local addresses from outside " from the following??

This means that the firewall will protect from IP address spoofing. If a packet comes in with a spoofed source that has the same IP subnet as the inside (local) address of the firewall, the packets will be dropped. This protects against some denial of service attacks that send a packet to a host with the host's own IP address as the source. This created caos with the server trying to respond to itself.
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