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Overview:

This white paper explains the different kinds of Access Control List (ACL) entries and what happens when different kinds of packets encounter these various entries. ACLs are used to block IP packets from being forwarded by a router. RFC 1858 covers security considerations for IP fragment filtering and highlights two attacks on hosts that involve IP fragments of TCP packets, the Tiny Fragment Attack and the Overlapping Fragment Attack. Blocking these attacks is desirable because they can compromise a host, or tie up all of its internal resources.

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Format:PDFSize:38 KB
Date:Dec 2003
Pages:10

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