1. -------------------------------------------------------- university “STRUCTURED FIREWALL” By. Mr. Ganesh N Pathare Mr. Shivram A Popalghat Department Of CS&IT.

2. I NTRODUCTION  Firewall  A firewall is a security guard placed at the point of entry between a private network and the outside Internet such that all incoming and outgoing packets have to pass through it.  The function of a firewall is to examine every incoming or outgoing packet and decide whether to accept or discard it.

3. “ STRUCTURED FIREWALL “ INTRODUCTION  We introducing firewall that captures existing firewall technology and allow for extension networking technologies to which it was not applied previously.  The essential components of this model are authentication, integrity assurance, access control, and their enforcement  We concentrate on decision diagram rather than the often conflicting rules.  Here we addressing compactness problem to reduce rule redundancy.

4. NEED OF PROJECT  Problems with conventional firewalls.  Consistency  Completeness  Compactness

5. IMPLEMENTATION  Methodologies  Structured firewall design consists two steps Step I  Once design a firewall using a firewall decision diagram instead of a sequence of often conflicting rules.  This method addresses the consistency problem, because an FDD is conflict free.

6. Step II  A program converts FDD into compact, functionality will remain equivalent, sequence of rules.  We used two algorithms FDD marking and FDD reduction to combine rules together.  To remove the redundancy of rules we used one more algorithm called firewall compaction.

7. O BJECTIVE ’ S  To achieve the following :  Completeness  Compactness  Consistency  To avoid often conflicting rules.  The firewall with above features is providing better security for data resource units at application layer in contrast to the conventional firewall systems.

8. CONCLUSION The firewall addresses the following:  Consistency problem solution Because a firewall decision diagram is conflict free  Completeness problem solution Because the syntactic requirements of a FDD force to conceder all type of traffic  Compactness problem solution Because in second step using two algorithm FDD reduction and FDD marking to combine rules and one algorithm called Firewall Compaction to remove redundant rules.