Advantages and disadvantage of packet filtering firewall, Computer Network Security

Assignment Help:

Advantages and Disadvantage of Packet Filtering firewall

 

Advantages

  • One screening router can help protect entire network

One key advantage of packet filtering is that a single, strategically placed filter can help protect an entire network. If there is only one router that  connects organization site to the Internet, then it provides great advantage on network security, regardless of the size of the site by doing packet filtering on that router.

 

  •  Packet filtering doesn’t require user knowledge or cooperation

Packet filtering does not require any custom software or configuration of client machines. When a packet filtering router let a packet through, the router is indistinguishable from a normal router. This transparency means that the packet filtering can be done without the cooperation and often without the knowledge of users.


 Disadvantages

  •  Current filtering tools are not perfect

 The rules of packet filtering are hard to configure and once configured, they seem hard to test. The packet filtering capabilities of many products are incomplete and the implementation of certain types of filters is almost impossible. Packet filtering packages may have bugs in them that might fail packet filtering implementation. This may allow few packets to pass into private network without proper checking.

 

  •  Some rules can’t readily be enforced by normal packet filtering routers

The information available to packet filtering router is limited. Packets have information about their host but they cannot tell about the user. So, generally no restrictions can be enforced on particular users. Restriction can be enforced on the users who could access the ports through high level protocols. These protocols ensure that no other user is accessing that port. But that kind of control can easily be subverted.


Related Discussions:- Advantages and disadvantage of packet filtering firewall

Describe des encryption, (a) Describe DES encryption with a block diagram a...

(a) Describe DES encryption with a block diagram and brief steps. (b) How does triple DES improve security. What is the effective key length of triple DES? How can 3DES be compa

Tcp- reliable transport service, TCP-RELIABLE TRANSPORT SERVICE INTRO...

TCP-RELIABLE TRANSPORT SERVICE INTRODUCTION:  TCP is the major transport protocol architecture in the TCP/IP suite. It uses unreliable datagram function offered by IP whe

TCP/IP v OSI, What are the main differences between TCP/IP vs OSI?

What are the main differences between TCP/IP vs OSI?

Describe the time limit problem, Problem: (a) Use a simple example to ...

Problem: (a) Use a simple example to explain what is meant by a finite state machine. (b) Describe the time limit problem in an interrupt-driven system. (c) A certain m

Fragmentation, FRAGMENTATION One method is to limit datagram size to s...

FRAGMENTATION One method is to limit datagram size to smallest MTU of any server. IP needs fragmentation i.e. datagrams can be divided into pieces to fit in network with small

Different architectures for wireless networks, (a) What are the different a...

(a) What are the different architectures for wireless networks? (b) Explain how WEP authentication and encryption works, describe the vulnerability. (c) In what ways are secu

Direct sequence modulation, Question 1 a) Provide three advantages of ...

Question 1 a) Provide three advantages of using optical fiber. b) Distinguish between "Direct Sequence Modulation" and "Frequency Hopping" c) Decribe the purpose of using "

Types of idss and detection methods, Types of IDSs and Detection Methods ...

Types of IDSs and Detection Methods IDSs operate as network based, host based, or application based systems and focused on protecting network information assets. All the IDSs us

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd