Firewall architectures-screening router, Computer Networking

Assignment Help:

Screening Router


In this setup network router acts as a firewall. It checks all incoming and outgoing packets according to the predefined rules. This filter is placed at the connecting point to the external network. Clients on local network and on the Internet are allowed to communicate directly but their communication is restricted to the type allowed by the router. As router is needed for connecting to the Internet so this firewall is almost free .


 Advantages


•    Cheapest, simple and transparent
•    Router could be replaced with some intelligent system to provide better access control


 Disadvantages


•    Requires complex filtering rules and hence error-prone
•    Fine grained access control is near impossible
•    Cannot add authentication system
•    If router is compromised somehow then security is at risk


Related Discussions:- Firewall architectures-screening router

Explain multipurpose internet mail extensions, Q. Explain Multipurpose Inte...

Q. Explain Multipurpose Internet Mail Extensions? - The Multipurpose Internet Mail Extensions is an extension of SMTP that allows the transfer of multimedia and other non-ASCII

Explain about nonboundary-level masking, Q. Explain about Nonboundary-Level...

Q. Explain about Nonboundary-Level Masking? Nonboundary-Level Masking Bytes in the IP address that correspond to 255 in the mask will be repeated in the subnet addres

Determine the level of fibre channel standard, Determine the level of Fibre...

Determine the level of Fibre Channel standard The Fibre Channel standard is organized into five levels: FC-0: The Physical Interface and Media Level handles a variety of phy

Write down code snippets for the following in jade, Question 1 Using a ...

Question 1 Using a flowchart and appropriate annotations, describe the execution path of an Agent in JADE 2 Write down code snippets for the following in JADE a Agent A n

Different kinds of host in multicasting, What are the different kinds of ho...

What are the different kinds of host in multicasting?

Which type for communication switch do, In case of any new event switch do ...

In case of any new event switch do broadcast, after that always do Unicast.

Differentiate between ftp and tftp, Question 1 Explain the TCP/IP protocol...

Question 1 Explain the TCP/IP protocol suite. List (Network Interface Layer, Internet Layer, Transport Layer, Application Layer) Question 2 Write short note on

Show nonreturn to zero encoding, Q. Show Nonreturn to Zero encoding? - ...

Q. Show Nonreturn to Zero encoding? - Value of signal is for all time positive or negative - NRZ-L Signal level depends on bit represented; positive typically means 0

Transport protocols - udp and tcp, Most real-life applications are built on...

Most real-life applications are built on top of the UDP and TCP transport protocols. UDP, which stands for User Datagram Protocol, provides the capability of delivering individual

Describe the depth penetration method for a crt, Question: (a) What do ...

Question: (a) What do you understand by the following terms related to LCDs: Reflective LCDs Backlit LCDs (b) By using an example, explain the main steps of the B

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