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

Internet transport service proposal, will you have this done to day? And ho...

will you have this done to day? And how long will this take?

Advantages - point to point , Advantages There are  times when  using ...

Advantages There are  times when  using  packet filters makes  sense. If the  connections require high  throughput  or the protocols  has proprietary technology that makes  it

List the advantages of microwaves, List the Advantages of microwaves.  ...

List the Advantages of microwaves.  a. They need no right of way acquisition among towers. b. They can carry high quantities of information because of their high operating f

Distributed systems, There are two dominant forms of building distributed s...

There are two dominant forms of building distributed systems: client-server systems, i.e. systems in which one machine acts as a server and act as clients; and peer-to-peer systems

Inductor, #clasification of inductor

#clasification of inductor

What is stop-and-wait automatic repeat request, What is Stop-and-Wait Autom...

What is Stop-and-Wait Automatic Repeat Request? Error correction in Stop-and-Wait ARQ is implemented by keeping a copy of the sent frame and retransmitting of the frame when th

Explain linear array interconnection networks, Linear Array: This is a most...

Linear Array: This is a most basic interconnection pattern. Processors are connected in a linear one-dimensional array. The first as well as last processors are attached with one a

Illustrate stop-and-wait automatic repeat request, Q. Illustrate Stop-and-W...

Q. Illustrate Stop-and-Wait Automatic Repeat request? - Simplest flow as well as error control mechanism - The sending device keeps a duplicate copy of the last frame transm

What do you mean by osi, What do you mean by OSI? The Open System Inter...

What do you mean by OSI? The Open System Interconnection (OSI) reference model explains how information from a software application in one computer moves by a network medium to

What is manchester, Q. What is Manchester? - Utilizes an inversion at t...

Q. What is Manchester? - Utilizes an inversion at the middle of each bit interval for both synchronization and bit representation - Negative-to-positive represents binary 1

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