Security Technology Firewalls and VPN - Coursework Example

In my research, i came about Comodo internet security, pc tools firewall plus free edition and zonealarm free firewall that are the best firewalls to be used at present because they are very light, cheap, easy to maintain as some of them like comodo has combined its antivirus program with firewall pro hence free security program for everyone. A virtual private network (VPN) spreads secluded network across a public network, for instance the internet. It makes telecommunication possible, practical and secure (Stewart p. 87). Extranets are said to be border networks quietly similar to DMZ because resources are accessed by outside entities.

On the other hand, Stewart (p. 87) adds that an extranet is not open for free usage but by specific sets of people. This, however states that a VPN configuration is necessary to get access to the extranet and therefore with this, extranets are both possible and practical. There might be factors one has to consider for both the internal and external firewalls to allow a remote user to access an internal machine from the internet using Timbuktu as in this case shown above.One should be able to use a router that can handle inbound a well as outbound packet filtering on each interface.

You can create a default deny to reject packets,then deny inbound traffic to come f internal address while t outer does not.You can also deny all traffic with invalid addresses as well as all traffic with source routes. Again,deny all ICMP traffic over good size and lastly, reassemble fragments into entire packets. In this network architecture, it is also easy to create a DMZ just between the two firewalls. It will clearly show that the outside world can go through layers therefore easier to hit the DMZ and presumably what is there is at a lower risk.

Multiple layers of firewalls are more secure even though it seems to be very difficult