Packet screening in computer networks

[Sanith]

Hi,

Can anyone tell me How Packet Screening takes place or Work in Computer network.

Reply required ASAP.
thanks

[DllD]

Hi sanith,

Basically when A system for screening data packets transmitted between a network always check for protection, because there are two networks, such as a private network, and another network, such as a public network.

The system includes a dedicated computer with multiple (specifically, three) types of network ports: one connected to each of the private and public networks, and one connected to a proxy network that contains a predetermined number of the hosts and services, some of which may mirror a subset of those found on the private network. The proxy network is isolated from the private network, so it cannot be used as a jumping off point for intruders. Packets received at the screen (either into or out of a host in the private network) are filtered based upon their contents, state information and other criteria, including their source and destination, and actions are taken by the screen depending upon the determination of the filtering phase.

The passing through of packets without the addition of any network address pertaining to the screening system allows the screening system to function without being identifiable by such an address, and therefore it is more difficult to target as an IP entity, e.g. by intruders.

Hope this help you.

[Alchmey]

hey Sanith
A method and system is provided for performing inbound call screening in a packet-based network, such as an H.323 Voice over IP (VoIP) network. The inbound gateways on the network are registered with inbound gatekeepers, and standard messages are used between an inbound gateway, an inbound gatekeeper and an inbound screening database to decide: whether an inbound call to a particular called number (DID) is to be allowed into the network; whether the called number should be translated into a different called number; and whether a routing index should be included in the called number to indicate the destination of the call.

thanks

[Michael25]

HI Sanith,

In computer networks packet screening includes packet filtering operations which is implemented in the hierarchical technique. Received packet traffic is first filtered with a first filtering criteria. this first filtering action generates a first pass traffic portion from the received packet traffic. The fail traffic portion is then second filtered with a second filtering criteria.

This second filtering action generates a second pass traffic portion and a reject traffic portion. The first filtering criteria provide for higher throughput, lower accuracy processing while the second filtering criteria provide for lower throughput, higher accuracy processing.

It is little bit difficult to understand but very interesting, all in all that is what a computer network is all about.
glad to see you some reply.
Thanks