week 7 discussion - Copy.docx

As mentioned earlier packet filtering is an acl

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and data decoding, packet filters, static ARP and VPNs. As mentioned earlier packet filtering is an ACL method to secure a network.The network should have an active firewall program to implement an ACL fully. It has a list of firewall security rules which can block traffic based on IP protocol, IP address, and port number. An issue associated with this is that it cannot tell the difference between a real return packet and one that pretends to come from a secure connection. Cisco Access Control Lists can be used to better secure networks. ACLs has Access Control Entries that can either grant or deny access as ACE’s main roles are to deny and permit. Placing an entry close to the destination gives control by only having to configure one device. On the other hand, placing an entry close to the source can stop network traffic at any point. Therefore, when ACLs are placed close to the source, it reduces the possibility of traffic is crossing the network.ACLs can be used for packet filtering. Access Control Lists may be applied to a router so that the direction of packet flow can be determined before the router is able to make a forwarding decision. For example, configuring a router to allow packets sent by computer A to server 1, but to discard packets sent by computer B to server 1 is possible.
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  • Spring '16
  • IP address, Address Resolution Protocol

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