دانلود رایگان پاورپوینت فن آوری فایروال (انگلیسی)

Firewall technologies
Firewall benefits
Configuring a Packet Filtering Firewall
Packet Filtering Firewall
stateful packet filtering
Example
Differences between packet and Stateful filtering
Advantages of Packet Filtering
Disadvantages of Packet Filtering
proxy firewall
proxy firewall advantages
Proxy disadvantages

Disadvantages of Packet Filtering

Packet filtering firewall allows the connection made directly from outside to the inside. It is not very secure when there is free access to the internet from every host at your network. One solution is to provide a single host with Internet access and let all your users to communicate with this host rather than directly dealing with the outside. A proxy is such a software agent that acts on behalf of a user. The fundamental difference between a packet filtering firewall and proxy firewall lies in the fact that proxy firewalls do not route and can truly keeps the internal and external systems separate. For the machines inside the firewall, all their information is coming from the firewall host.