Firewall and Proxy Facts
Keep in mind the following facts about firewalls and proxy servers.
- A firewall prevents invalid communications from entering a network while allowing valid communications to travel in and out.
- TCP/IP Filtering is a form of a very basic firewall.
- TCP/IP Filtering allows you to block ports that you specify.
- TCP/IP Filtering requires you to enable the setting for all NICs or no NICs.
- ICF blocks all externally generated communications. Communications generated internally can pass through the firewall as well as external responses to those communications.
- You can allow external communications through the firewall by enabling the appropriate ports.
- Packet filtering is available in the RAS Console.
- Packet filtering allows you to specify input and output filters for each NIC.
- Packet filtering allows you to restrict access based on ports, protocols, or IP addresses.
- Packet filtering offers a higher degree of control over network traffic.
- An ingress filter allows you to prevent malicious actions like address spoofing.
- An ingress filter will inspect packet headers to verify them.
- Proxy servers speed up Web caching and restrict access to the Internet.
- Through caching, a proxy server can significantly increase bandwidth performance.
- A proxy server allows you to restrict Internet access through user and group accounts.
- Client browsers can either automatically detect the proxy server or access it through a specific proxy IP address.
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