Reference Manual for the ProSafe VPN Firewall FVS318v3

As a shorter alternative to dotted-decimal notation, the netmask may also be expressed in terms of the number of ones from the left. This number is appended to the IP address, following a backward slash (/), as “/n.” In the example, the address could be written as 192.168.170.237/24, indicating that the netmask is 24 ones followed by 8 zeros.

Subnet Addressing

By looking at the addressing structures, you can see that even with a Class C address, there are a large number of hosts per network. Such a structure is an inefficient use of addresses if each end of a routed link requires a different network number. It is unlikely that the smaller office LANs would have that many devices. You can resolve this problem by using a technique known as subnet addressing.

Subnet addressing allows us to split one IP network address into smaller multiple physical networks known as subnetworks. Some of the node numbers are used as a subnet number instead. A Class B address gives us 16 bits of node numbers translating to 64,000 nodes. Most organizations do not use 64,000 nodes, so there are free bits that can be reassigned. Subnet addressing makes use of those bits that are free, as shown below.

Class B

Network

Subnet

Node

Figure B-2: Example of Subnetting a Class B Address

A Class B address can be effectively translated into multiple Class C addresses. For example, the IP address of 172.16.0.0 is assigned, but node addresses are limited to 255 maximum, allowing eight extra bits to use as a subnet address. The IP address of 172.16.97.235 would be interpreted as IP network address 172.16, subnet number 97, and node number 235. In addition to extending the number of addresses available, subnet addressing provides other benefits. Subnet addressing allows a network manager to construct an address scheme for the network by using different subnets for other geographical locations in the network or for other departments in the organization.

Network, Routing, and Firewall Basics

B-5

January 2005

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NETGEAR FVS318v3 manual Subnet Addressing, Figure B-2 Example of Subnetting a Class B Address

FVS318v3 specifications

The NETGEAR FVS318v3 is a powerful dual WAN gigabit VPN firewall designed to provide robust security and reliable connectivity for small to medium-sized businesses. It offers an array of features and technologies that make it an outstanding choice for organizations requiring secure network access and improved bandwidth management.

One of the standout features of the FVS318v3 is its dual WAN capability. This allows users to connect two separate internet connections, which enhances redundancy and ensures continuous network availability. In the event that one WAN connection fails, the device automatically switches to the backup connection, minimizing downtime and maintaining productivity.

The firewall offers advanced security features, including a stateful packet inspection (SPI) firewall and NAT (Network Address Translation), which helps protect the network from unauthorized access and external threats. Additionally, the FVS318v3 supports IPsec and SSL VPN protocols, providing secure remote access for employees working from home or on the go. With support for up to 15 SSL VPN clients and 20 IPsec VPN tunnels, it is suitable for businesses that require flexible and secure remote connectivity.

In terms of performance, the FVS318v3 boasts a high-speed gigabit throughput, ensuring fast data transmission and minimal latency. This is particularly important for businesses that rely on cloud-based applications, video conferencing, and other bandwidth-intensive activities. Furthermore, the device is equipped with advanced QoS (Quality of Service) features that allow administrators to prioritize traffic, ensuring that critical applications receive the bandwidth they need during peak usage times.

Another noteworthy characteristic of the NETGEAR FVS318v3 is its user-friendly interface, which simplifies network management and configuration. Administrators can easily set up policies, monitor traffic, and manage connected devices through an intuitive web-based interface. It also offers support for 802.1Q VLAN tagging, allowing for network segmentation and improved security management.

In conclusion, the NETGEAR FVS318v3 is a versatile and feature-rich solution that delivers exceptional security and reliability for businesses. Its dual WAN functionality, advanced VPN capabilities, high-speed performance, and ease of use make it an excellent choice for organizations looking to safeguard their networks while ensuring seamless connectivity for employees.