Figure 51 VPN Mode Screen

L2TP Configuration

If you have enabled L2TP over IPSec you must enter the following items:

1In the IPSec Configuration field, enter This Gateway’s ID as an Internet IP address or name of the Gateway that you are configuring. This value is common across all IPSec connections but does not apply to PPTP connections. If PPTP only is enabled, This Gateway’s ID field disappears.

2In the L2TP Configuration field, enter:

■the Domain Name as an IP address. A Domain Name locates a website on the Internet.

■The IPSec Shared Key. This is the key for the connection and is a combination of letters, numbers and punctuation and can be up to 64 characters in length. 3Com recommends that the key and password are not the same. The user will need to know the IPSec Shared Key to enable connection.

■In the Encryption Level field, choose either Allow DES tunnels or Allow 3DES tunnels. 3DES is more secure but may take longer to encrypt and decrypt.

3DES is not shipped with the Gateway as standard due to international restrictions on encryption. If your country permits its use it can be downloaded from the 3Com web site at

http://www.3com.com/

3To set up the Gateway for L2TP over IPSec you must allocate IP addresses from the Gateway’s LAN for use with L2TP over IPSec. The connections made by L2TP over IPSec will appear to come from these addresses. The addresses must be in a continuous range.

In the Address Pool for PPTP and L2TP clients field enter:

■The first LAN address you wish to reserve for L2TP over IPSec in the First Remote IP Address field.

■The last LAN address you wish to reserve for L2TP over IPSec in the Last Remote IP Address field.

If PPTP mode is selected, then the Address Pool is the same for PPTP and L2TP over IPSec clients.

These addresses must be within the Gateway’s LAN subnet and must not form part of the DHCP pool..

4Click Apply to save your changes.

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3Com 3CR856-95 manual L2TP Configuration, Address Pool for Pptp and L2TP clients field enter
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3CR856-95 specifications

The 3Com 3CR856-95 is a versatile networking device designed to meet the demands of small to medium-sized businesses. As a part of the 3Com OfficeConnect series, the 3CR856-95 combines switching, routing, and security features into a compact, integrated solution that enhances network performance and reliability.

One of the main features of the 3CR856-95 is its ability to support multiple network configurations. It operates as a router and switch simultaneously, offering six Ethernet ports for wired connections, while also integrating wireless capabilities. This allows businesses to connect various devices seamlessly, including computers, printers, and smartphones, providing flexibility and convenience in a modern office environment.

The device incorporates advanced technologies such as Quality of Service (QoS) which prioritizes network traffic to ensure that bandwidth-intensive applications like video conferencing and VoIP run smoothly. This feature is essential for maintaining productivity and communication efficiency in busy office settings. Additionally, the 3CR856-95 supports both IPv4 and IPv6 protocols, making it a future-proof solution as businesses transition to the newer Internet Protocol standard.

Security is a critical consideration for any networking equipment, and the 3CR856-95 addresses this with robust measures. It includes a built-in firewall that protects the network from external threats, along with support for Virtual Private Networks (VPN), allowing secure remote access for employees working from off-site locations. Furthermore, the device supports WPA2 encryption for wireless connections, safeguarding sensitive data transmitted over the network.

Another important characteristic of the 3CR856-95 is its user-friendly interface, which simplifies the setup and management of the network. The device features a web-based management console that allows network administrators to easily configure settings, monitor traffic, and troubleshoot issues from any internet-connected device. This accessibility saves time and reduces the complexity often associated with network management.

In summary, the 3Com 3CR856-95 is a robust and feature-rich networking solution tailored for small to medium-sized businesses. With its combination of switching, routing, and security features, it provides a reliable platform for facilitating seamless communication and connectivity. Its support for advanced technologies and user-friendly management interface makes it a smart choice for organizations looking to enhance their network infrastructure.
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