Figure 49 Custom Special Applications Setup Screen

Application Name — Each special application is named and will detect the ports that need to be opened so you do not need to specify them. This name is not used by the Gateway and is only to enable you to identify the connection.

Trigger Port — This is the TCP/IP port number that the Gateway uses to recognize the outgoing packet that starts special application session. Your application provider can provide you with this information.

The Gateway allows Trigger Ports that are a single value or a range of values but not a list. So ‘6599’ and ‘6577-6587’ are both valid but ‘6577, 6579, 6582’ is not.

Specify Protocol — Select the protocol (TCP or UDP) that your special application uses. Your application provider can provide you with this information.

Multiple Hosts Allowed — If your application provider uses more that one IP address during a session or responds from an address different to the one you use to start the special application then you must ensure that the Multiple Hosts Allowed box is checked. Otherwise leave it clear. Your application provider can provide you with this information.

CAUTION: Selecting Multiple Hosts Allowed weakens the security that your Gateway’s firewall is able to provide and should only be used if the special application requires it.

Timeout — Enter the number of seconds the Gateway should wait for the first reply from the special application server before it abandons the connection.

The default Timeout is three seconds. If you find that connections are being dropped enter a higher value.

Session Chaining — Some special applications need to take control of a session. If the special application you wish to run requires this ensure that Session Chaining is enabled otherwise ensure that it is disabled.

CAUTION: Allowing Session Chaining weakens the security that your Gateway’s firewall is able to provide and should only be used if the special application requires it.

Address Translation Type — If your special application provider embeds IP addresses in TCP or UDP packets you will have to enable address translation on the appropriate protocol type. Your application provider can provide you with this information.

When you have configured your special application click Add to save your changes or Close to quit without making any changes.

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3Com 3CR856-95 manual Custom Special Applications Setup Screen

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.