User's Manual

Part # 34357-MNL Rev.03 SPEEDLAN 9200 User Guide
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4 IP Protocols and Ports: After clicking Add Protocol, this text box will be
populated with the data, based on what you entered in the IP Protocol, Port
number and Port range text boxes.
5 Click Add Service to add the service to the Existing Services list on the
Services page.
Existing Services
The Existing Services list shows all defined services.
• Service Name: The name of the service.
• IP Protocol: The IP protocol by which data sent from one network node to
another is classified (e.g., TCP, UDP, ICMP, OSPF).
• Port: A number used in the TCP and UDP protocols to differentiate
streams. The number is included in the transmitted packets to link the
incoming data to the correct service (e.g., port 80 is used for HTTP).
Note: To remove a service, select its check box and click Delete Selected. Click All
to select all of the existing services. Click None to clear all selections. If an entry has
(In Use) instead of a check box, this means the service is in use and cannot be
removed.
Three Features of NAT
NAT Background Info
Network Address Translation (NAT) occurs when there is a translation from one IP
address to another. There are several implementations of NAT - each with their own
purpose. One would choose the type of NAT that suits the task.
The SPEEDLAN 9200 offers 3 features that use NAT: Address Sharing, Internal Servers
and 1:1 NAT. Each is described below.
1. Address Sharing: This feature allows an administrator to share a public IP address
with privately addressed nodes. Typically, this is used to allow outbound connections to
the Internet from hosts who do not have IP addresses that can be reached from the
Internet. In implementing Address Sharing, requests to the Internet would be directed