Chapter 3. Your Internet Service Provider (ISP)

Table of Contents

3.1.Dedicated versus dialup connectivity
3.2.The IP address
3.2.1.Static versus dynamic IP addressing
3.2.2.Routable versus non-routable IP addresses
3.3.Arranging connectivity with your ISP
3.3.1.Ordering a corporate ADSL or other commercial dedicated connection
3.3.2.Ordering cablemodem or residential ADSL service
3.3.3.Ordering a dialup connection
3.4.Arranging Services From Your ISP
3.4.1.Service List A
3.4.2.Service List B
3.4.3.Service List C
3.4.4.Service List D

Your Internet Service Provider or ISP is your connection to the Internet - it routes Internet data packets to and from your server. It also provides other essential services. This section of the user's guide reviews what ISPs offer and what the implications are in choosing among the various options available to you. While your ISP can also assist you in selecting and arranging the right Internet services for your organization, it's important to know the general range of services available, since not all ISPs offer all services.

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If you are operating the product in "server-only" mode, you will need to review your gateway/firewall documentation and perhaps consult with your ISP regarding your configuration. For example, depending on your plans for the server, your ISP may need to publish DNS records associating your mail and/or web servers with your firewall IP address. You may also need to configure your firewall for port forwarding of services.

In server-only mode, the single Ethernet connection to the local network is "trusted" as being secure and packet filtering is disabled. For that reason, a server-only server must always be behind a local firewall. You should not directly connect such a system to the Internet via an Internet Service Provider.