Specifications

Niagara Release 2.3
Revised: May 22, 2002 Niagara Networking & Connectivity Guide
Chapter 5 Connecting to an ISP
Connecting Windows-based Hosts via Telephone Modem
5–26
The JACE-4/5 treats an update failure in the same manner as an ISP connection
failure. It hangs up the modem, waits and then retries again. If the update fails several
times in a row, then the JACE reverts to dial-in mode. For more information on
configuring the wait delays, retry counts, etc., see Table 5-1 in the “Configuring
ras.properties for Captive ISP” section on page 5-10.
Connecting Windows-based Hosts via
Telephone Modem
As mentioned in the “Niagara Considerations” section on page 5-1, you may be able
to configure the Remote Access Server (RAS) on Windows-based Niagara hosts to
dial an ISP. However, the following notes apply:
• RAS will not automatically redial on disconnect. That function must be
provided by a third-party software application (such as RascalPro by Basta
Computing).
• If the ISP assigns dynamic IP addresses, an Internet DDNS provider (TZO or
other) must provide Windows-based client software to implement DDNS on
these hosts.
• This scenario has not been tested by Systems Engineering. We recommend that
you set up a pilot to test them before implementing in a live job.
This section provides a general overview of using RAS to connect to an ISP. To
implement automatic redials and DDNS on your host, consult the documentation
from the software vendors you choose for each function.
Note Be sure to review the information in the the “Niagara Considerations” section on
page 5-1 for information on using NAT and proxies, selecting an ISP, and security
considerations of attaching hosts directly to the Internet.
Configuring the JACE-NP
These previous topics help you configure dial-up to an ISP on the JACE-NP.
• “Installing and Configuring Modems,” page 4-17.
• “Configuring the RAS Software,” page 4-20
• “Granting Dial-in Permissions,” page 4-25
Work with your ISP to configure RAS to meet their network requirements.
Configuring a Web Supervisor
These previous topics help you configure dial-up to an ISP on a Web
Supervisor.
• “Installing and Configuring Modems,” page 4-26.