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Chapter 11—Networking
Table 11.18 Troubleshooting TCP/IP Connections Continued
Problem Symptoms Solution
One user to an IP Can’t share the Web. If you’re trying to share your
address. Internet connection, use software
such as Artisoft’s Ishare or check
with your networking hardware
vendor for their recommendations.
If your LAN uses a proxy server for
connection, some sharing products
might not work.
Windows 98 Second Edition, Windows
2000 Professional, and Windows Me
can all be configured as a gateway to
enable Internet sharing from a cable
modem, dial-up modem, ISDN, or
DSL modem connection. For details,
see Chapter 6, “Serial Ports and
Modems.”
Browser can’t To verify that the TCP/IP connecdisplay
Web pages. tion works, open an MS-DOS window
and type PING websitename
(replace websitename with a particular
IP address or Web site). If
PING indicates that signals are
returning, check the proxy settings
in the browser. If PING can’t connect,
recheck your TCP/IP settings
for the NIC or modem and retry
after making changes.
Direct Cable Connections
Null Modem and Parallel Data-Transfer Cables
A null modem cable is a special cable that has its circuits crossed so
the transmit data (TD) pin on each serial port connector leads to
the receive data (RD) pin on the other. A cable that connects the
systems’ parallel ports in this way is called a parallel data-transfer
cable. Cables such as these are usually available at computer stores
that sell cables. They are sometimes called LapLink cables, after one
of the first software products to introduce the concept of the direct
cable connection. The cables supplied with FastLynx and other
data-transfer programs for MS-DOS and Windows 3.x/9x/Me will
also work. A good rule of thumb is this: If the cable works for
LapLink or the MS-DOS INTERLNK file transfer utility, you can use
it for Direct Cable Connection, as well.