Internet connectivity:
The time is right and the technology is ready for you
By Olaf Pfeiffer and John Rodrigues
[ Introduction
| Internet Connectivity Parameters | Case
Study ]
[ Adapting
the Software | Dynamic Web Pages | Feedback
with Forms ]
[ Continuous Refresh | Security | Summary
]
| < Previous Page |
Security
One point not yet addressed is security. In this example, we implemented a PPP dial-up server and thus disconnected the application physically from the Internet. To get access, a user must know the telephone number to dial and know the PPP login name and password.
On the downside, the system in this application is never connected to the Internet. We always just have a point-to-point connection between the server and the host computer dialing in creating a mini-Intranet.
Putting the system onto the "real" Internet would require implementing some additional security functionality either directly into the system or into an external firewall type device. (Putting the system on the 'real internet' can be done without any changes to the commercial TCP/IP stack. Only the security aspects of the design require changes to the code.)
| < Previous Page |
[ Introduction
| Internet Connectivity Parameters | Case
Study ]
[ Adapting the Software
| Dynamic Web Pages | Feedback
with Forms ]
[ Continuous Refresh | Security | Summary
]
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