IPC@CHIP
®
DK241
Getting Started V1.02
Copyright © 2009 Beck IPC GmbH Page 32 of 36
IPC@CHIP
®
‟s IP address. This page shows some more or less useful information on the
chip‟s configuration.
When creating your own web pages for your IPC@CHIP
®
, you canuse the DB240
Visualisation Demo as an example.
@CHIP-RTOS-PPC also features a SSL (Secure Socket Layer) web server. SSL uses
cryptographic methods to establish a trusted connection between the SSL web server and the
browser, which makes it impossible for third parties to spy on or manipulate transferred data.
To set up the SSL web server you need a certificate which identifies your IPC@CHIP
®
unambiguously to the user. You may create such a certificate yourself or buy one from a so-
called Certification Agency. This agency then signs the certificate and guarantees its
authenticity. To register the certificate with the web server and enable the SSL functionality,
you have to use the CHIP.INI configuration file. Besides the certificate which consists of two
files, you need to generate a file containing private and public keys used by the cryptographic
functions.
3.6.4 The PPP server/client
PPP (the Point to Point Protocol) is a mechanism for running TCP/IP over a serial link - be that
a direct serial connection (using a null-modem cable), or a link made using an analogue
modem.
Other computers can dial into the IPC@CHIP
®
PPP server and communicate via the TCP/IP
link using FTP, Telnet, HTTP, etc. in the same manner as with an Ethernet TCP/IP link. One
major difference between a PPP and an Ethernet connection is of course the speed. The
IPC@CHIP
®
‟s Ethernet interfaces operate at 100 mbps, whereas an analogue modem
operates at speeds up to 56 kbps.
PPP is strictly a peer to peer protocol. There is no difference between the machine that dials in
and the machine that is dialled into. However, it is still useful to think in terms of servers and
clients. When you dial into a site to establish a PPP connection, you are considered the client.
The machine to which you connect (e.g. the IPC@CHIP
®
) is considered the server. The
@CHIP-RTOS-PPC operating system provides TCP/IP API functions for either side of this
client/server relationship.
PPP at the IPC@CHIP
®
includes the sub protocols LCP and NCP (IPCP). Supported
authentication protocols are PAP and CHAP.
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