46
In fact, HDLC is a much more general protocol devised by the International Standards Organization (ISO) and is also an essential component of the X.25 specification.
47
If you have any general questions about PPP, ask the people on the Linux-net mailing list at vger.rutgers.edu.
48
Karl can be reached at [email protected].
49
The default network route is installed only if none is already present.
50
If you edit syslog.conf to redirect these log messages to a file, make sure this file isn't world readable, as chat also logs the entire chat script by default - including passwords.
51
More information on two dynamic host assignment mechanisms can be found at http://www.dynip.com/ and http://www.justlinux.com/dynamic_dns.html.
52
Using hostnames in this option has consequences for CHAP authentication. Please refer to the 'Authentication with PPP' section later in this chapter.
53
The ipcp-accept-local and ipcp-accept-remote options instruct your pppd to accept the local and remote IP addresses being offered by the remote PPP, even if you've supplied some in your configuration. If these options are not configured, your pppd will reject any attempt to negotiate the IP addresses used.
54
If we wanted to have routes for other sites created when they dial in, we'd add appropriate case statements to cover those in which the… appears in the example.
55
'Secret' is just the PPP name for passwords. PPP secrets don't have the same length limitation as Linux login passwords.
56
The double quotes are not part of the secret; they merely serve to protect the whitespace within it.
57
This hostname is taken from the CHAP challenge.
58
The useradd or adduser utility, if you have it, will simplify this task.
59
The term firewall comes from a device used to protect people from fire. The firewall is a shield of material resistant to fire that is placed between a potential fire and the people it is protecting.
60
