[an error occurred while processing this directive] FreeBSD Handbook : PPP and SLIP : Setting up a SLIP server : Quick Overview
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11.4.2. Quick Overview

In its typical configuration, using FreeBSD as a SLIP server works as follows: a SLIP user dials up your FreeBSD SLIP Server system and logs in with a special SLIP login ID that uses /usr/sbin/sliplogin as the special user's shell. The sliplogin program browses the file /etc/sliphome/slip.hosts to find a matching line for the special user, and if it finds a match, connects the serial line to an available SLIP interface and then runs the shell script /etc/sliphome/slip.login to configure the SLIP interface.

11.4.2.1. An Example of a SLIP Server Login

For example, if a SLIP user ID were Shelmerg, Shelmerg's entry in /etc/master.passwd would look something like this (except it would be all on one line):

Shelmerg:password:1964:89::0:0:Guy Helmer - SLIP:
        /usr/users/Shelmerg:/usr/sbin/sliplogin

and, when Shelmerg logs in, sliplogin will search /etc/sliphome/slip.hosts for a line that had a matching user ID; for example, there may be a line in /etc/sliphome/slip.hosts that reads:

Shelmerg        dc-slip sl-helmer       0xfffffc00      autocomp

sliplogin will find that matching line, hook the serial line into the next available SLIP interface, and then execute /etc/sliphome/slip.login like this:

/etc/sliphome/slip.login 0 19200 Shelmerg dc-slip sl-helmer 0xfffffc00 autocomp

If all goes well, /etc/sliphome/slip.login will issue an ifconfig for the SLIP interface to which sliplogin attached itself (slip interface 0, in the above example, which was the first parameter in the list given to slip.login) to set the local IP address (dc-slip), remote IP address (sl-helmer), network mask for the SLIP interface (0xfffffc00), and any additional flags (autocomp). If something goes wrong, sliplogin usually logs good informational messages via the daemon syslog facility, which usually goes into /var/log/messages (see the manual pages for syslogd(8) and syslog.conf(5), and perhaps check /etc/syslog.conf to see to which files syslogd is logging).

OK, enough of the examples -- let's dive into setting up the system.


FreeBSD Handbook : PPP and SLIP : Setting up a SLIP server : Quick Overview
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