/usr/share/doc/ppp/examples/interfaces is in ppp 2.4.5-5ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 | # copy one of these examples to /etc/network/interfaces
# The VP, VC and encapsulation must match the ones used by your ISP, these
# examples use 8.35 with LLC encapsulation and assume that ATM interface
# 0 is the DSL modem.
# br2684ctl and atmarp are part of the br2684ctl and atm-tools packages,
# check the atmarp(8) and br2684ctl(8) man pages for details about the
# command line options.
# PPPoE
# You need to create an appropriate /etc/ppp/peers/pppoe file, look at
# /usr/share/doc/ppp/examples/peers-pppoe for an example and configure it
# to use the nas0 interface.
auto pppoe
iface pppoe inet ppp
provider pppoe
pre-up br2684ctl -b -c 0 -a 0.8.35
pre-up ip link set up nas0
post-down kill $(cat /var/run/nas0.pid)
# RFC 1483 bridged, with dynamically assigned address
auto nas0
iface nas0 inet dhcp
pre-up br2684ctl -b -c ${IFACE#nas} -a 0.8.35
post-down kill $(cat /var/run/$IFACE.pid)
# RFC 1483 bridged, with statically assigned address
auto nas0
iface nas0 inet static
address 192.0.2.1
netmask 255.255.255.0
broadcast 192.0.2.255
gateway 192.0.2.254
pre-up br2684ctl -b -c ${IFACE#nas} -a 0.8.35
post-down kill $(cat /var/run/$IFACE.pid)
# Classical IP over ATM (CLIP)
# This assumes that atmarpd is already running.
auto atm0
iface atm0 inet static
address 192.0.2.1
netmask 255.255.255.0
broadcast 192.0.2.255
gateway 192.0.2.254
pre-up atmarp -c $IFACE
post-up atmarp -s 192.0.2.254 0.8.35
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