1. Untuk kernel options tidak ada yg spesifik untuk kebutuhan setup ini, asalkan:

- device
ppp
# Kernel PPP

- device
tun
# Packet tunnel.

Secara default (Kernel Generic) option itu mustinya sudah ada. Dengan FreeBSD 5.X tentunya options kernel akan diload secara
otomatis, kalo tidak bisa gunakan "kldload(8)" jadi tidak usaha attach options di kernelnya _KECUALI_ FreeBSD 4.X versi warisan, ada
beberapa options yg musti diattach di kernel diantaranya "netgraph(4)". 

2. Daemon yg digunakan adalah "pppd(8)" mirip dengan koneksi dialup

biasa, cuma kita skg lewat ethernet aja (Ini beda secara fisik), jd

tidak lewat serial com. Karena kita bekerja dengan daemon "pppd(8)"

maka kita tentunya maen "ppp.conf". Dibawah ini beberapa contohnya:


#################################################################

# PPP
Sample Configuration File

# Originally written by Toshiharu OHNO

# Simplified 5/14/1999 by 
  This e-mail address is being protected from spambots. You need JavaScript enabled to view it
 

#

# See /usr/share/examples/ppp/ for some examples

#

# $FreeBSD: src/etc/ppp/ppp.conf,v 1.8 2001/06/21 15:42:26 brian Exp $

#################################################################


default:

#set log Phase Chat LCP IPCP CCP tun command

set log Phase tun command


ISP:

set device PPPoE:rl0
# rl0 adalah eth yg terhubung ke modem langsung

# biasanya eksternal ethernet.

set authname username_anda

set authkey password_anda

set dial

set login

set cd 5

set crtscts off

#set ifaddr 10.0.0.1/0 10.0.0.2/0 255.255.255.0 0.0.0.0

add default HISADDR

set timeout 0
# 3 minute idle timer (the default)

# no idle time out, will not disconnect

enable dns
# request DNS info (for resolv.conf)


set mru 1492

set mtu 1492

#set speed sync

enable lqr

#set lqrperiod 5


# For noisy lines, we may want to reconnect (up to 20 times) after loss

# of carrier, with 3 second delays between each attempt:

#

#set reconnect 3 20

set redial 0 0


Catatan: Perhatikan juga permission file ini karena memuat informasi 

username/password. Permission secara default sudah OK.



root# ls -l /etc/ppp/ppp.conf

-rw-------
1 root
wheel
1133 Mar
3 23:27 /etc/ppp/ppp.conf


3. Biar auto booting edit /etc/rc.conf anda:



root# grep ppp /etc/rc.conf

# Activate user ppp auto start at boot time

ppp_enable="YES"
# Start User PPP task

ppp_mode="ddial"
# ddial, auto, background

ppp_profile="ISP"
# section in ppp.conf to exec

ppp_nat="NO"


4. Jika `everything is OK' kudu ada proses spt ini:


root# ifconfig

tun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1492

inet 0.0.0.0 --> 255.255.255.255 netmask 0xff000000

inet 202.xxx.xxx.x --> 10.0.0.1 netmask 0xffffffff

Opened by PID 238 



Dimana IP "202.xxx.xxx.x" adalah IP Public kita yg diassign dari ISP

secara auto di server PPPoEnya (Mis: DSLAM-nya).


Kita coba check juga daemon ppp yg sudah jalan:


root# ps ax | grep ppp

238
??
Ss
12:32.07 /usr/sbin/ppp -quiet -ddial ISP


Jangan lupa check juga log filenya /var/log/ppp.conf:



Mar
8 01:52:14 iix-kumprang ppp[238]: tun0: Phase: deflink: Connected!

Mar
8 01:52:14 iix-kumprang ppp[238]: tun0: Phase: deflink: opening -> dial

Mar
8 01:52:14 iix-kumprang ppp[238]: tun0: Phase: deflink: dial -> carrier

Mar
8 01:52:15 iix-kumprang ppp[238]: tun0: Phase: Received NGM_PPPOE_ACNAME (hook "pppoebdg.isp.net.id")

Mar
8 01:52:15 iix-kumprang ppp[238]: tun0: Phase: Received NGM_PPPOE_SESSIONID

Mar
8 01:52:15 iix-kumprang ppp[238]: tun0: Phase: Received NGM_PPPOE_SUCCESS

Mar
8 01:52:15 iix-kumprang ppp[238]: tun0: Phase: deflink: carrier -> login

Mar
8 01:52:15 iix-kumprang ppp[238]: tun0: Phase: deflink: login -> lcp

Mar
8 01:52:25 iix-kumprang ppp[238]: tun0: Phase: bundle: Authenticate

Mar
8 01:52:25 iix-kumprang ppp[238]: tun0: Phase: deflink: his = CHAP 0x05, mine = none

Mar
8 01:52:27 iix-kumprang ppp[238]: tun0: Phase: Chap Input: CHALLENGE (21 bytes from pppoe)

Mar
8 01:52:27 iix-kumprang ppp[238]: tun0: Phase: Chap Output: RESPONSE (username_anda)

Mar
8 01:52:27 iix-kumprang ppp[238]: tun0: Phase: Chap Input: SUCCESS

Mar
8 01:52:27 iix-kumprang ppp[238]: tun0: Phase: deflink: lcp -> open

Mar
8 01:52:27 iix-kumprang ppp[238]: tun0: Phase: bundle: Network