How to create a PPPoE Server on Ubuntu? (Untested)

How to create a PPPoE Server on Ubuntu? (Untested)

How to create a PPPoE Server onUbuntu?

For one reason or another, I needed to setup a PPPoE Server on my Ubuntu machine. Unfortunately almost all the guides found were talking about setting a PPPoE client connected to a PPPoE Server. So I spend a few days testing and trying out different configurations, until I finally found how to set it up from scratch. The below instructions will look similar to the guide I referenced, but there are some extra steps to ensure that your connection will be able to access Internet properly.

Step #1: Topology Setup

First of all, the topology needs to be setup as followed: PC — PPPoE Server (Ubuntu) — Internet You can add your typical cable modem and/or router into the mix. The main issue here is to ensure that your PPPoE Server can access the Internet without any problems. To verify this, just do a quick ping test to google.com or yahoo.com.> ping

PING (74.125.155.103) 56*84) bytes of data.64 bytes from px-in-f103.1e100.net (74.125.155.103): icmp_req=1 ttl=52 time=36.9 ms64 bytes from px-in-f103.1e100.net (74.125.155.103): icmp_req=2 ttl=52 time=37.5 ms64 bytes from px-in-f103.1e100.net (74.125.155.103): icmp_req=3 ttl=52 time=34.3 ms64 bytes from px-in-f103.1e100.net (74.125.155.103): icmp_req=4 ttl=52 time=37.6 ms– ping statistics —4 packets transmitted, 4 received, 0% packet loss

If you cannot access this, check your interface. Most likely something is misconfigured there. There are several guides on how to enable your interface properly:- Network Configuration

Step #2: Install PPP and RP-PPPoE

You will need to install these components to get the PPPoE Server working. The first one is simple: just grab the ppp package from Ubuntu: > sudo apt-get install pppThe second package (rp-pppoe) requires you to build it on your own. Start by grabbing the package from this website (Roaring Penguin) > wget > tar -zxf rp-pppoe-3.10.tar.gz> cd rp-pppoe-3.10/src> ./configure> make> sudo make install

Step #3: Setup PPPoE Settings

Several files need to be created before we can start PPPoE Server. First, modify the /etc/ppp/pppoe-server-options and change it to the following: /etc/ppp/pppoe-server-options:

# PPP options for the PPPoE Server# LOC: GPL#require-paprequire-chaploginlcp-echo-interval 10lcp-echo-failure 2ms-dns 4.2.2.1ms-dns 4.2.2.3netmask 255.255.255.0defaultroutenoipdefaultusepeerdns

Next, add a username into the correct secrets file. Since we’re using require-chap, we will add it into /etc/ppp/chap-secrets. The syntax is simple: follow the example below to add a user (alice) with a simple password (1234)./etc/ppp/chap-secrets:

# Secrets for authentication using CHAP# clientserver secretIP addresses”alice”*”1234″172.32.50.2

One note: make sure that the file has the correct permissions. Sometimes the PPPoE Server won’t start if the file isn’t restricted enough. A simple chmod command will do here:> sudo chmod 600 /etc/ppp/chap-secretsLast of all, setup the IP addresses to lease for the PPPoE Server. We’re giving IP addresses 172.32.50.2 to 172.32.50.30:/etc/ppp/ipaddress_pool:

172.32.50.2-30

Step #4: Set PPPoE Scripts

We are ready to start PPPoE Server. Several things to worry about: the firewall needs to be set properly so that the PPPoE Server will be able to transfer traffic from one interface to the other, and IP forwarding needs to be enabled. Since these options will have to set every time Ubuntu reboots, they’re part of the start PPPoE script. It’s placed under /etc/ppp/start_pppoe./etc/ppp/pppoe_start:

#!/bin/bash############################### Simple script that starts PPPoE Server############################### Enable IP Forwardingecho 1 > /proc/sys/net/ipv4/ip_forward# Start PPPoE Serverpppoe-server -C isp -L 172.32.50.1 -p /etc/ppp/ipaddress_pool -I eth1 -m 1412# Set Firewall rulesiptables -t nat -F POSTROUTINGiptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

The -m option for pppoe-server is needed so that the packets don’t go beyond MTU size after the PPPoE header is attached.

For complete purposes, below is a stop script to nicely tear down the PPPoE Server and revert any changes./etc/ppp/pppoe_stop:

#!/bin/bash############################### Simple script that stops PPPoE Server############################### Disable IP Forwardingecho 0 > /proc/sys/net/ipv4/ip_forward# Kill PPPoE Serverkillall pppoe-serverkillall pppd# Flush the IPtable rules.iptables -t nat -F POSTROUTING

Step #5: Automatically start/stop PPPoE Server大理的洱海形如人耳，风平浪静时，