FireBrick 2700 Configuration run-through

Here we will build a config file for a FB2700, from scratch, it should help you to build a configuration for your line(s) and help you understand the XML syntax etc.

Overview

We have an ADSL line with the following details:

• Username= abc@a.1 Password=secret
• Routed IP block = 90.155.1.0/28

Default Config

The default configuration (or a fully-loaded FireBrick) looks like this:

<?xml version="1.0" encoding="UTF-8"?>
<config xmlns="http://firebrick.ltd.uk/xml/fb2700/"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://firebrick.ltd.uk/xml/fb2700/
http://firebrick.ltd.uk/xml/fb2700/0.00.605.xsd"
timestamp="1970-01-01T00:00:07Z">
<port name="LAN1" ports="1"/>
<port name="LAN2" ports="2"/>
<port name="LAN3" ports="3"/>
<port name="LAN4" ports="4"/>
<interface port="LAN1">
<subnet comment="dhcp client"/>
<subnet ip="2001:DB8::1/64 10.0.0.1/24" nat="true"
comment="Temporary IPs for setup only, delete when finished configuring"/>
<dhcp ip="10.0.0.100-199"/>
</interface>
<ppp port="LAN4" username="startup_user@startup_domain" password=""
comment="Example PPPoE config for DSL/FTTC/FTTP/etc"/>
<services>
<ntp/>
<telnet comment="Set allow IP list to restrict access"/>
<http/>
</services>
<rule-set target-interface="LAN1" drop="reject" comment="default
firewall rule - block incoming">
<rule source-interface="self" comment="allow from the FireBrick
though"/>
</rule-set>
</config>

Which sets up the 4 Ethernet ports as separate LANs, and an IP of 10.0.0.1 (and 2001:DB8::1) with the FireBrick acting DHCP server on the first port. So, connecting a computer to Port 1 should get you a 10.0.0.x IP address, and you can access http://10.0.0.1

Port 4 is set as an example of a PPPoE client, we'll set this up a little later.

Configuring Initial Basic Settings

Set yourself a user with full debug rights, eg:

<user name="john" timeout="PT20M" level="DEBUG" password="secret"/>

Modify the ntp time server to use the AAISP time server:

<ntp timeserver="90.155.53.32 2001:8B0:0:53::5A9B:3520"/>

modify the telnet service to permit only access from your LAN:

<telnet allow="90.155.1.0/28"/>

Set DNS servers and your domain name, under the services:

<dns domain="yourdomain.tld" resolvers="217.169.20.20 217.169.20.21"/>

LAN Subnet

We want to use just Ethernet port 1 on the FireBrick for our LAN, we'll be connecting port 1 to a switch, and all our devices will be plugged in to that switch.

So, first we'll add a new subnet, this can go under the current 10.0.0.1 subnet (which we'll delete later.) And we'll make this a DHCP server:

<subnet ip="90.155.1.1/28" comment="LAN"/>
<dhcp ip="90.155.1.2-12"/>

Remove the existing DHCP settings for the 10.0.0.1 interface. The LAN! interface now looks like this:

<interface port="LAN1">
<subnet comment="dhcp client"/>
<subnet ip="2001:DB8::1/64 10.0.0.1/24" nat="true" comment="Temporary IPs for setup only, delete when finished configuring"/>
<subnet ip="90.155.1.1/28" comment="LAN"/>
<dhcp ip="90.155.1.2-12"/>
</interface>

Our complete config now looks like this:

<?xml version="1.0" encoding="UTF-8"?>
<config xmlns="http://firebrick.ltd.uk/xml/fb2700/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://firebrick.ltd.uk/xml/fb2700/
http://firebrick.ltd.uk/xml/fb2700/0.00.605.xsd" timestamp="1970-01-01T00:00:07Z">
<user name="john" timeout="PT20M" level="DEBUG" password="secret"/>
<port name="LAN1" ports="1"/>
<port name="LAN2" ports="2"/>
<port name="LAN3" ports="3"/>
<port name="LAN4" ports="4"/>
<interface port="LAN1">
<subnet comment="dhcp client"/>
<subnet ip="2001:DB8::1/64 10.0.0.1/24" nat="true" comment="Temporary IPs for setup only, delete when finished configuring"/>
<subnet ip="90.155.1.1/28" comment="LAN"/>
<dhcp ip="90.155.1.2-12"/>
</interface>
<ppp port="LAN4" username="startup_user@startup_domain" password=""
comment="Example PPPoE config for DSL/FTTC/FTTP/etc"/>
<services>
<dns domain="yourdomain.tld" resolvers="217.169.20.20 217.169.20.21"/>
<ntp timeserver="90.155.53.32 2001:8B0:0:53::5A9B:3520"/>
<telnet allow="90.155.1.0/28"/>
<http/>
</services>
<rule-set target-interface="LAN1" drop="reject" comment="default
firewall rule - block incoming">
<rule source-interface="self" comment="allow from the FireBrick
though"/>
</rule-set>
</config>

At this point we can save the config, there should be no errors.

Our computer should then pick up a new 90.155.1.x IP address, and we can connected back to the FireBrick on http://90.155.1.1

if that works, we can now safely remove the DHCP client subnet and the 10.0.0.1 subnet, so remove the lines:

<subnet comment="dhcp client"/>
<subnet ip="2001:DB8::1/64 10.0.0.1/24" nat="true"
comment="Temporary IPs for setup only, delete when finished configuring"/>

Save, and re-connect to the web interface.

PPPoE

More info on http://www.firebrick.co.uk/fb2700/pppoe.php

The FireBrick 2700 supports PPPoE - so you can use it to connect via a modem, eg a:

• FTTC Modem
• A standard issue AAISP ZyXEL P660-D1, in bridge mode
• Another modem set for bridge mode
• A modem such as a or Draytek 120

In our default config we already have some PPPoE settings:

<ppp port="LAN4" username="startup_user@startup_domain" password="" comment="Example PPPoE config for DSL/FTTC/FTTP/etc"/>

This is using Ethernet port 4, so plug your modem in to that port.

This line can be changed for your ADSL settings, eg:

<ppp port="WAN1" username="abc@a.1" password="secret" comment="BT ADSL" graph="BT ADSL" log="true"/>

We've also set the FireBrick to create a graph for this, as well as to log.

We've changed the port to WAN1, so we also need to change the port config earlier in the file, so change

<port name="LAN4" ports="4"/>

to:

<port name="WAN1" ports="4"/>

Our complete config in full now looks like this:

<?xml version="1.0" encoding="UTF-8"?>
<config xmlns="http://firebrick.ltd.uk/xml/fb2700/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://firebrick.ltd.uk/xml/fb2700/
http://firebrick.ltd.uk/xml/fb2700/0.00.605.xsd" timestamp="1970-01-01T00:00:07Z">
<user name="john" timeout="PT20M" level="DEBUG" password="secret"/>
<port name="LAN1" ports="1"/>
<port name="LAN2" ports="2"/>
<port name="LAN3" ports="3"/>
<port name="WAN4" ports="4"/>
<interface port="LAN1">
<subnet comment="dhcp client"/>
<subnet ip="2001:DB8::1/64 10.0.0.1/24" nat="true" comment="Temporary IPs for setup only, delete when finished configuring"/>
<subnet ip="90.155.1.1/28" comment="LAN"/>
<dhcp ip="90.155.1.2-12"/>
</interface>
<ppp port="WAN1" username="abc@a.1" password="secret" comment="BT ADSL" graph="BT ADSL" log="true"/>
<services>
<dns domain="yourdomain.tld" resolvers="217.169.20.20 217.169.20.21"/>
<ntp timeserver="90.155.53.32 2001:8B0:0:53::5A9B:3520"/>
<telnet allow="90.155.1.0/28"/>
<http/>
</services>
<rule-set target-interface="LAN1" drop="reject" comment="default
firewall rule - block incoming">
<rule source-interface="self" comment="allow from the FireBrick
though"/>
</rule-set>
</config>

By default the PPPoE will be used as the default route, saving this config should mean you have an internet connection!

Filters

More info on http://www.firebrick.co.uk/fb2700/firewall.php

The default filters will block incoming traffic, and allow outgoing traffic.

VoIP Rules

If you have VoIP phones on your LAN, then here are some example rules to allow SIP and RTP from the AAISP phone servers:

<rule name="SIP" source-ip="81.187.30.110-119" target-ip="90.155.91.8/29" target-port="5060-5069"/>
<rule name="RTP" target-ip="90.155.91.8/29" protocol="17" target-port="1025-5059 5070-" set-graph="RTP"/>

This also sets a graph for RTP

Restricting FireBrick Config access

You may only want to allow access to the FireBrick webserver from your LAN, do this in the http service, eg, change the current line to:

<http allow="90.155.1.1/28"/>

Native IPv6

Assuming you have an IPv6 block allocated to your line on Clueless and you're using the FB for PPPoE, then all the FB config needs is:

• An IPv6 address on the LAN subnet
• ra="true" in the subnet

Your computers should then get IPv6 details. test on http://ip.help.me.uk