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--- adsl_modem [2012/02/15 08:30]
ispyisail
+++ adsl_modem [2013/05/21 16:03] (current)
eric
@@ Line 1: / Line 1: @@
 ====== Accessing your ADSL modem In Bridge Mode ======
-{{INLINETOC 2 4 }}
 ===== Introduction =====
-For those of you that have ADSL connections but want to deploy a gargoyle router with a single NAT you with need to find a DSL router that can be set into a "simple ADSL modem".
+Gargoyle supports PPPoE connections over ADSL links.  ADSL links use phone lines as there physical connection to the internet.  The phone line requires special modem equipment on both ends and filters to allow the line to be simultaneously used as a phone connection.  Gargoyle does not support PPPoA connections directly.
+For those of you that have PPPoE connections and want to deploy a Gargoyle router you would be wise to pay attention to the configuration of your ADSL device.  Most of these devices can be configured as routers themselves but since you are using Gargoyle it is best if you change the configuration the into a simple modem.  The name of this mode varies by manufacturer.  The term "bridged mode" seems the most common but something like "modem mode" or "simple ADSL modem" may also be used.  Changes to these devices are typically made through a web page you can access using the modem's IP address.
+There are several reasons to configure your modem in this fashion.  First the performance of Gargoyle's QoS will be improved since it will account for PPPoE overhead leading to more accurate control.  Second your ADSL Router becomes transparent and your Gargoyle router will obtain your WAN (wide area network) IP address directly. This is useful should you need to port forward or remotely gain access to your network from the internet.
+The three things that need to be done.
+  - Configure your modem with a fixed IP address which is not on the subnet used by your LAN.  For example if you LAN devices are in the 192.168.1.x subnet then give your modem the fixed IP 192.168.2.1,
+  - If possible enable DHCP on you modem.  In most of these devices DHCP can be active in modem mode although sometimes it is necessary to configure it before you change modes.
+  - Change the mode of the modem to the "bridge mode".
+Since all routers are different you will need to do some research to figure out how to navigate the screens on your modem to accomplish the above.  But if you are able to do these no further work is needed on your part and after resetting your router you will be able to access the modem from your LAN using the fixed IP address you gave it.
-You can of course put another ADSL router in front of the Gargole router but you will run into issues with 'double NAT' (network address translation). This is where NAT occurs twice, once at the firstADSL router and then again at the Gargoyle router.
+If you are unable to get DHCP to work on your modem in 'bridged' mode you can read further on how to manually configure your router to overcome this issue.
-To prevent this you can covert a certain routers into a simple ADSL modem.
+===== Steps to manually configure modem access =====
+For most people the above introduction section is all you need to read to properly configure your router.  However, if you cannot get the DHCP server on your modem to function in 'bridge mode' you can manually configure this function.
-The benefits of this are that your xDSL Router becomes transparent and your Gargoyle router will obtain your WAN (wide area network) IP address directly. This is useful should you need to port forward or
+To continue further you will need the following
-remotely gain access to your network from the internet.
-===== Requrements =====
   * PPPoE connection (PPPoA is not suitable)
   * Suitable xDSL modem (Netgear DG834)
-  * Gargole Router with SSH access
+  * Gargole Router with SSH access enabled
+  * WinSCP or other means to edit a file on your router
-Medium linux skills are required as CLI (command line Interface) is needed.
 ===== Setup =====
-{{ ::gargoyle_-_mode_mode.png?600 |}}
+{{ ::gargoyle_-_mode_mode2.png?600 |}}
-==== xDSL Modem Setup ====
+==== ADSL Modem Setup ====
-First set up your xDSL modem
+First set up your ADSL modem
 === Netgear DG834 example ===
@@ Line 34: / Line 46: @@
 future.
-==== Gargoyle Router Setup ====
+==== Manually Configuring your Gargoyle router ====
-The default AP mode is fine, setup from the GUI.
+Locate the following file on your router.
+///etc/ppp/ip-up.d/modemaccess.sh//
-With SSH access find and edit
+In the file find and uncomment the line with the define for 'ROUTER_IP' in it.  Edit the IP address such that it is an address which is in the same subnet as the fixed IP address you gave your router.  For example if your modem is 192.168.10.1 then make this line 192.168.10.2.
-///etc/ppp/ip-up.d/modemaccess.sh//
   #This script allows access to the ADSL modem web interface when pppoe is used.
@@ Line 58: / Line 70: @@
 </shell>
-Reboot your Gargoyle router and everything should work
+Save the file, reboot your Gargoyle router and you should be able to access the modem at its IP address using your web browser.
+===== ADSL Modem Access =====
+You should now be able to access your adsl modem via
+http://192.168.10.1

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