This is a useful app for Apple Macintosh Users. LanScan is handy when you want to look up configured interfaces. It scans full IP-range with ARP packets and displays the IP address, MAC address, and vendor associated for each device detected.

LanScan is a free, simple, and effective network scanner that discovers all active devices on your local-area network.

Here are the basic command lines that comes in handy while working with the DD-WRT firmware via terminal.

Basic Command Lines

What is an update client?

An update client is a computer application or a feature in your router that keeps your hostname's IP address up-to-date with your registered domain name. Your IP address sometimes changes IP address (monthly, weekly, or even daily) without your notice, and this may cause all sorts of issues for client's using the domain name linked to a certain IP address. This update client is for DynDNS users.

Setting up VPN on the DD-WRT firmware is an intermediate tutorial due to complex configurations and security settings. For those who doesn't already know what PPTP (Point-to-Point Tunneling Protocol) is; PPTP allows you to connect securely from a remote location (such as your office, home, or school) to a LAN (Local Area Network) designated at another location, such as your workplace/office.

Note: PPTP has some security flaws and is considered deprecated. An alternative you may find just as easy is OpenVPN.

To setup a VPN through PPTP, login to your web GUI (http://192.168.1.1) and navigate to Services > VPN where you will see under PPTP Server, disabled by default. Select Enable and fill in the following information accordingly.

NTP Client (Network Time Protocol) is a software client that allows your router to sync it's time from a time server. If you haven't already set this up for your router, you might want to look into setting it up -especially if you're "Access Restrictons" and the "Traffic by Month" are enabled. If your router isn't synchronized with the right time, you may encounter some major problems with some services that the router has that uses dates and time to determine it's output.

Setting up the NTP client is easy if you know your time servers. To configure the NTP client, navigate to your web GUI (http://192.168.1.1) > Setup > Basic Settings and scroll down to the NTP Time Section.

1. Select "Enable" for NTP Client.
2. Choose your Time Zone for your location.
3. Set the Summer Time (DST) accordingly (See Time Zone settings below)
4. Enter the domain name or IP address of the Time Server.

Setting up your home web server is a fairly easy thing to do and deals mainly with port forwarding. However, there are a few settings to be configured and programs to install before your web server can be up and running.

If you're running Windows Server Enterprise 2008, there's a few settings you need to make on the operating system. But first thing first, you want to register your IP address with a domain name. There's plenty of free DNS services offered for this, but one of the most popular and widely used is DynDNS.org.

To do this visit DynDNS.org, create an account, and create a new host. Make your hostname and choose a domain name for it. Check the "Wildcard" box and choose "Host with IP address" for Service Type. For your "IP Address" click the link right under it that says "Your current IP address is: xxx.xxx.xxx.xxx" to automatically link your IP address to this hostname. Once you've completed those steps, click Activate to .. activate your hostname. The next step is to download the DynDNS Updater. This program automatically updates your hostname with your connected IP address, because every so often your IP address changes, and will require a manual IP update without the DynDNS Updater. You can download the program here: DynDNS Client Updater.

You can optimize your wireless connection for both a single router in a network and/or multiple routers setup as a wireless client bridge. This is fairly easy todo. With just a few minor changes to your wireless settings, you'll be able to optimize your connection speed.

Before

After

If you're using dd-wrt sp1, do not attempt this tutorial. You will not be able to configure a wireless client bridge in this version, so be sure to check your device's dd-wrt firmware version and update accordingly before starting this tutorial.

Assuming that your primary router is already flashed with dd-wrt v24 sp2 and setup with a home network with a LAN IP address of 192.168.1.1. If your primary router has a different LAN IP address, just adjust the IP accordingly to match that of yours and everything should work fine. There is no need to configure your primary router in this tutorial (although, in some cases - the wireless security needs to be changed to WPA2 Personal on both the primary and secondary router for it to work.)

Once you're done flashing your secondary router to sp2, turn your wifi connection off. Turning off your wifi connection while processing the config of your secondary router will prevent any errors or sudden disconnection that will result in a bricked router or even something worse.

Connect to the web GUI via a web browser (http://192.168.1.1) and enter your desired username and password. Navigate first to Wireless > Wireless Security. Change your wireless security to match that of your primary's router.

Windows Remote Desktop

Setting up Remote Desktop for your windows operating systems is fairly easy. Once you've set up your network and have your PC's connected to it, you'll automatically be able to connect to them remotely after changing the windows remote desktop connection option. However, you'll notice that when you're out at Wal-Mart or waiting at the dentist office, you wont be able to remotely connect to your windows operating system that has all your work documents on it. This is because your PC is only recognized as a trusted device when you're connected to your wireless network.

The problem here is to get your network to recognize your device, be it a mobile phone or desktop PC as a trusted device and grant access to the network you wish to connect to.

First off, you want to register your ip to a domain with DynDNS or any other domain name service so you won't have to memorize your ip address when trying to connect to your remote device. This is optional and doesn't have to be done, but is added for your connivence. This is also useful to do because every now and then, your ip address may decide it wants to change up numbers, thus becoming a whole new ip address you'll have to re-memorize. But with the DynDNS updater, it automatically updates the domain name with the new ip address for you, and U.E.N.O. it..

If you want to attach a USB storage device to your network's router running the DD-WRT v2 sp24, you should have the following materials ready and set up at hand.

1. External USB storage device.
2. Router (flashed with DD-WRT v2 sp24)

wireless client bridge

Here is a script that is useful if you have a wireless client bridge in your network. A wireless client is good to have within your network because it adds scalability and efficiency to your network. Nevertheless, in order for it to be reliable in the network; it has to be connected to your main router at all times. If you are experiencing a disconnection between your main router and your wireless client bridge often; you may want to add this script to your main router.

If you are running dd-wrt v24 presp2, you can add this script to your start up to ensure connection between your main router and your wireless client bridge.

In the main router's web GUI, navigate to Administration > Commands and copy and paste the following script in open text box. After you have edited the script to your wireless bridge's ip address click Save Startup

Fing - Network Analyzer

Here is an application both for Apple and Android mobile devices. This application is called Fing, and I find myself using this app. very often in aiding me to set up networks. Fing gives you power to have all the IP addresses and MAC addresses of all devices connected to your network at the current time; all at the push of a button. This allows the network administrator to easily log in IP or MAC addresses for access lists, port forwarding, quality of service (QoS), and wake on lan (WOL).

dd-wrt - "power to the router"

DD-WRT is a Linux based alternative OpenSource firmware suitable for a great variety of WLAN routers and embedded systems. The main emphasis lies on providing the easiest possible handling while at the same time supporting a great number of functionalities within the framework of the respective hardware platform used.

The graphical user interface is logically structured, and it is operated via a standard Web browser, so even non-technicians can configure the system in only a few simple steps.

Apart from the simple handling, speed and stability are also in the focus of our development work. Compared to the software preinstalled on many WLAN routers, DD-WRT allows a reliable operation with a clearly larger functionality that also fulfills the demands of professional deployment.

The huge user community gives support to DD-WRT developers and the users themselves in various ways. Thanks to this, potential flaws in the system can be detected very quickly and can thus be corrected without delay. DD-WRT users can find help and suggestions from other users in the user forums, and the Wiki containing further information and how-to guides is being expanded and maintained by the DD-WRT community as well.

For devices mainly used for private purposes, DD-WRT is freely available. Platforms used for commercial purposes require a paid license. Compared to the freely available version, the professional version also allows for configuration of the WLAN parameters, thus opening up the opportunity of creating e.g. reliable and powerful network infrastructures. Special demands can be fulfilled by specifically tailored versions of DD-WRT.

Main characteristics:

supports more than 200 different devices
comprehensive functionality
supports all current WLAN standards (802.11a/b/g/n*)
supports outdoor deployment*
supports enhanced frequencies *
VPN integration
supports various Hotspot systems
bandwidth management
multilingual user interface
*appropriate WLAN hardware required

DD-WRT is:

Sebastian Gottschall (BrainSlayer, founder, maindeveloper)
Christian Scheele (Chris, CEO)
Peter Steinhäuser (CEO)
Felix Fietkau (nbd/openwrt, madwifi)
Ankush Malhotra (Maksat)
Ales Majdic (Eko, Developer)
Sylvain Bothorel (Botho, router webdesign)
Elke Scheele (Online Shop)
Markus Quint (support)

... and a lot of supporters around the world

Source: http://www.dd-wrt.com/site/content/about