Create isolated network on Virtual Machine Manager - Centos 6.5

Since most of the Linux administration practice is done in a virtual environment, I thought I should create a video about it, as I am aware that some students at my college struggle with it in their labs. Please let me know if I missed anything or did not explain anything clearly.

Thanks,

ASUS RT N16 + OpenWRT + nodogsplash = WiFi Hotspot (For beginners)

 

1.                  Make sure you are directly connected to the router through a cable

·         Take an ethernet cable from your ASUS modem and plug it into your pc/laptop

2.                   Now access your modem by going into the browser and typing: 192.168.1.1

·         Go to administration tab and click on Firmware upgrade/update

NOTE: Please use internet explorer for all of these configurations. There are some issues reported in other browsers.

       

3.                   You will have to load a DD-WRT basic image first to load the openWRT image. You cannot directly load openWRT image for some reason I dont know of

·         Download the image by clicking on the link: www.dd-wrt.com/routerdb/de/download/Asus/RT-N16/-/dd-wrt.v24-14896_NEWD-2_K2.6_mini_RT-N16.trx/3763

4.                   Once the image is downloaded just click on browse on the ASUS firmware upgrade page and browse to the DDWRT image and upload it

5.                   router will restart and it will ask you to set a root username and password. Just set anything, you won't be using ddwrt for very long.

6.                   Now download the working openWRT image for RTN16 from here: http://downloads.openwrt.org/barrier_breaker/14.07/brcm47xx/mips74k/

·         Download the image named "openwrt-brcm47xx-mips74k-squashfs.trx"

7.                   Now access your routers website again: 192.168.1.1

8.                   Go to Administration -> Firmware Upgrade/Update

9.                   Browse to the squash.trx image and upload it. Router will restart by itself.

10.               OpenWRT does not come with the a Web User Interface, and using it is pretty much optional.

We will be installing a WEB UI just to make things easier.

11.               Open a command prompt sessions (cmd, can be opened by searching for cmd in start menu)

12.               type : telnet 192.168.1.1

13.               Now you should be connected to your router.

14.               Now take an ethernet cable from your Rogers modem and plug it into the WAN port at the back of your ASUS router(This should give your router internet access)

15.              Type these commands in the terminal

·         opkg update

·         opkg install luci

·         opkg upgrade libuci uci libc opkg busybox base-files dnsmasq libiptc dropbear mtd wl libgcc ppp wlc

16.              Now install NodogSplash

·         opkg install nodogsplash

17.              Configure uhtppd daemon to work on port 8080 (so you can access luci even when you are not authorized to go the internet)

·         vi /etc/config/uhttpd

·         replace line "list listen_http                       0.0.0.0:80" with "list listen_http 0.0.0.0:8080"

18.              Configure nodogsplash

·         There is a lot of options with nodogsplash, I did not change much except that I modified the redirect URL, so if the client gets the splash page and he/she authenticates, instead of going to the website they wanted to go, it will redirect them to the URL I want them to go, then they can server all the internet they want.

·         vi /etc/nodogsplash/nodogsplash.conf

·         you can change the value of "RedirectURL" to the website if you want to the redirection, otherwise leave it.

·         One thing you must do is add port 8080 to firewall rule. Look for "for administration from the GatewayInterface.  If not,  # comment these out."

·         add below port 443 this line "FirewallRule allow tcp port 8080"

19.              Start uhttpd and nodogsplash daemon

·         /etc/init.d/uhttpd enable

·         /etc/init.d/uhttpd start

·         /etc/init.d/nodogsplash enable

·         /etc/init.d/nodogsplash start

20.              Open your web browser and type "192.168.1.1:8080"

21.              Go to Network > WiFi and click on enable.

22.              Now if you connect through wifi you will get the default splash page that comes with nodogsplash. If you dont get it then restart the nodogsplash service by /etc/init.d/nodogsplash stop

            /etc/init.d/nodogsplash start

If you want to modify the splash page, which you most like would want to, then you can do so by vi /etc/nodogsplash/htdocs/splash.html
you can write your own html code there.

Let me know in the comments bar for any questions.

Enjoy!

My SOURCES:
http://www.youtube.com/watch?v=nw4bo4rXGgQ
https://projectfirewall4.wordpress.com/2012/02/01/installing-openwrt-firmware-on-asus-rt-n16-router/#comment-21
http://www.dd-wrt.com/wiki/index.php/Asus_RT-N16#How_to_restore_to_factory_firmware
http://wiki.openwrt.org/doc/howto/wireless.hotspot.nodogsplash
http://wiki.openwrt.org/doc/uci/uhttpd