Archive for the ‘Networking’ Category

HOW TO : Delete exchange account on a Windows Mobile device

Sunday, May 13th, 2007

I use a T-Mobile Dash as my phone and mobile messaging platform. For those that are not aware, you pull e-mail from any Exchange 2003 server with SP2 from a Windows Mobile device over the air, using direct connect. The management features are not as robust as Blackberry for managing Windows Mobile devices, but it is a free feature :) .

I have been trying to figure out for the last few weeks, how I can switch the exchange server that my DASH has been configured for. Finally, a lot of googling revealed the following steps.

On your mobile device,

  • Go to Start -> Active Sync
  • Click  Menu – >  Options
  • Choose Microsoft Exchange
  • Click on Menu-> Delete

NOTE : This will delete all your e-mail, contacts and calendar entries that were synchronized using the old exchange server.

Blackberry : Administrator tip

Tuesday, March 13th, 2007

If you ever wanted to find out how to confirm that a message you have sent to a blackberry device has been delivered, you can send a message to the blackberry with just < confirm> in the subject. You will get a confirmation e-mail as soon as the message has been delivered to the blackberry device. We usually use it to check latency and other issues on our blackberry server.

HOW TO : Cognos Installation

Tuesday, March 13th, 2007

I tried setting up Cognos (Business Intelligence tool mainly used for reporting) on a test machine for Lakshmi to play around with. After going through the install, I can say with confidence that Cognos has some of the worst documentation :) . Here are some quick tips that you won’t find in the official documentation for someone trying to configure Cognos BI 8.x on a Win2k3 server running MS SQL 2005 and IIS 6.0.

  1. After installing Cognos, run the “Cognos Configuration” tool and change the “Gateway URI” setting to “http://servername:portnumber/cognos8/cgi-bin/cognosisapi.dll” in the environment section.
  2. Edit the default.htm and index.htm file in the “< cognos install directory >\cognos\c8\webcontent” directory and replace cognos.cgi with cognosisapi.dll
  3. Open ISS manager and go to Web Service Extension. Add a new web service extension called isapi and add cognosisapi.dll as a required file. Make sure to set the extension status to Allowed.

This should enable you to launch cognos and log into the web interface.

HOW TO : Linksys SRX200 + Emule

Tuesday, November 14th, 2006

Quick guide to configure your Linksys SRX200 router/switch to support emule.

  1. Assign a static IP address in the range assigned to you by the wireless router. In this case, Linksys assigns the 192.168.1.0/24 range. I will use 192.168.1.50 as an example.
  2. Open a browser window and go to http://192.168.1.1
  3. Log in with your admin credentials (it is admin/admin by default).
  4. Click on the “Application and Gaming” tab.
  5. Make sure that you are on the “Port Range Forward” page.
  6. Enter the following information
  7.    Application : Emule
       Start : 4660
       End : 4712
       Type : Both
       IP Address : 50
       Enable : Checked

  8. Click on “Save Settings”
  9. Launch Emule and you should be in business :)

Windows Command : How to get MAC address

Sunday, November 12th, 2006

I knew that you could get the MAC address of a network interface in Windows, by using “ipconfig /all“. Just discovered, this new command (that only works in Windows XP) “getmac“.

nmap : how to scan a network

Thursday, September 7th, 2006

If you want to scan a network or range of IPs for hosts that are on a network, you can use nmap with the following option

nmap -sL NETWORK/MASK (ex: nmap -sL 192.168.1.0/24)
or
nmap -sL NETWORKRANGE (ex: nmap -sL 192.168.1.0-50)

For a complete reference of nmap capabilities, go to http://insecure.org/nmap/man/.

HOW TO : Blackberry : How to use it as a modem

Wednesday, September 6th, 2006

On popular demand..A lot of people asked me how you can use the BB as a modem, the way I specified in this post. Here’s the link with detailed instructions on how to do this..

http://www.blackberryforums.com/blackberry-guides/2019-user-howto-use-blackberry-modem-laptop-11.html

Note: Make sure you have an unlimited data plan from your service provider or you can get dinged with a large bill :) .

RDP over SSH tunnel

Tuesday, September 5th, 2006

Necessity is the mother of invention.. Or so goes the old saying. I was on-call this weekend for off hour IT support. We usually provide our on-call engineers a wireless broadband card in case they need to get connected to the corporate network to troubleshoot/fix issues. This week, I was not able to get the wireless card, since we had to loan it to an exec. The only method to get onto the Internet was using my new 8700 blackberry. We have the EDGE service from T-mobile, which is not as fast as the Verizon BroadbandAccess.. We typically get ~128kbps with the EDGE connection and is enough to get our work done.. The problem with using the BB as a modem is that T-mobile blocks PPTP/IPSec traffic with this plan. Not to be outdone, I came up with a way to use the BB to connect to our internal network. Most of our support work is done on Windows, so we need to remote console into one of our servers to provide support. I did the following to get this working using our corporate SSH gateway to tunnel RDP traffic.

1) Download Putty (SSH Client).
2) Create a new session on Putty to the SSH gateway. In the “Tunnels” option, add the following options

Note: Replace the REMOTE_HOST with the IP address or hostname of your Windows server.
3) Click on ADD
4) Click on Open and connect to the SSH server with your credentials
5) Log into the remote serve by running the following command “mstsc /v:127.0.01:3390
Note: You can change the local port to any number you want. Make sure not to use 3389 as the local port, since it is already used by the remote desktop service on your windows workstation.

Picture your website

Saturday, September 2nd, 2006

I ran across Aharef’s blog while I was browsing the net. Was pretty impressed by a applet he wrote to visually represent a website, using the HTML tags as a source. Here’s a picture of my website

You can get a graph of your website using the URL below
http://www.aharef.info/static/htmlgraph/.

Disaster strikes Kudithipudi.Org – Part II

Monday, August 28th, 2006

One makes mistakes in haste, or so goes the ancient saying :) . As soon as I discovered that my hosting company for the past few years did not store backups for longer than a day, I switched to 1and1.com, but little did I know that 1an1.com doesn’t provide web site logs (statistics) with their basic package. Well, serves me right for not doing my research right. Now I am with the third hosting provider in as many days. While the admin interface is not as polished as 1and1.com, I like that hostrocket provides all the features that I want for a relatively inexpensive price and the fact that it has a 20-something CEO.Hopefully I am going to be here for a while.. :)

One a side note, I am working on restoring all my old posts. Expect to see them up in a few days. Need to engage my uber-database-guru friend for help with the restore :) .