Tech Sharing Blog

Proxy server is a server that sites between a client application, such as a web browser and a real server. It intercepts all requests to the real server to see if it can fulfill the requirests it self. If not, it forwards request to the real server.

There main purposes for using the proxy server are:

• to keep machines behind it anonymous (mainly for security)
• to speed up access to a resource (via caching). It is commonly used to cache web page from a web server
• to censor network services or content
• to forge transmitted content before delivery, eg: to insert advertisements

There are diff types of proxy server in generals:

• Transparent Proxy: it identifies itself as a proxy server and also make the original IP address available through the http headers. The generally use to cache websites but do not effectively provide any anonymity to those who use them.
• Anonymous Proxy: it identifies it self as a proxy server, but does not make the original IP address available. of proxy server is detectable, but provides reasonable anonymity for most users.
• Distorting Proxy: This type of proxy server identifies itself as a proxy server, but make an incorrect original IP address available through the http headers.
• High Anonymity Proxy: This type of proxy server does not identify itself as a proxy server and does not make available the original IP address.

You may easily get the free proxy server list from the Internet by Google it with the key word of “Free Proxy server list”. Or you may just access the following web site for the free Proxy server list:

• Proxy 4 Free (www.proxy4free.com)
• SamAir Proxy (www.samair.ru/proxy)
• Aliveproxy (www.aliveproxy.com)

Please bear in mind that when you use the free public proxy server, your transmitted data through the Proxy server may capture or monitor by some body including your login detail and password.

Step to set up the Proxy on difference browser:

Mozilla Firefox:

Tools -> Options -> Advanced -> Network -> Settings -> Manual proxy configuration -> enter the Proxy server IP and Port number

Google Chrome:
Options -> Under the Hood -> Change proxy settings -> Connections -> LAN Settings -> Proxy Server -> check the “use a proxy….” -> enter the proxy server IP and port number

* Google Chrome is share the same Proxy server setting with Internet Explorer

Internet Explorer:
Tools -> Internet Option -> Connections -> LAN Settings -> Proxy Server -> check the “use a proxy….” -> enter the proxy server IP and port number

Opera:
Tools -> Preferences -> Network -> Proxy Server… -> Select what ever Protocol to use the Proxy Server -> enter the proxy server IP and port number

Popularity: 2% [?]

Check the page’s last update date

1. Go to any web site as you like
2. Delete the content in the URL address bar
3. Enter the following script javascript:alert(document.lastModified)
4. Press Enter
5. This code will display any web page’s last update including the specific time, so by using the this script, you will know that the content you get is that the latest or not

Tech share latest update is 11 Oct 2009 16:36:23

Popularity: 1% [?]

Tech.david-cheong.com is giving out the 10% dicount coupon for all the reader. You may redeem this discount coupon when you purchase any of the laptop sleeve from EC-Lifestyle.com

How to use this discount code:

1. Go to EC-Lifestyle
2. Select the product you wish to buy
3. Register and check out the product
4. Confirm your shipping address and enter the the following discount code: 38147e19d3
5. Select the payment type either using Paypal or local bank payment
6. Click continue to proceed and you will get you updated total amount to checkout
7. Confirm the total amount and proceed to the payment gateway for the payment
8. Get your confirmation after payment
9. The product will be ship on the next working day after the payment done 

Enter the discount code when come to the payment page and select the payment type

You will see the updated price on the next page after you enter the discount code

Popularity: 1% [?]

ESET delivers the fastest, most effective antivirus software with spyware and malware protection available to combat viruses, spyware, rootkits, and other internet attacks, keeping your identity and data safe from hackers and thieves.

There are 2 type of product in general:

• ESET NOD32 Antivirus – Antivirus/Antispyware
• ESET Smart Security – NOD32/Firewall/Antispam

Click here to download ESET NOD32 Antivirus and Smart Security
Click here to get your free ESET NOD32 product update username and password

Popularity: 20% [?]

I created a table to display a link which consist of a long verification code plus some variable to pass to the web site. There is no any space within the long url and query string. This is not the problem, the problem is on my table, because of the link is in one long string without any space, so when it display on the screen, the table is expanded.

I come across few solution, some people suggest that using the javascript to split the string in to 2 or more row when it excess the string lenght limit. I don’t think this is the best solution, and finally get the solution of control the table using the CSS.

WORD-BREAK:BREAK-ALL;

Syntax:

<table style=”word-wrap: break-word;” width=100>
     <tr>
          <td>long_long_long_long_long_long_long_long_long_long_long_long_long_long_long_long_string</td>
    </tr>
</table>

Popularity: 1% [?]

Picasa now allow you to upload the photo in the new way by using email. You may get your photo on your Picasa web album by just sending the photo to to a secret email address, especially useful when you try to upload the photo from your mobile device.

This allows you to stream and caption photos on-the-go.

To get started, follow these steps:

• Sign in to your Picasa account
• Click on the Settings link on the top-right corner
• On the General tabs, go to “Upload photos by email” section and check the “Allow me to upload photos by email.”
• Enter the “secret word” with lenght between 6-15 characters. As you enter  this word, an email address appears.
• Click the “Save Change” button
• Upload your email by attach them to an email message and send it to the newly-created address

Use the email ‘Subject‘ line to add captions or to include the photos in a specific album. If the email ‘Subject’ line matches an existing online album title, your photos will be uploaded to that album. Otherwise the ‘Subject’ line will instead be added as a caption and the photos will be placed in the Drop Box album.

Take note that you can only attach up to 20 MB of photos in JPG, GIF and PNG formats.

Enabled mail upload function in your Picasa Web Album settings

Try uploading the photo from email to Picasa web albumCheck out the newly uploaded photo using email post

Check out the newly uploaded photo using email post

Popularity: 1% [?]