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Create a VPN In Minutes…

Maybe you need to connect your network to terminals in different locations securely using the internet. Well a great tool, an Open Source tool lets you do that in a secure and safe manner.webgui-screenshot

OpenVPN is the best software to accomplish that. This software used for little, medium and large companies is recognized as the “Best SSL VPN” in 2007 and “Best Open Software Award”.

I had to create a network between 3 offices; Cancun, Mexico City and San Luis Potosi and it took me 15 minutes to do it with this tool.

A virtual private network (VPN) is a computer network in which some of the links between nodes are carried by open connections or virtual circuits in some larger network (e.g., the Internet) instead of by physical wires.

About OpenVPN

OpenVPN is a full-featured open source SSL VPN solution that accommodates a wide range of configurations, including remote access, site-to-site VPNs, Wi-Fi security, and enterprise-scale remote access solutions with load balancing, failover, and fine-grained access-controls. Starting with the fundamental premise that complexity is the enemy of security, OpenVPN offers a cost-effective, lightweight alternative to other VPN technologies that is well-targeted for the SME and enterprise markets.

OpenVPN combines security with ease-of-use

OpenVPN’s lightweight design sheds many of the complexities that characterize other VPN implementations. The OpenVPN security model is based on SSL, the industry standard for secure communications via the internet. OpenVPN implements OSI layer 2 or 3 secure network extension using the SSL/TLS protocol, supports flexible client authentication methods based on certificates, smart cards, and/or 2-factor authentication, and allows user or group-specific access control policies using firewall rules applied to the VPN virtual interface. OpenVPN is not a web application proxy and does not operate through a web browser.

Best of all is that you can use this software on Windows, Linux and Mac OS. So if you want to download it go to main site of OpenVPM or download GUI forĀ  Windows, Linux and Mac OS.

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HDR Imaging In Linux

This tool enables you to experiment with high-dynamic range lighting in a photo or 3D image that might be used in a game or 3D world. The options for controlling HDR lighting are simple: adjust a slider for gamma correction, load a tonal mapping tool to adjust light sources and other variables. Then, save your work for modeling in a 3D world.

snap-qt4_2 Qtpfsgui is an open source graphical user interface application that aims to provide a workflow for HDR imaging.

Supported HDR formats:

  • OpenEXR (extension: exr)
  • Radiance RGBE (extension: hdr)
  • Tiff formats: 16bit, 32bit (float) and LogLuv (extension: tiff)
  • Raw image formats (extension: various)
  • PFS native format (extension: pfs)

Supported LDR formats:

  • JPEG, PNG, PPM, PBM, TIFF(8 bit)

Supported features:

  • Create an HDR file from a set of images (formats: JPEG, TIFF 8bit and 16bit, RAW) of the same scene taken at different exposure setting.
  • Save and load HDR images.
  • Rotate and resize HDR images.
  • Tone map HDR images.
  • Copy exif data between sets of images.

Qtpfsgui is available for Linux, Windows and Mac OS X

Why this name?
Qt: the program uses Qt4 to show its graphical widgets.
pfs: the main backend library and original source code base.
gui: this stands simply for graphical user interface.

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Backup Your iPhone Or iPod Touch

http://emovilpro.com/blog/wp-content/uploads/2008/04/iphone.jpgIf you want to upgrade your firmware you must create a backup of your iPhone or iPod before you do something else. So here are the steps you have to follow according to Apple.

Creating a Backup

Backups can be created in the following ways:

  • If you have configured your iPhone or iPod touch to automatically sync with iTunes on a specific computer, iTunes will back up the iPhone or iPod touch after you connect it to that computer and sync with iTunes. iTunes will not automatically back up an iPhone or iPod touch that is not configured to sync with that computer. iTunes only makes one backup each time you connect, even if you sync multiple times before disconnecting.
  • If you choose to update the software, iTunes will back up the iPhone and iPod touch automatically.
  • If you choose to restore the software to factory settings, iTunes will ask you if you want to back up the iPhone and iPod touch. The backup created when you restore a device is separate from the one create when the device is synced. The backup created prior to a restore is marked in the syncing preferences of iTunes with the date and time when the backup was created.

Restoring from a Backup

To restore information from a backup:

  1. Connect the iPhone to the computer you normally sync with.
  2. In iTunes, select the Summary tab and click Restore (this erases all data on iPhone). When prompted, select the option to restore your settings.
    Notes:
    • Information you can sync from the computer (e.g., photos, videos, songs) that are not stored in the back up will need to be resynced. Photos you take with iPhone are included in the backup with iPhone software 1.1 and later.
    • Your passwords will need to be entered again if your restore your backup to a different device.
    • If you restored to a different iPhone, you will need to reactivate Visual Voicemail.

Deleting a Backup

If you want to delete a backup created by iTunes, follow these steps in iTunes 7.5 or later:

  1. Open iTunes Preferences:
    Windows: Choose Edit > Preferences.
    Mac: Choose iTunes > Preferences.
  2. Click Syncing (iPhone or iPod touch does not need to be connected).
  3. Select the backup you want to remove and click Remove Backup.
  4. Confirm you wish to remove the selected backup by clicking Remove Backup.
  5. Click OK to close the iTunes Preferences Window.


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